/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/string-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 03:26:40,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:26:40,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:26:40,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:26:40,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:26:40,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:26:40,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:26:40,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:26:40,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:26:40,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:26:40,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:26:40,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:26:40,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:26:40,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:26:40,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:26:40,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:26:40,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:26:40,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:26:40,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:26:40,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:26:40,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:26:40,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:26:40,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:26:40,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:26:40,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:26:40,291 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:26:40,291 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:26:40,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:26:40,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:26:40,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:26:40,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:26:40,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:26:40,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:26:40,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:26:40,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:26:40,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:26:40,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:26:40,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:26:40,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:26:40,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:26:40,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:26:40,303 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 03:26:40,331 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:26:40,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:26:40,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:26:40,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:26:40,334 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:26:40,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:26:40,334 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:26:40,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:26:40,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:26:40,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:26:40,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:26:40,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:26:40,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:26:40,335 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:26:40,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:26:40,336 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:26:40,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:26:40,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:26:40,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:26:40,337 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:26:40,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:26:40,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:26:40,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:26:40,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:26:40,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:26:40,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:26:40,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:26:40,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:26:40,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:26:40,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-09-25 03:26:40,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:26:40,860 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:26:40,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:26:40,867 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:26:40,868 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:26:40,869 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-2.i [2020-09-25 03:26:40,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5c711fb7/9e9ece90e87045c8b6217f999af5ad96/FLAG3f816c2b1 [2020-09-25 03:26:41,548 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:26:41,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-2.i [2020-09-25 03:26:41,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5c711fb7/9e9ece90e87045c8b6217f999af5ad96/FLAG3f816c2b1 [2020-09-25 03:26:41,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5c711fb7/9e9ece90e87045c8b6217f999af5ad96 [2020-09-25 03:26:41,864 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:26:41,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:26:41,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:26:41,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:26:41,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:26:41,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:26:41" (1/1) ... [2020-09-25 03:26:41,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72eb96f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:41, skipping insertion in model container [2020-09-25 03:26:41,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:26:41" (1/1) ... [2020-09-25 03:26:41,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:26:41,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:26:42,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:26:42,204 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:26:42,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:26:42,260 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:26:42,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42 WrapperNode [2020-09-25 03:26:42,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:26:42,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:26:42,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:26:42,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:26:42,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:26:42,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:26:42,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:26:42,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:26:42,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:26:42,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:26:42,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:26:42,490 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 03:26:42,490 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:26:42,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:26:42,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:26:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 03:26:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 03:26:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:26:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 03:26:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:26:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 03:26:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 03:26:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 03:26:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 03:26:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:26:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:26:42,942 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:26:42,942 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-25 03:26:42,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:26:42 BoogieIcfgContainer [2020-09-25 03:26:42,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:26:42,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:26:42,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:26:42,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:26:42,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:26:41" (1/3) ... [2020-09-25 03:26:42,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a315bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:26:42, skipping insertion in model container [2020-09-25 03:26:42,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (2/3) ... [2020-09-25 03:26:42,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a315bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:26:42, skipping insertion in model container [2020-09-25 03:26:42,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:26:42" (3/3) ... [2020-09-25 03:26:42,960 INFO L109 eAbstractionObserver]: Analyzing ICFG string-2.i [2020-09-25 03:26:42,973 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:26:42,984 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:26:43,008 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:26:43,038 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:26:43,039 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:26:43,039 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:26:43,039 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:26:43,039 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:26:43,039 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:26:43,039 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:26:43,039 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:26:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-25 03:26:43,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 03:26:43,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:43,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:43,076 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:43,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:43,082 INFO L82 PathProgramCache]: Analyzing trace with hash -768807104, now seen corresponding path program 1 times [2020-09-25 03:26:43,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:43,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655061694] [2020-09-25 03:26:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:43,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:43,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:43,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:43,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:43,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:43,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:43,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 03:26:43,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 03:26:43,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-09-25 03:26:43,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:43,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:43,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 03:26:43,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:43,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 03:26:43,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:43,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:43,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:43,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:43,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:43,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 03:26:43,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:43,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:43,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:43,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:43,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:43,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655061694] [2020-09-25 03:26:43,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:26:43,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 03:26:43,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156721201] [2020-09-25 03:26:43,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 03:26:43,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:43,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 03:26:43,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 03:26:43,747 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 3 states. [2020-09-25 03:26:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:44,161 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2020-09-25 03:26:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 03:26:44,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-25 03:26:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:44,180 INFO L225 Difference]: With dead ends: 188 [2020-09-25 03:26:44,181 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 03:26:44,187 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 [2020-09-25 03:26:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 03:26:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-09-25 03:26:44,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 03:26:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-09-25 03:26:44,255 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 37 [2020-09-25 03:26:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:44,256 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-09-25 03:26:44,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 03:26:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-09-25 03:26:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 03:26:44,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:44,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:44,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:26:44,260 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:44,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:44,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1309055982, now seen corresponding path program 1 times [2020-09-25 03:26:44,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:44,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783862254] [2020-09-25 03:26:44,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:44,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:44,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:44,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:44,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 03:26:44,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:26:44,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-09-25 03:26:44,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:44,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:26:44,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 03:26:44,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 03:26:44,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:44,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:44,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:44,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:44,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:44,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:44,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 03:26:44,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:44,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:44,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:44,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:44,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:44,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783862254] [2020-09-25 03:26:44,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:26:44,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 03:26:44,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202049981] [2020-09-25 03:26:44,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 03:26:44,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:44,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 03:26:44,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 03:26:44,736 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 4 states. [2020-09-25 03:26:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:44,955 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-09-25 03:26:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 03:26:44,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-25 03:26:44,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:44,957 INFO L225 Difference]: With dead ends: 144 [2020-09-25 03:26:44,959 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 03:26:44,961 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 [2020-09-25 03:26:44,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 03:26:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-25 03:26:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-25 03:26:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-09-25 03:26:44,982 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 41 [2020-09-25 03:26:44,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:44,984 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-09-25 03:26:44,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 03:26:44,984 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-09-25 03:26:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 03:26:44,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:44,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:44,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:26:44,989 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:44,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:44,992 INFO L82 PathProgramCache]: Analyzing trace with hash 512896601, now seen corresponding path program 1 times [2020-09-25 03:26:44,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:44,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779537929] [2020-09-25 03:26:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:45,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:45,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:45,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:45,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 03:26:45,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:26:45,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-09-25 03:26:45,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:45,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:26:45,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-25 03:26:45,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 03:26:45,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:45,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:45,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:45,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:45,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:45,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:45,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:26:45,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:45,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:45,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:45,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:45,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:26:45,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779537929] [2020-09-25 03:26:45,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:45,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 03:26:45,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326169507] [2020-09-25 03:26:45,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 03:26:45,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:45,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 03:26:45,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:26:45,867 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 6 states. [2020-09-25 03:26:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:46,109 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2020-09-25 03:26:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 03:26:46,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-09-25 03:26:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:46,111 INFO L225 Difference]: With dead ends: 140 [2020-09-25 03:26:46,111 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 03:26:46,112 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 [2020-09-25 03:26:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 03:26:46,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-09-25 03:26:46,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 03:26:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-09-25 03:26:46,140 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 55 [2020-09-25 03:26:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:46,140 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-09-25 03:26:46,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 03:26:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-09-25 03:26:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 03:26:46,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:46,144 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:46,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:26:46,145 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:46,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1625165933, now seen corresponding path program 2 times [2020-09-25 03:26:46,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:46,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280699753] [2020-09-25 03:26:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:46,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:46,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:47,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 03:26:47,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:26:47,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 928 [2020-09-25 03:26:47,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:47,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:26:47,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-25 03:26:47,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 03:26:47,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:47,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:47,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:47,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:47,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:47,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 03:26:47,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:47,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:47,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:47,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:47,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:26:47,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280699753] [2020-09-25 03:26:47,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:47,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 03:26:47,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368396594] [2020-09-25 03:26:47,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 03:26:47,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:47,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 03:26:47,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:26:47,235 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 8 states. [2020-09-25 03:26:47,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:47,473 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2020-09-25 03:26:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 03:26:47,473 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-25 03:26:47,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:47,475 INFO L225 Difference]: With dead ends: 147 [2020-09-25 03:26:47,475 INFO L226 Difference]: Without dead ends: 103 [2020-09-25 03:26:47,476 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 [2020-09-25 03:26:47,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-25 03:26:47,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-09-25 03:26:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 03:26:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-09-25 03:26:47,485 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 62 [2020-09-25 03:26:47,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:47,486 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-09-25 03:26:47,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 03:26:47,486 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-09-25 03:26:47,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 03:26:47,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:47,488 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:47,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:26:47,488 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:47,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:47,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2072721689, now seen corresponding path program 3 times [2020-09-25 03:26:47,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:47,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135039112] [2020-09-25 03:26:47,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:47,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:48,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 03:26:48,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:26:48,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1180 [2020-09-25 03:26:48,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:48,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:26:48,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-25 03:26:48,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 03:26:48,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:48,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:48,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:48,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:48,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:48,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:26:48,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:48,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:48,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:48,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:48,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:26:48,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135039112] [2020-09-25 03:26:48,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:48,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 03:26:48,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34762552] [2020-09-25 03:26:48,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 03:26:48,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:48,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 03:26:48,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 03:26:48,814 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 10 states. [2020-09-25 03:26:49,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:49,091 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2020-09-25 03:26:49,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 03:26:49,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-25 03:26:49,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:49,093 INFO L225 Difference]: With dead ends: 154 [2020-09-25 03:26:49,095 INFO L226 Difference]: Without dead ends: 110 [2020-09-25 03:26:49,097 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 [2020-09-25 03:26:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-25 03:26:49,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-09-25 03:26:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 03:26:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-09-25 03:26:49,120 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 69 [2020-09-25 03:26:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:49,120 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-09-25 03:26:49,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 03:26:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-09-25 03:26:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 03:26:49,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:49,122 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:49,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:26:49,127 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:49,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:49,128 INFO L82 PathProgramCache]: Analyzing trace with hash 480988371, now seen corresponding path program 4 times [2020-09-25 03:26:49,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:49,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969072932] [2020-09-25 03:26:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:49,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:49,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:50,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:50,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-25 03:26:50,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:26:50,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1830 [2020-09-25 03:26:50,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:50,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 03:26:50,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-25 03:26:50,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 03:26:50,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:51,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:51,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:51,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:51,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:51,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:51,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:26:51,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:51,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:51,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:51,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:51,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:26:51,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969072932] [2020-09-25 03:26:51,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:51,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 03:26:51,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143376287] [2020-09-25 03:26:51,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 03:26:51,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:51,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 03:26:51,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 03:26:51,175 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 12 states. [2020-09-25 03:26:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:51,505 INFO L93 Difference]: Finished difference Result 156 states and 165 transitions. [2020-09-25 03:26:51,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 03:26:51,505 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-09-25 03:26:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:51,507 INFO L225 Difference]: With dead ends: 156 [2020-09-25 03:26:51,507 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 03:26:51,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 03:26:51,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 03:26:51,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-09-25 03:26:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 03:26:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-25 03:26:51,516 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 76 [2020-09-25 03:26:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:51,516 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-25 03:26:51,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 03:26:51,516 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-25 03:26:51,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 03:26:51,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:51,518 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:51,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 03:26:51,518 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:51,519 INFO L82 PathProgramCache]: Analyzing trace with hash 662336473, now seen corresponding path program 5 times [2020-09-25 03:26:51,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:51,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106634416] [2020-09-25 03:26:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:51,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:51,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:51,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-25 03:26:51,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:51,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-09-25 03:26:51,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:26:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 03:26:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 03:26:51,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:51,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:51,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:51,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:51,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:51,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:51,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:26:51,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:51,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:51,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:51,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:51,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 03:26:51,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106634416] [2020-09-25 03:26:51,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:51,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 03:26:51,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955913245] [2020-09-25 03:26:51,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 03:26:51,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 03:26:51,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:26:51,742 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 6 states. [2020-09-25 03:26:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:51,900 INFO L93 Difference]: Finished difference Result 203 states and 213 transitions. [2020-09-25 03:26:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 03:26:51,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-09-25 03:26:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:51,902 INFO L225 Difference]: With dead ends: 203 [2020-09-25 03:26:51,902 INFO L226 Difference]: Without dead ends: 119 [2020-09-25 03:26:51,903 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 [2020-09-25 03:26:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-25 03:26:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2020-09-25 03:26:51,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-25 03:26:51,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-25 03:26:51,910 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 83 [2020-09-25 03:26:51,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:51,910 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-25 03:26:51,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 03:26:51,911 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-25 03:26:51,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-25 03:26:51,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:51,912 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:51,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 03:26:51,913 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:51,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:51,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1088777214, now seen corresponding path program 6 times [2020-09-25 03:26:51,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:51,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224505836] [2020-09-25 03:26:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:51,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:52,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:52,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-25 03:26:52,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:52,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-09-25 03:26:52,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:52,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:26:52,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 03:26:52,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 03:26:52,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:52,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:52,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:52,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:52,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:52,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:52,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 03:26:52,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:52,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:52,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:52,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:52,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 03:26:52,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224505836] [2020-09-25 03:26:52,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:52,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 03:26:52,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492926111] [2020-09-25 03:26:52,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 03:26:52,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:52,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 03:26:52,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:26:52,288 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 8 states. [2020-09-25 03:26:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:52,513 INFO L93 Difference]: Finished difference Result 210 states and 220 transitions. [2020-09-25 03:26:52,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 03:26:52,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-09-25 03:26:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:52,515 INFO L225 Difference]: With dead ends: 210 [2020-09-25 03:26:52,515 INFO L226 Difference]: Without dead ends: 126 [2020-09-25 03:26:52,516 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 [2020-09-25 03:26:52,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-25 03:26:52,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-09-25 03:26:52,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-25 03:26:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-09-25 03:26:52,522 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 90 [2020-09-25 03:26:52,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:52,523 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-09-25 03:26:52,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 03:26:52,523 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-09-25 03:26:52,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-25 03:26:52,524 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:52,524 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:52,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 03:26:52,525 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:52,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:52,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1019285447, now seen corresponding path program 7 times [2020-09-25 03:26:52,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:52,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395909989] [2020-09-25 03:26:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:52,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:52,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:52,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-25 03:26:52,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:52,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-09-25 03:26:52,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:52,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:26:52,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 03:26:52,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 03:26:52,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:52,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:52,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:52,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:52,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:52,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:52,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 03:26:52,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:52,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:52,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:52,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:52,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 03:26:53,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395909989] [2020-09-25 03:26:53,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:53,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 03:26:53,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381682122] [2020-09-25 03:26:53,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 03:26:53,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:53,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 03:26:53,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 03:26:53,008 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 10 states. [2020-09-25 03:26:53,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:53,272 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2020-09-25 03:26:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 03:26:53,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-09-25 03:26:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:53,274 INFO L225 Difference]: With dead ends: 217 [2020-09-25 03:26:53,275 INFO L226 Difference]: Without dead ends: 133 [2020-09-25 03:26:53,276 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 [2020-09-25 03:26:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-25 03:26:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2020-09-25 03:26:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-25 03:26:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-09-25 03:26:53,282 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 97 [2020-09-25 03:26:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:53,283 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-09-25 03:26:53,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 03:26:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-09-25 03:26:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-25 03:26:53,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:53,285 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:53,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 03:26:53,285 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1496431714, now seen corresponding path program 8 times [2020-09-25 03:26:53,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:53,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140996229] [2020-09-25 03:26:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:53,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:53,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:53,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-25 03:26:53,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:53,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-09-25 03:26:53,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:53,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 03:26:53,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 03:26:53,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 03:26:53,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:53,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:53,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:53,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:53,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:53,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:53,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:26:53,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:53,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:53,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:53,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:53,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 03:26:53,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140996229] [2020-09-25 03:26:53,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:53,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 03:26:53,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752968378] [2020-09-25 03:26:53,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 03:26:53,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:53,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 03:26:53,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 03:26:53,923 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 12 states. [2020-09-25 03:26:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:54,244 INFO L93 Difference]: Finished difference Result 219 states and 229 transitions. [2020-09-25 03:26:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 03:26:54,244 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 104 [2020-09-25 03:26:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:54,246 INFO L225 Difference]: With dead ends: 219 [2020-09-25 03:26:54,246 INFO L226 Difference]: Without dead ends: 135 [2020-09-25 03:26:54,247 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 [2020-09-25 03:26:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-25 03:26:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-09-25 03:26:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-25 03:26:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2020-09-25 03:26:54,252 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 104 [2020-09-25 03:26:54,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:54,253 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2020-09-25 03:26:54,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 03:26:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2020-09-25 03:26:54,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-25 03:26:54,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:54,254 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:54,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 03:26:54,255 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:54,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:54,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1908556953, now seen corresponding path program 9 times [2020-09-25 03:26:54,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:54,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291369695] [2020-09-25 03:26:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 03:26:54,284 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 03:26:54,284 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 03:26:54,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 03:26:54,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 03:26:54 BoogieIcfgContainer [2020-09-25 03:26:54,337 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 03:26:54,344 INFO L168 Benchmark]: Toolchain (without parser) took 12473.43 ms. Allocated memory was 138.4 MB in the beginning and 318.8 MB in the end (delta: 180.4 MB). Free memory was 101.2 MB in the beginning and 157.7 MB in the end (delta: -56.5 MB). Peak memory consumption was 123.9 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:54,347 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 03:26:54,348 INFO L168 Benchmark]: CACSL2BoogieTranslator took 390.42 ms. Allocated memory is still 138.4 MB. Free memory was 100.5 MB in the beginning and 90.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:54,352 INFO L168 Benchmark]: Boogie Preprocessor took 144.86 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 89.8 MB in the beginning and 178.5 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:54,353 INFO L168 Benchmark]: RCFGBuilder took 542.26 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 153.5 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:54,356 INFO L168 Benchmark]: TraceAbstraction took 11385.67 ms. Allocated memory was 201.3 MB in the beginning and 318.8 MB in the end (delta: 117.4 MB). Free memory was 152.9 MB in the beginning and 157.7 MB in the end (delta: -4.8 MB). Peak memory consumption was 112.7 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:54,361 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 390.42 ms. Allocated memory is still 138.4 MB. Free memory was 100.5 MB in the beginning and 90.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.86 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 89.8 MB in the beginning and 178.5 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 542.26 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 153.5 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11385.67 ms. Allocated memory was 201.3 MB in the beginning and 318.8 MB in the end (delta: 117.4 MB). Free memory was 152.9 MB in the beginning and 157.7 MB in the end (delta: -4.8 MB). Peak memory consumption was 112.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 58. Possible FailurePath: [L20] char string_A[5], string_B[5]; [L21] int i, j, nc_A, nc_B, found=0; [L24] i=0 [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND FALSE !(i<5) [L26] EXPR string_A[5 -1] [L26] COND FALSE !(!(string_A[5 -1]=='\0')) [L28] i=0 [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND FALSE !(i<5) [L30] EXPR string_B[5 -1] [L30] COND FALSE !(!(string_B[5 -1]=='\0')) [L32] nc_A = 0 [L33] EXPR string_A[nc_A] [L33] COND FALSE !(string_A[nc_A]!='\0') [L36] nc_B = 0 [L37] EXPR string_B[nc_B] [L37] COND FALSE !(string_B[nc_B]!='\0') [L40] COND FALSE !(!(nc_B >= nc_A)) [L43] EXPR j=0 [L43] i=j=0 [L44] COND FALSE !((inc_B-1)<