/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 --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 interpolation-heuristic=FIRST --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/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:30:59,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:30:59,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:30:59,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:30:59,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:30:59,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:30:59,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:30:59,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:30:59,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:30:59,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:30:59,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:30:59,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:30:59,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:30:59,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:30:59,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:30:59,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:30:59,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:30:59,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:30:59,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:30:59,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:30:59,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:30:59,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:30:59,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:30:59,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:30:59,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:30:59,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:30:59,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:30:59,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:30:59,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:30:59,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:30:59,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:30:59,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:30:59,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:30:59,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:30:59,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:30:59,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:30:59,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:30:59,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:30:59,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:30:59,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:30:59,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:30:59,436 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 [2020-09-21 11:30:59,465 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:30:59,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:30:59,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:30:59,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:30:59,468 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:30:59,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:30:59,468 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:30:59,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:30:59,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:30:59,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:30:59,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:30:59,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:30:59,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:30:59,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:30:59,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:30:59,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:30:59,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:30:59,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:30:59,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:30:59,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:30:59,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:30:59,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:30:59,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:30:59,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:30:59,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:30:59,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:30:59,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:30:59,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:30:59,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:30:59,477 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:30:59,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:30:59,971 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:30:59,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:30:59,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:30:59,977 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:30:59,978 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-21 11:31:00,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a066e60f/680f0796def244f7a77498d09a8e63ff/FLAG30c7a0f67 [2020-09-21 11:31:00,584 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:31:00,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-21 11:31:00,593 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a066e60f/680f0796def244f7a77498d09a8e63ff/FLAG30c7a0f67 [2020-09-21 11:31:00,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a066e60f/680f0796def244f7a77498d09a8e63ff [2020-09-21 11:31:00,964 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:31:00,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:31:00,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:00,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:31:00,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:31:00,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:00" (1/1) ... [2020-09-21 11:31:00,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19f6d7dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:00, skipping insertion in model container [2020-09-21 11:31:00,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:00" (1/1) ... [2020-09-21 11:31:00,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:31:01,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:31:01,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:01,252 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:31:01,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:01,284 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:31:01,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:01 WrapperNode [2020-09-21 11:31:01,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:01,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:31:01,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:31:01,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:31:01,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:01" (1/1) ... [2020-09-21 11:31:01,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:01" (1/1) ... [2020-09-21 11:31:01,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:01" (1/1) ... [2020-09-21 11:31:01,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:01" (1/1) ... [2020-09-21 11:31:01,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:01" (1/1) ... [2020-09-21 11:31:01,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:01" (1/1) ... [2020-09-21 11:31:01,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:01" (1/1) ... [2020-09-21 11:31:01,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:31:01,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:31:01,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:31:01,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:31:01,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:01" (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 [2020-09-21 11:31:01,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:31:01,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:31:01,491 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:31:01,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:31:01,492 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:31:01,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:31:01,492 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:31:01,492 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:31:01,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:31:01,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:31:01,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:31:01,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:31:01,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:31:01,707 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:31:01,707 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:31:01,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:01 BoogieIcfgContainer [2020-09-21 11:31:01,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:31:01,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:31:01,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:31:01,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:31:01,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:31:00" (1/3) ... [2020-09-21 11:31:01,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e160816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:01, skipping insertion in model container [2020-09-21 11:31:01,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:01" (2/3) ... [2020-09-21 11:31:01,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e160816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:01, skipping insertion in model container [2020-09-21 11:31:01,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:01" (3/3) ... [2020-09-21 11:31:01,722 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-09-21 11:31:01,734 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:31:01,757 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:31:01,812 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:31:01,864 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:31:01,864 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:31:01,864 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:31:01,864 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:31:01,864 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:31:01,865 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:31:01,865 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:31:01,865 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:31:01,884 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-09-21 11:31:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 11:31:01,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:01,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:01,892 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:01,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:01,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1474053726, now seen corresponding path program 1 times [2020-09-21 11:31:01,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:01,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216677783] [2020-09-21 11:31:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:02,021 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:02,021 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:02,021 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:02,022 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:02,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 11:31:02,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:02,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:31:02,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:02,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:02,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:31:02,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:02,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:02,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:02,056 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:02,056 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:02,056 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:02,056 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:02,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:02,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:02,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:02,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:02,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:02,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:02,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:02,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:02,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216677783] [2020-09-21 11:31:02,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:02,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 11:31:02,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365549773] [2020-09-21 11:31:02,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 11:31:02,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:02,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 11:31:02,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:31:02,096 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-09-21 11:31:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:02,125 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-09-21 11:31:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 11:31:02,127 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-21 11:31:02,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:02,139 INFO L225 Difference]: With dead ends: 40 [2020-09-21 11:31:02,139 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 11:31:02,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:31:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 11:31:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-21 11:31:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-21 11:31:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-09-21 11:31:02,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2020-09-21 11:31:02,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:02,192 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-09-21 11:31:02,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 11:31:02,192 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-09-21 11:31:02,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 11:31:02,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:02,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:02,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:31:02,194 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:02,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:02,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1462047953, now seen corresponding path program 1 times [2020-09-21 11:31:02,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:02,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990525535] [2020-09-21 11:31:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:02,229 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:02,229 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:02,230 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:02,230 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:02,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 11:31:02,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:02,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 11:31:02,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:02,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:02,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:02,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:31:02,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:02,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:02,267 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:02,268 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:02,268 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:02,268 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:02,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:02,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:02,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:02,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:02,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:02,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990525535] [2020-09-21 11:31:02,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:02,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:31:02,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17870583] [2020-09-21 11:31:02,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:31:02,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:02,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:31:02,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:31:02,278 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2020-09-21 11:31:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:02,307 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-09-21 11:31:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:31:02,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-21 11:31:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:02,309 INFO L225 Difference]: With dead ends: 27 [2020-09-21 11:31:02,310 INFO L226 Difference]: Without dead ends: 20 [2020-09-21 11:31:02,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:31:02,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-21 11:31:02,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-21 11:31:02,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 11:31:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-09-21 11:31:02,319 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-09-21 11:31:02,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:02,319 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-09-21 11:31:02,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:31:02,320 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-09-21 11:31:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 11:31:02,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:02,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:02,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:31:02,321 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:02,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1463775831, now seen corresponding path program 1 times [2020-09-21 11:31:02,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:02,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515092773] [2020-09-21 11:31:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:02,377 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:02,378 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:02,378 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:02,378 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:02,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 11:31:02,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:02,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 11:31:02,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:02,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:31:02,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:02,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:31:02,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:02,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:02,488 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:02,489 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:02,489 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:02,489 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:02,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:02,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:02,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:02,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:02,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:02,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:02,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:02,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:02,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515092773] [2020-09-21 11:31:02,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:02,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:31:02,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063076311] [2020-09-21 11:31:02,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:02,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:02,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:02,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:02,497 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-09-21 11:31:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:02,618 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-09-21 11:31:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:31:02,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-09-21 11:31:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:02,620 INFO L225 Difference]: With dead ends: 28 [2020-09-21 11:31:02,620 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 11:31:02,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:02,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 11:31:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-09-21 11:31:02,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 11:31:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-21 11:31:02,631 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2020-09-21 11:31:02,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:02,631 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-21 11:31:02,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:02,632 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-21 11:31:02,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 11:31:02,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:02,633 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:02,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:31:02,633 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:02,633 INFO L82 PathProgramCache]: Analyzing trace with hash -541842987, now seen corresponding path program 1 times [2020-09-21 11:31:02,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:02,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125878668] [2020-09-21 11:31:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:02,687 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:02,687 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:02,687 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:02,687 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:02,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:31:02,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:02,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-21 11:31:02,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:02,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:31:02,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:02,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 11:31:02,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:02,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:02,770 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:02,771 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:02,771 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:02,771 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:02,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:02,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:02,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:02,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:02,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:02,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:02,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:02,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:02,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 11:31:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:02,783 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:02,783 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:02,783 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:02,784 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:02,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:31:02,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:02,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:31:02,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:02,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:02,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:31:02,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:02,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125878668] [2020-09-21 11:31:02,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:02,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 11:31:02,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130649905] [2020-09-21 11:31:02,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:02,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:02,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:02,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:02,802 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-09-21 11:31:02,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:02,947 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-09-21 11:31:02,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:02,947 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-09-21 11:31:02,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:02,949 INFO L225 Difference]: With dead ends: 32 [2020-09-21 11:31:02,949 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 11:31:02,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:02,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 11:31:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-09-21 11:31:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 11:31:02,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-09-21 11:31:02,957 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2020-09-21 11:31:02,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:02,957 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-09-21 11:31:02,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:02,958 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-09-21 11:31:02,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:31:02,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:02,959 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:02,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:31:02,959 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:02,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:02,960 INFO L82 PathProgramCache]: Analyzing trace with hash 814692392, now seen corresponding path program 1 times [2020-09-21 11:31:02,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:02,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172691030] [2020-09-21 11:31:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:31:02,981 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:31:02,982 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:31:02,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:31:03,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:31:03 BoogieIcfgContainer [2020-09-21 11:31:03,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:31:03,009 INFO L168 Benchmark]: Toolchain (without parser) took 2041.85 ms. Allocated memory was 140.5 MB in the beginning and 235.4 MB in the end (delta: 94.9 MB). Free memory was 103.6 MB in the beginning and 198.6 MB in the end (delta: -95.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:31:03,010 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-21 11:31:03,011 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.98 ms. Allocated memory is still 140.5 MB. Free memory was 102.8 MB in the beginning and 92.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:03,012 INFO L168 Benchmark]: Boogie Preprocessor took 112.98 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 181.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:03,013 INFO L168 Benchmark]: RCFGBuilder took 313.63 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 168.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:03,014 INFO L168 Benchmark]: TraceAbstraction took 1292.22 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 167.3 MB in the beginning and 198.6 MB in the end (delta: -31.3 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:03,018 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 314.98 ms. Allocated memory is still 140.5 MB. Free memory was 102.8 MB in the beginning and 92.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.98 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.8 MB in the beginning and 181.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.63 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 168.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1292.22 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 167.3 MB in the beginning and 198.6 MB in the end (delta: -31.3 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i=0, x=0, y=0; [L18] int n=__VERIFIER_nondet_int(); [L19] COND FALSE !(!(n>0)) [L20] i=0 [L20] COND TRUE i