/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/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:54:27,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:54:27,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:54:27,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:54:27,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:54:27,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:54:27,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:54:27,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:54:27,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:54:27,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:54:27,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:54:27,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:54:27,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:54:27,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:54:27,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:54:27,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:54:27,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:54:27,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:54:27,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:54:27,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:54:27,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:54:27,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:54:27,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:54:27,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:54:27,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:54:27,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:54:27,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:54:27,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:54:27,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:54:27,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:54:27,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:54:27,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:54:27,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:54:27,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:54:27,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:54:27,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:54:27,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:54:27,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:54:27,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:54:27,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:54:27,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:54:27,329 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 22:54:27,356 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:54:27,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:54:27,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:54:27,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:54:27,358 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:54:27,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:54:27,359 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:54:27,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:54:27,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:54:27,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:54:27,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:54:27,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:54:27,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:54:27,360 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:54:27,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:54:27,361 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:54:27,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:54:27,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:54:27,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:54:27,362 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:54:27,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:54:27,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:54:27,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:54:27,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:54:27,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:54:27,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:54:27,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:54:27,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:54:27,364 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:54:27,364 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 22:54:27,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:54:27,913 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:54:27,918 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:54:27,919 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:54:27,920 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:54:27,921 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-09-24 22:54:28,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5262f55bd/a4708b7cea224d2eb6af0650b33904ae/FLAG4905263cb [2020-09-24 22:54:28,543 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:54:28,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-09-24 22:54:28,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5262f55bd/a4708b7cea224d2eb6af0650b33904ae/FLAG4905263cb [2020-09-24 22:54:28,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5262f55bd/a4708b7cea224d2eb6af0650b33904ae [2020-09-24 22:54:28,896 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:54:28,902 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:54:28,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:54:28,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:54:28,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:54:28,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:54:28" (1/1) ... [2020-09-24 22:54:28,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f88baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:54:28, skipping insertion in model container [2020-09-24 22:54:28,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:54:28" (1/1) ... [2020-09-24 22:54:28,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:54:28,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:54:29,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:54:29,194 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:54:29,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:54:29,332 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:54:29,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:54:29 WrapperNode [2020-09-24 22:54:29,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:54:29,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:54:29,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:54:29,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:54:29,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:54:29" (1/1) ... [2020-09-24 22:54:29,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:54:29" (1/1) ... [2020-09-24 22:54:29,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:54:29" (1/1) ... [2020-09-24 22:54:29,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:54:29" (1/1) ... [2020-09-24 22:54:29,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:54:29" (1/1) ... [2020-09-24 22:54:29,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:54:29" (1/1) ... [2020-09-24 22:54:29,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:54:29" (1/1) ... [2020-09-24 22:54:29,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:54:29,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:54:29,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:54:29,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:54:29,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:54:29" (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 22:54:29,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:54:29,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:54:29,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 22:54:29,469 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-09-24 22:54:29,470 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-09-24 22:54:29,470 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:54:29,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:54:29,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 22:54:29,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 22:54:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-09-24 22:54:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 22:54:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-09-24 22:54:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 22:54:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:54:29,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 22:54:29,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 22:54:29,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:54:29,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:54:29,967 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:54:29,967 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-09-24 22:54:29,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:54:29 BoogieIcfgContainer [2020-09-24 22:54:29,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:54:29,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:54:29,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:54:29,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:54:29,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:54:28" (1/3) ... [2020-09-24 22:54:29,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1b94ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:54:29, skipping insertion in model container [2020-09-24 22:54:29,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:54:29" (2/3) ... [2020-09-24 22:54:29,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1b94ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:54:29, skipping insertion in model container [2020-09-24 22:54:29,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:54:29" (3/3) ... [2020-09-24 22:54:29,984 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-09-24 22:54:29,996 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:54:30,007 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:54:30,028 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:54:30,059 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:54:30,059 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:54:30,059 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:54:30,060 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:54:30,060 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:54:30,060 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:54:30,060 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:54:30,060 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:54:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states. [2020-09-24 22:54:30,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-24 22:54:30,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:54:30,099 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] [2020-09-24 22:54:30,099 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:54:30,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:54:30,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1588916751, now seen corresponding path program 1 times [2020-09-24 22:54:30,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:54:30,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221165578] [2020-09-24 22:54:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:54:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:30,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:30,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:30,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:30,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:30,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 22:54:30,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:54:30,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-09-24 22:54:30,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:30,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:54:30,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:54:30,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:54:30,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 22:54:30,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:54:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:30,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:30,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:30,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:54:30,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:54:30,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 22:54:30,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:30,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:54:30,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:54:30,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:54:30,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:54:30,929 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 22:54:30,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221165578] [2020-09-24 22:54:30,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:54:30,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 22:54:30,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053193179] [2020-09-24 22:54:30,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 22:54:30,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:54:30,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 22:54:30,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 22:54:30,961 INFO L87 Difference]: Start difference. First operand 132 states. Second operand 3 states. [2020-09-24 22:54:31,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:54:31,271 INFO L93 Difference]: Finished difference Result 245 states and 295 transitions. [2020-09-24 22:54:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 22:54:31,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-24 22:54:31,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:54:31,288 INFO L225 Difference]: With dead ends: 245 [2020-09-24 22:54:31,288 INFO L226 Difference]: Without dead ends: 123 [2020-09-24 22:54:31,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 22:54:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-24 22:54:31,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-09-24 22:54:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-24 22:54:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2020-09-24 22:54:31,354 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 23 [2020-09-24 22:54:31,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:54:31,355 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2020-09-24 22:54:31,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 22:54:31,355 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2020-09-24 22:54:31,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-24 22:54:31,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:54:31,358 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] [2020-09-24 22:54:31,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:54:31,358 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:54:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:54:31,359 INFO L82 PathProgramCache]: Analyzing trace with hash -119454780, now seen corresponding path program 1 times [2020-09-24 22:54:31,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:54:31,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414117903] [2020-09-24 22:54:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:54:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:31,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:31,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:31,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:31,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:31,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 22:54:31,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:54:31,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-09-24 22:54:31,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:31,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:54:31,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 22:54:31,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 22:54:31,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:31,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:54:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:31,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:31,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:31,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:54:31,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:54:31,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 22:54:31,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:31,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:54:31,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:54:31,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:54:31,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 22:54:31,813 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 22:54:31,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414117903] [2020-09-24 22:54:31,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:54:31,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:54:31,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978582862] [2020-09-24 22:54:31,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:54:31,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:54:31,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:54:31,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:54:31,829 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 4 states. [2020-09-24 22:54:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:54:32,217 INFO L93 Difference]: Finished difference Result 303 states and 342 transitions. [2020-09-24 22:54:32,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:54:32,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-09-24 22:54:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:54:32,221 INFO L225 Difference]: With dead ends: 303 [2020-09-24 22:54:32,222 INFO L226 Difference]: Without dead ends: 199 [2020-09-24 22:54:32,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:54:32,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-24 22:54:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 124. [2020-09-24 22:54:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-24 22:54:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2020-09-24 22:54:32,242 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 23 [2020-09-24 22:54:32,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:54:32,243 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2020-09-24 22:54:32,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:54:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2020-09-24 22:54:32,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 22:54:32,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:54:32,244 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] [2020-09-24 22:54:32,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:54:32,245 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:54:32,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:54:32,245 INFO L82 PathProgramCache]: Analyzing trace with hash -395870253, now seen corresponding path program 1 times [2020-09-24 22:54:32,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:54:32,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11428795] [2020-09-24 22:54:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:54:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:32,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:32,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:32,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:32,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:32,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 22:54:32,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:54:32,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-09-24 22:54:32,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:32,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 22:54:32,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 22:54:32,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 22:54:32,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:54:32,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:54:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:32,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:32,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:32,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:54:32,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:54:32,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 22:54:32,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:32,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:54:32,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:54:32,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:54:32,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:54:32,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11428795] [2020-09-24 22:54:32,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:54:32,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 22:54:32,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234117266] [2020-09-24 22:54:32,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 22:54:32,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:54:32,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 22:54:32,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 22:54:32,791 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand 6 states. [2020-09-24 22:54:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:54:33,206 INFO L93 Difference]: Finished difference Result 310 states and 349 transitions. [2020-09-24 22:54:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 22:54:33,207 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-09-24 22:54:33,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:54:33,210 INFO L225 Difference]: With dead ends: 310 [2020-09-24 22:54:33,210 INFO L226 Difference]: Without dead ends: 206 [2020-09-24 22:54:33,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 22:54:33,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-24 22:54:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 131. [2020-09-24 22:54:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-24 22:54:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2020-09-24 22:54:33,227 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 30 [2020-09-24 22:54:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:54:33,227 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2020-09-24 22:54:33,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 22:54:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2020-09-24 22:54:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 22:54:33,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:54:33,229 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 22:54:33,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 22:54:33,230 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:54:33,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:54:33,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1926718692, now seen corresponding path program 2 times [2020-09-24 22:54:33,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:54:33,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106158605] [2020-09-24 22:54:33,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:54:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:33,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:33,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:33,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:34,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:34,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 22:54:34,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:54:34,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 806 [2020-09-24 22:54:34,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:34,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 22:54:34,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 22:54:34,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 22:54:34,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:34,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:54:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:34,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:34,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:34,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:54:34,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:54:34,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 22:54:34,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:34,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:54:34,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:54:34,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:54:34,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:54:34,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106158605] [2020-09-24 22:54:34,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:54:34,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 22:54:34,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405290580] [2020-09-24 22:54:34,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 22:54:34,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:54:34,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 22:54:34,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 22:54:34,124 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand 8 states. [2020-09-24 22:54:34,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:54:34,566 INFO L93 Difference]: Finished difference Result 317 states and 356 transitions. [2020-09-24 22:54:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 22:54:34,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-09-24 22:54:34,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:54:34,569 INFO L225 Difference]: With dead ends: 317 [2020-09-24 22:54:34,569 INFO L226 Difference]: Without dead ends: 213 [2020-09-24 22:54:34,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 22:54:34,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-24 22:54:34,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 138. [2020-09-24 22:54:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-24 22:54:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 151 transitions. [2020-09-24 22:54:34,581 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 151 transitions. Word has length 37 [2020-09-24 22:54:34,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:54:34,582 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 151 transitions. [2020-09-24 22:54:34,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 22:54:34,582 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 151 transitions. [2020-09-24 22:54:34,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 22:54:34,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:54:34,584 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 22:54:34,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 22:54:34,584 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:54:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:54:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1889524403, now seen corresponding path program 3 times [2020-09-24 22:54:34,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:54:34,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509021953] [2020-09-24 22:54:34,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:54:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:34,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:34,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:34,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:35,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:35,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 22:54:35,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:54:35,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1044 [2020-09-24 22:54:35,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 22:54:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 22:54:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 22:54:35,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:35,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:54:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:35,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:35,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:35,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:54:35,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:54:35,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 22:54:35,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:35,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:54:35,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:54:35,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:54:35,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:54:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:54:35,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509021953] [2020-09-24 22:54:35,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:54:35,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 22:54:35,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267161748] [2020-09-24 22:54:35,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 22:54:35,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:54:35,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 22:54:35,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 22:54:35,768 INFO L87 Difference]: Start difference. First operand 138 states and 151 transitions. Second operand 10 states. [2020-09-24 22:54:36,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:54:36,314 INFO L93 Difference]: Finished difference Result 324 states and 363 transitions. [2020-09-24 22:54:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 22:54:36,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-09-24 22:54:36,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:54:36,317 INFO L225 Difference]: With dead ends: 324 [2020-09-24 22:54:36,317 INFO L226 Difference]: Without dead ends: 220 [2020-09-24 22:54:36,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 22:54:36,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-24 22:54:36,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 145. [2020-09-24 22:54:36,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-24 22:54:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2020-09-24 22:54:36,328 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 44 [2020-09-24 22:54:36,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:54:36,329 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2020-09-24 22:54:36,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 22:54:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2020-09-24 22:54:36,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 22:54:36,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:54:36,331 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 22:54:36,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 22:54:36,332 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:54:36,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:54:36,332 INFO L82 PathProgramCache]: Analyzing trace with hash -898822652, now seen corresponding path program 4 times [2020-09-24 22:54:36,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:54:36,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323663915] [2020-09-24 22:54:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:54:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:36,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:36,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:36,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:37,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:37,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 22:54:37,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:54:37,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1279 [2020-09-24 22:54:37,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:37,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 22:54:37,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 22:54:37,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 22:54:37,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:37,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:54:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:37,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:37,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:37,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:54:37,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:54:37,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 22:54:37,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:37,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:54:37,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:54:37,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:54:37,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:54:37,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323663915] [2020-09-24 22:54:37,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:54:37,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 22:54:37,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311851940] [2020-09-24 22:54:37,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 22:54:37,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:54:37,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 22:54:37,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 22:54:37,740 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 12 states. [2020-09-24 22:54:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:54:38,415 INFO L93 Difference]: Finished difference Result 331 states and 370 transitions. [2020-09-24 22:54:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 22:54:38,416 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-09-24 22:54:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:54:38,418 INFO L225 Difference]: With dead ends: 331 [2020-09-24 22:54:38,418 INFO L226 Difference]: Without dead ends: 227 [2020-09-24 22:54:38,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 22:54:38,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-24 22:54:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 152. [2020-09-24 22:54:38,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-24 22:54:38,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2020-09-24 22:54:38,428 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 51 [2020-09-24 22:54:38,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:54:38,428 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2020-09-24 22:54:38,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 22:54:38,428 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2020-09-24 22:54:38,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 22:54:38,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:54:38,430 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 22:54:38,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 22:54:38,430 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:54:38,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:54:38,431 INFO L82 PathProgramCache]: Analyzing trace with hash -97538669, now seen corresponding path program 5 times [2020-09-24 22:54:38,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:54:38,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951842070] [2020-09-24 22:54:38,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:54:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:38,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:38,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:38,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:39,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:39,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 22:54:39,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:54:39,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1490 [2020-09-24 22:54:39,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:39,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 22:54:39,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 22:54:39,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 22:54:39,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:40,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:54:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:40,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:40,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:40,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:54:40,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:54:40,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 22:54:40,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:40,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:54:40,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:54:40,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:54:40,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:54:40,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951842070] [2020-09-24 22:54:40,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:54:40,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 22:54:40,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786563781] [2020-09-24 22:54:40,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 22:54:40,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:54:40,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 22:54:40,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-24 22:54:40,097 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand 14 states. [2020-09-24 22:54:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:54:40,949 INFO L93 Difference]: Finished difference Result 338 states and 377 transitions. [2020-09-24 22:54:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 22:54:40,950 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-09-24 22:54:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:54:40,953 INFO L225 Difference]: With dead ends: 338 [2020-09-24 22:54:40,953 INFO L226 Difference]: Without dead ends: 234 [2020-09-24 22:54:40,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-24 22:54:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-24 22:54:40,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 159. [2020-09-24 22:54:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-24 22:54:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 172 transitions. [2020-09-24 22:54:40,964 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 172 transitions. Word has length 58 [2020-09-24 22:54:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:54:40,965 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 172 transitions. [2020-09-24 22:54:40,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 22:54:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 172 transitions. [2020-09-24 22:54:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 22:54:40,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:54:40,966 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 22:54:40,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 22:54:40,967 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:54:40,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:54:40,967 INFO L82 PathProgramCache]: Analyzing trace with hash -841728220, now seen corresponding path program 6 times [2020-09-24 22:54:40,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:54:40,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751991944] [2020-09-24 22:54:40,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:54:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:41,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:41,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:41,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:43,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:43,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 22:54:43,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:54:43,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2015 [2020-09-24 22:54:43,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 22:54:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 22:54:43,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 22:54:43,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:43,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:54:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:43,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:43,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:43,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:54:43,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:54:43,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 22:54:43,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:43,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:54:43,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:54:43,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:54:43,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:54:43,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751991944] [2020-09-24 22:54:43,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:54:43,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 22:54:43,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057708497] [2020-09-24 22:54:43,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 22:54:43,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:54:43,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 22:54:43,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 22:54:43,217 INFO L87 Difference]: Start difference. First operand 159 states and 172 transitions. Second operand 16 states. [2020-09-24 22:54:44,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:54:44,007 INFO L93 Difference]: Finished difference Result 345 states and 384 transitions. [2020-09-24 22:54:44,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 22:54:44,008 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-09-24 22:54:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:54:44,010 INFO L225 Difference]: With dead ends: 345 [2020-09-24 22:54:44,010 INFO L226 Difference]: Without dead ends: 241 [2020-09-24 22:54:44,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-24 22:54:44,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-24 22:54:44,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 166. [2020-09-24 22:54:44,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-24 22:54:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 179 transitions. [2020-09-24 22:54:44,020 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 179 transitions. Word has length 65 [2020-09-24 22:54:44,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:54:44,021 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 179 transitions. [2020-09-24 22:54:44,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 22:54:44,021 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 179 transitions. [2020-09-24 22:54:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 22:54:44,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:54:44,027 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 22:54:44,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 22:54:44,027 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:54:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:54:44,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1163593613, now seen corresponding path program 7 times [2020-09-24 22:54:44,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:54:44,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29574746] [2020-09-24 22:54:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:54:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:44,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:44,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:44,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:46,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:46,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 22:54:46,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:54:46,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2350 [2020-09-24 22:54:46,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:46,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 22:54:46,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 22:54:46,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 22:54:46,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:46,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:54:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:46,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:46,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:46,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:54:46,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:54:46,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 22:54:46,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:46,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:54:46,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:54:46,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:54:46,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:54:46,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29574746] [2020-09-24 22:54:46,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:54:46,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 22:54:46,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93908006] [2020-09-24 22:54:46,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 22:54:46,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:54:46,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 22:54:46,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-24 22:54:46,634 INFO L87 Difference]: Start difference. First operand 166 states and 179 transitions. Second operand 18 states. [2020-09-24 22:54:47,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:54:47,542 INFO L93 Difference]: Finished difference Result 352 states and 391 transitions. [2020-09-24 22:54:47,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 22:54:47,542 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-09-24 22:54:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:54:47,544 INFO L225 Difference]: With dead ends: 352 [2020-09-24 22:54:47,545 INFO L226 Difference]: Without dead ends: 248 [2020-09-24 22:54:47,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-24 22:54:47,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-24 22:54:47,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 173. [2020-09-24 22:54:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-09-24 22:54:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 186 transitions. [2020-09-24 22:54:47,553 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 186 transitions. Word has length 72 [2020-09-24 22:54:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:54:47,553 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 186 transitions. [2020-09-24 22:54:47,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 22:54:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 186 transitions. [2020-09-24 22:54:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 22:54:47,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:54:47,555 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 22:54:47,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 22:54:47,555 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:54:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:54:47,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1950418876, now seen corresponding path program 8 times [2020-09-24 22:54:47,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:54:47,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37119080] [2020-09-24 22:54:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:54:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:47,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:47,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:47,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:50,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:50,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-24 22:54:50,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:54:50,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2469 [2020-09-24 22:54:50,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:50,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 22:54:50,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 22:54:50,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-24 22:54:50,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:50,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:54:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:50,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:50,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:50,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:54:50,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:54:50,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 22:54:50,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:50,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:54:50,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:54:50,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:54:50,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:54:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:54:50,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37119080] [2020-09-24 22:54:50,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:54:50,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 22:54:50,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547658347] [2020-09-24 22:54:50,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 22:54:50,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:54:50,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 22:54:50,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-24 22:54:50,267 INFO L87 Difference]: Start difference. First operand 173 states and 186 transitions. Second operand 20 states. [2020-09-24 22:54:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:54:51,415 INFO L93 Difference]: Finished difference Result 359 states and 398 transitions. [2020-09-24 22:54:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 22:54:51,416 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2020-09-24 22:54:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:54:51,418 INFO L225 Difference]: With dead ends: 359 [2020-09-24 22:54:51,418 INFO L226 Difference]: Without dead ends: 255 [2020-09-24 22:54:51,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 22:54:51,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-24 22:54:51,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 180. [2020-09-24 22:54:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-24 22:54:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 193 transitions. [2020-09-24 22:54:51,427 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 193 transitions. Word has length 79 [2020-09-24 22:54:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:54:51,428 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 193 transitions. [2020-09-24 22:54:51,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 22:54:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 193 transitions. [2020-09-24 22:54:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-24 22:54:51,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:54:51,429 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 22:54:51,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 22:54:51,430 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:54:51,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:54:51,430 INFO L82 PathProgramCache]: Analyzing trace with hash 386775891, now seen corresponding path program 9 times [2020-09-24 22:54:51,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:54:51,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364068916] [2020-09-24 22:54:51,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:54:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:51,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:51,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:52,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:54,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:54,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-09-24 22:54:54,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:54:54,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2589 [2020-09-24 22:54:54,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:54,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 22:54:54,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 22:54:54,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-24 22:54:54,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:54,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:54:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:54,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:54,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:54,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:54:54,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:54:54,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 22:54:54,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:54,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:54:54,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:54:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:54:54,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:54:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:54:54,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364068916] [2020-09-24 22:54:54,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:54:54,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 22:54:54,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954788483] [2020-09-24 22:54:54,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 22:54:54,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:54:54,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 22:54:54,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-24 22:54:54,317 INFO L87 Difference]: Start difference. First operand 180 states and 193 transitions. Second operand 22 states. [2020-09-24 22:54:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:54:55,388 INFO L93 Difference]: Finished difference Result 366 states and 405 transitions. [2020-09-24 22:54:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 22:54:55,388 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2020-09-24 22:54:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:54:55,390 INFO L225 Difference]: With dead ends: 366 [2020-09-24 22:54:55,391 INFO L226 Difference]: Without dead ends: 262 [2020-09-24 22:54:55,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 22:54:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-24 22:54:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 187. [2020-09-24 22:54:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-09-24 22:54:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 200 transitions. [2020-09-24 22:54:55,400 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 200 transitions. Word has length 86 [2020-09-24 22:54:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:54:55,401 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 200 transitions. [2020-09-24 22:54:55,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 22:54:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 200 transitions. [2020-09-24 22:54:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-24 22:54:55,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:54:55,402 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 22:54:55,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 22:54:55,402 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:54:55,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:54:55,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1935620452, now seen corresponding path program 10 times [2020-09-24 22:54:55,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:54:55,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115367570] [2020-09-24 22:54:55,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:54:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:55,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:55,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:57,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:58,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:58,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 22:54:58,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:54:58,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2844 [2020-09-24 22:54:58,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:58,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 22:54:58,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 22:54:58,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 22:54:58,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:58,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:54:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:54:58,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:54:58,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:54:58,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:54:58,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:54:58,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 22:54:58,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:54:58,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:54:58,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:54:58,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:54:58,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:54:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:54:58,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115367570] [2020-09-24 22:54:58,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:54:58,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 22:54:58,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427286871] [2020-09-24 22:54:58,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 22:54:58,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:54:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 22:54:58,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-24 22:54:58,617 INFO L87 Difference]: Start difference. First operand 187 states and 200 transitions. Second operand 24 states. [2020-09-24 22:55:00,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:00,084 INFO L93 Difference]: Finished difference Result 373 states and 412 transitions. [2020-09-24 22:55:00,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 22:55:00,085 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2020-09-24 22:55:00,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:00,087 INFO L225 Difference]: With dead ends: 373 [2020-09-24 22:55:00,088 INFO L226 Difference]: Without dead ends: 269 [2020-09-24 22:55:00,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 22:55:00,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-24 22:55:00,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 194. [2020-09-24 22:55:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-24 22:55:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 207 transitions. [2020-09-24 22:55:00,097 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 207 transitions. Word has length 93 [2020-09-24 22:55:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:00,097 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 207 transitions. [2020-09-24 22:55:00,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 22:55:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 207 transitions. [2020-09-24 22:55:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-24 22:55:00,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:00,098 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 22:55:00,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 22:55:00,099 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:00,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:00,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2080901581, now seen corresponding path program 11 times [2020-09-24 22:55:00,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:00,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616478323] [2020-09-24 22:55:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:00,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:00,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:02,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:03,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:03,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-09-24 22:55:03,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:55:03,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3500 [2020-09-24 22:55:03,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:03,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 22:55:03,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 22:55:03,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 22:55:03,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:03,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:03,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:03,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:03,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:55:03,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:03,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 22:55:03,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:03,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:03,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:03,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:03,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:03,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616478323] [2020-09-24 22:55:03,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:03,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 22:55:03,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442526054] [2020-09-24 22:55:03,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 22:55:03,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:03,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 22:55:03,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-24 22:55:03,968 INFO L87 Difference]: Start difference. First operand 194 states and 207 transitions. Second operand 26 states. [2020-09-24 22:55:05,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:05,393 INFO L93 Difference]: Finished difference Result 380 states and 419 transitions. [2020-09-24 22:55:05,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-24 22:55:05,394 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 100 [2020-09-24 22:55:05,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:05,396 INFO L225 Difference]: With dead ends: 380 [2020-09-24 22:55:05,396 INFO L226 Difference]: Without dead ends: 276 [2020-09-24 22:55:05,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-24 22:55:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-09-24 22:55:05,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 201. [2020-09-24 22:55:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-09-24 22:55:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 214 transitions. [2020-09-24 22:55:05,406 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 214 transitions. Word has length 100 [2020-09-24 22:55:05,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:05,406 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 214 transitions. [2020-09-24 22:55:05,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 22:55:05,406 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 214 transitions. [2020-09-24 22:55:05,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-24 22:55:05,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:05,407 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 22:55:05,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 22:55:05,408 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:05,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1952907908, now seen corresponding path program 12 times [2020-09-24 22:55:05,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:05,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477825082] [2020-09-24 22:55:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:05,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:05,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:06,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:08,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:08,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-09-24 22:55:08,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:55:08,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2777 [2020-09-24 22:55:08,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:08,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 22:55:08,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 22:55:08,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 22:55:08,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:08,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:08,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:08,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:08,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:55:08,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:08,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 22:55:08,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:08,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:08,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:08,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:08,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:08,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477825082] [2020-09-24 22:55:08,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:08,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 22:55:08,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194392002] [2020-09-24 22:55:08,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 22:55:08,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:08,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 22:55:08,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-24 22:55:08,659 INFO L87 Difference]: Start difference. First operand 201 states and 214 transitions. Second operand 28 states. [2020-09-24 22:55:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:09,857 INFO L93 Difference]: Finished difference Result 387 states and 426 transitions. [2020-09-24 22:55:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 22:55:09,858 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2020-09-24 22:55:09,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:09,860 INFO L225 Difference]: With dead ends: 387 [2020-09-24 22:55:09,860 INFO L226 Difference]: Without dead ends: 283 [2020-09-24 22:55:09,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-24 22:55:09,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-24 22:55:09,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 208. [2020-09-24 22:55:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-09-24 22:55:09,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 221 transitions. [2020-09-24 22:55:09,884 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 221 transitions. Word has length 107 [2020-09-24 22:55:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:09,888 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 221 transitions. [2020-09-24 22:55:09,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 22:55:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 221 transitions. [2020-09-24 22:55:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-09-24 22:55:09,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:09,891 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 22:55:09,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 22:55:09,894 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:09,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:09,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1701947667, now seen corresponding path program 13 times [2020-09-24 22:55:09,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:09,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072294924] [2020-09-24 22:55:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:09,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:10,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:10,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:13,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:13,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-24 22:55:13,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:55:13,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3510 [2020-09-24 22:55:13,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:13,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 22:55:13,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 22:55:13,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-24 22:55:13,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:13,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:13,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:13,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:13,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:55:13,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:13,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 22:55:13,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:13,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:13,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:13,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:13,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072294924] [2020-09-24 22:55:13,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:13,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-24 22:55:13,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549400265] [2020-09-24 22:55:13,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-24 22:55:13,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:13,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-24 22:55:13,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-24 22:55:13,958 INFO L87 Difference]: Start difference. First operand 208 states and 221 transitions. Second operand 30 states. [2020-09-24 22:55:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:15,571 INFO L93 Difference]: Finished difference Result 394 states and 433 transitions. [2020-09-24 22:55:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-24 22:55:15,571 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2020-09-24 22:55:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:15,574 INFO L225 Difference]: With dead ends: 394 [2020-09-24 22:55:15,575 INFO L226 Difference]: Without dead ends: 290 [2020-09-24 22:55:15,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-24 22:55:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-24 22:55:15,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 215. [2020-09-24 22:55:15,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-24 22:55:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 228 transitions. [2020-09-24 22:55:15,584 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 228 transitions. Word has length 114 [2020-09-24 22:55:15,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:15,585 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 228 transitions. [2020-09-24 22:55:15,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-24 22:55:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 228 transitions. [2020-09-24 22:55:15,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-24 22:55:15,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:15,586 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 22:55:15,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 22:55:15,587 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:15,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:15,587 INFO L82 PathProgramCache]: Analyzing trace with hash 520639396, now seen corresponding path program 14 times [2020-09-24 22:55:15,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:15,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581254599] [2020-09-24 22:55:15,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:15,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:16,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:16,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking...