/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 enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:01:20,365 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 18:01:20,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:01:20,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:01:20,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:01:20,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:01:20,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:01:20,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:01:20,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:01:20,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:01:20,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:01:20,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:01:20,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:01:20,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:01:20,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:01:20,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:01:20,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:01:20,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:01:20,422 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 [2020-08-18 18:01:20,464 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:01:20,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:01:20,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:01:20,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:01:20,467 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:01:20,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:01:20,467 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:01:20,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:01:20,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:01:20,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:01:20,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:01:20,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:01:20,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:01:20,468 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:01:20,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:01:20,469 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:01:20,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:01:20,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:01:20,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:01:20,470 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:01:20,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:01:20,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:01:20,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:01:20,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:01:20,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:01:20,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:01:20,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:01:20,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:01:20,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:01:20,473 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 -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 18:01:20,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:01:20,775 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:01:20,779 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:01:20,781 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:01:20,782 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:01:20,783 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-08-18 18:01:20,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d7796fa9/dda798c6b8cf4014825b3094352fe4c6/FLAG20b236fdd [2020-08-18 18:01:21,245 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:01:21,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-08-18 18:01:21,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d7796fa9/dda798c6b8cf4014825b3094352fe4c6/FLAG20b236fdd [2020-08-18 18:01:21,647 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d7796fa9/dda798c6b8cf4014825b3094352fe4c6 [2020-08-18 18:01:21,656 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:01:21,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:01:21,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:01:21,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:01:21,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:01:21,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:01:21" (1/1) ... [2020-08-18 18:01:21,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@592ec0fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:21, skipping insertion in model container [2020-08-18 18:01:21,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:01:21" (1/1) ... [2020-08-18 18:01:21,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:01:21,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:01:21,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:01:21,866 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:01:21,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:01:21,895 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:01:21,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:21 WrapperNode [2020-08-18 18:01:21,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:01:21,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:01:21,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:01:21,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:01:21,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:21" (1/1) ... [2020-08-18 18:01:21,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:21" (1/1) ... [2020-08-18 18:01:21,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:21" (1/1) ... [2020-08-18 18:01:21,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:21" (1/1) ... [2020-08-18 18:01:21,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:21" (1/1) ... [2020-08-18 18:01:21,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:21" (1/1) ... [2020-08-18 18:01:21,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:21" (1/1) ... [2020-08-18 18:01:21,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:01:21,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:01:21,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:01:21,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:01:21,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:21" (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 [2020-08-18 18:01:22,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:01:22,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:01:22,058 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 18:01:22,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 18:01:22,059 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:01:22,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:01:22,059 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 18:01:22,059 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 18:01:22,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 18:01:22,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:01:22,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:01:22,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:01:22,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:01:22,240 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:01:22,241 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 18:01:22,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:01:22 BoogieIcfgContainer [2020-08-18 18:01:22,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:01:22,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:01:22,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:01:22,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:01:22,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:01:21" (1/3) ... [2020-08-18 18:01:22,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449c06bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:01:22, skipping insertion in model container [2020-08-18 18:01:22,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:21" (2/3) ... [2020-08-18 18:01:22,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449c06bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:01:22, skipping insertion in model container [2020-08-18 18:01:22,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:01:22" (3/3) ... [2020-08-18 18:01:22,262 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-08-18 18:01:22,272 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:01:22,279 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:01:22,293 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:01:22,314 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:01:22,314 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:01:22,314 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:01:22,314 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:01:22,314 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:01:22,314 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:01:22,315 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:01:22,315 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:01:22,329 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-18 18:01:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 18:01:22,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:01:22,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:01:22,335 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:01:22,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:01:22,341 INFO L82 PathProgramCache]: Analyzing trace with hash 508025261, now seen corresponding path program 1 times [2020-08-18 18:01:22,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:01:22,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925329311] [2020-08-18 18:01:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:01:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:22,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:01:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:01:22,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925329311] [2020-08-18 18:01:22,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:01:22,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:01:22,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998771400] [2020-08-18 18:01:22,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:01:22,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:01:22,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:01:22,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:01:22,621 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-08-18 18:01:22,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:01:22,734 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-08-18 18:01:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:01:22,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 18:01:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:01:22,746 INFO L225 Difference]: With dead ends: 46 [2020-08-18 18:01:22,746 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 18:01:22,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:01:22,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 18:01:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-18 18:01:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 18:01:22,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-08-18 18:01:22,797 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 10 [2020-08-18 18:01:22,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:01:22,798 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-08-18 18:01:22,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:01:22,798 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-08-18 18:01:22,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 18:01:22,800 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:01:22,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:01:22,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:01:22,801 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:01:22,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:01:22,801 INFO L82 PathProgramCache]: Analyzing trace with hash -133512762, now seen corresponding path program 1 times [2020-08-18 18:01:22,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:01:22,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470923927] [2020-08-18 18:01:22,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:01:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:22,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:01:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:01:22,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470923927] [2020-08-18 18:01:22,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:01:22,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 18:01:22,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44042148] [2020-08-18 18:01:22,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:01:22,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:01:22,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:01:22,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:01:22,872 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2020-08-18 18:01:22,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:01:22,951 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 18:01:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:01:22,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-08-18 18:01:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:01:22,955 INFO L225 Difference]: With dead ends: 30 [2020-08-18 18:01:22,955 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 18:01:22,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:01:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 18:01:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2020-08-18 18:01:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 18:01:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 18:01:22,962 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 18:01:22,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:01:22,963 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 18:01:22,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:01:22,963 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 18:01:22,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 18:01:22,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:01:22,964 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:01:22,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:01:22,965 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:01:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:01:22,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1022031800, now seen corresponding path program 1 times [2020-08-18 18:01:22,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:01:22,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796997557] [2020-08-18 18:01:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:01:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:23,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:01:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:23,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:01:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:01:23,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796997557] [2020-08-18 18:01:23,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:01:23,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:01:23,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889664719] [2020-08-18 18:01:23,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:01:23,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:01:23,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:01:23,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:01:23,074 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-18 18:01:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:01:23,171 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-18 18:01:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:01:23,174 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-08-18 18:01:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:01:23,175 INFO L225 Difference]: With dead ends: 31 [2020-08-18 18:01:23,175 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 18:01:23,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:01:23,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 18:01:23,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-08-18 18:01:23,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-18 18:01:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-18 18:01:23,186 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-08-18 18:01:23,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:01:23,187 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-18 18:01:23,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:01:23,187 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-18 18:01:23,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:01:23,188 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:01:23,188 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:01:23,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:01:23,189 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:01:23,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:01:23,190 INFO L82 PathProgramCache]: Analyzing trace with hash 996292415, now seen corresponding path program 1 times [2020-08-18 18:01:23,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:01:23,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119496675] [2020-08-18 18:01:23,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:01:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:23,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:01:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:23,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:01:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:01:23,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119496675] [2020-08-18 18:01:23,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:01:23,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:01:23,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478079722] [2020-08-18 18:01:23,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:01:23,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:01:23,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:01:23,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:01:23,298 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-08-18 18:01:23,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:01:23,358 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-08-18 18:01:23,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:01:23,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-18 18:01:23,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:01:23,360 INFO L225 Difference]: With dead ends: 28 [2020-08-18 18:01:23,360 INFO L226 Difference]: Without dead ends: 19 [2020-08-18 18:01:23,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:01:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-18 18:01:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-18 18:01:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-18 18:01:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-08-18 18:01:23,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 18 [2020-08-18 18:01:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:01:23,367 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-08-18 18:01:23,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:01:23,367 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-08-18 18:01:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:01:23,368 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:01:23,368 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:01:23,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:01:23,368 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:01:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:01:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1254457853, now seen corresponding path program 1 times [2020-08-18 18:01:23,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:01:23,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462321693] [2020-08-18 18:01:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:01:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:23,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:01:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:23,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 18:01:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:01:23,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462321693] [2020-08-18 18:01:23,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:01:23,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 18:01:23,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808800283] [2020-08-18 18:01:23,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:01:23,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:01:23,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:01:23,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:01:23,454 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2020-08-18 18:01:23,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:01:23,505 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-08-18 18:01:23,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:01:23,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-18 18:01:23,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:01:23,506 INFO L225 Difference]: With dead ends: 19 [2020-08-18 18:01:23,506 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:01:23,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:01:23,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:01:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:01:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:01:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:01:23,508 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-08-18 18:01:23,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:01:23,508 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:01:23,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:01:23,508 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:01:23,508 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:01:23,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:01:23,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:01:23,632 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 18:01:23,633 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:01:23,633 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:01:23,633 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 18:01:23,633 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:01:23,633 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:01:23,633 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-18 18:01:23,636 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-18 18:01:23,636 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-18 18:01:23,636 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-18 18:01:23,636 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-08-18 18:01:23,636 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 26) no Hoare annotation was computed. [2020-08-18 18:01:23,637 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-08-18 18:01:23,637 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (<= 0 main_~x~0))) (or (and .cse0 (<= main_~n~0 0) .cse1 (<= main_~x~0 0)) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) .cse1))) [2020-08-18 18:01:23,637 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-08-18 18:01:23,637 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 20) no Hoare annotation was computed. [2020-08-18 18:01:23,637 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0))) (or (and .cse0 (<= main_~m~0 main_~x~0) (<= main_~x~0 0)) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) (<= 0 main_~x~0)))) [2020-08-18 18:01:23,638 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (<= 0 main_~x~0))) (or (and .cse0 (<= main_~n~0 0) .cse1 (<= main_~x~0 0)) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) .cse1))) [2020-08-18 18:01:23,638 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 26) no Hoare annotation was computed. [2020-08-18 18:01:23,638 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-18 18:01:23,638 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-18 18:01:23,638 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 18:01:23,638 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-18 18:01:23,639 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-18 18:01:23,640 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 18:01:23,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:01:23 BoogieIcfgContainer [2020-08-18 18:01:23,659 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:01:23,662 INFO L168 Benchmark]: Toolchain (without parser) took 2002.37 ms. Allocated memory was 141.0 MB in the beginning and 232.8 MB in the end (delta: 91.8 MB). Free memory was 104.6 MB in the beginning and 180.4 MB in the end (delta: -75.8 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2020-08-18 18:01:23,663 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.2 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-18 18:01:23,664 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.01 ms. Allocated memory is still 141.0 MB. Free memory was 104.2 MB in the beginning and 94.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:01:23,665 INFO L168 Benchmark]: Boogie Preprocessor took 97.89 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 94.7 MB in the beginning and 182.3 MB in the end (delta: -87.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-18 18:01:23,665 INFO L168 Benchmark]: RCFGBuilder took 249.50 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 169.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-18 18:01:23,667 INFO L168 Benchmark]: TraceAbstraction took 1410.11 ms. Allocated memory was 203.4 MB in the beginning and 232.8 MB in the end (delta: 29.4 MB). Free memory was 168.8 MB in the beginning and 180.4 MB in the end (delta: -11.6 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-08-18 18:01:23,671 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.2 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 237.01 ms. Allocated memory is still 141.0 MB. Free memory was 104.2 MB in the beginning and 94.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 97.89 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 94.7 MB in the beginning and 182.3 MB in the end (delta: -87.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 249.50 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 169.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1410.11 ms. Allocated memory was 203.4 MB in the beginning and 232.8 MB in the end (delta: 29.4 MB). Free memory was 168.8 MB in the beginning and 180.4 MB in the end (delta: -11.6 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((0 <= m && m <= x) && x <= 0) || ((0 <= m && m + 1 <= n) && 0 <= x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 79 SDtfs, 42 SDslu, 240 SDs, 0 SdLazy, 123 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 15 PreInvPairs, 23 NumberOfFragments, 80 HoareAnnotationTreeSize, 15 FomulaSimplifications, 45 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 2367 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 7/9 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...