/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:44:14,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:44:14,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:44:14,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:44:14,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:44:14,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:44:14,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:44:14,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:44:14,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:44:14,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:44:14,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:44:14,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:44:14,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:44:14,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:44:14,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:44:14,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:44:14,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:44:14,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:44:14,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:44:14,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:44:14,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:44:14,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:44:14,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:44:14,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:44:14,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:44:14,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:44:14,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:44:14,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:44:14,896 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 [2020-09-04 13:44:14,923 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:44:14,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:44:14,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:44:14,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:44:14,925 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:44:14,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:44:14,925 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:44:14,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:44:14,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:44:14,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:44:14,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:44:14,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:44:14,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:44:14,927 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:44:14,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:44:14,927 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:44:14,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:44:14,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:44:14,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:44:14,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:44:14,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:44:14,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:44:14,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:44:14,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:44:14,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:44:14,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:44:14,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:44:14,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:44:14,930 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:44:14,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:44:15,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:44:15,442 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:44:15,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:44:15,448 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:44:15,448 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:44:15,450 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-09-04 13:44:15,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a00b4aa04/53361c6d6eec4ef4bf5b81288d1d66d8/FLAG124bdcdd4 [2020-09-04 13:44:16,064 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:44:16,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-09-04 13:44:16,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a00b4aa04/53361c6d6eec4ef4bf5b81288d1d66d8/FLAG124bdcdd4 [2020-09-04 13:44:16,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a00b4aa04/53361c6d6eec4ef4bf5b81288d1d66d8 [2020-09-04 13:44:16,437 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:44:16,439 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:44:16,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:44:16,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:44:16,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:44:16,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:44:16" (1/1) ... [2020-09-04 13:44:16,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74dd283d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:16, skipping insertion in model container [2020-09-04 13:44:16,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:44:16" (1/1) ... [2020-09-04 13:44:16,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:44:16,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:44:16,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:44:16,751 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:44:16,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:44:16,797 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:44:16,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:16 WrapperNode [2020-09-04 13:44:16,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:44:16,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:44:16,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:44:16,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:44:16,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:16" (1/1) ... [2020-09-04 13:44:16,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:16" (1/1) ... [2020-09-04 13:44:16,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:16" (1/1) ... [2020-09-04 13:44:16,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:16" (1/1) ... [2020-09-04 13:44:16,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:16" (1/1) ... [2020-09-04 13:44:16,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:16" (1/1) ... [2020-09-04 13:44:16,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:16" (1/1) ... [2020-09-04 13:44:16,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:44:16,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:44:16,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:44:16,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:44:16,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:16" (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 [2020-09-04 13:44:17,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:44:17,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:44:17,049 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:44:17,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:44:17,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:44:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:44:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:44:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:44:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:44:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:44:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:44:17,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:44:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:44:17,286 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:44:17,287 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 13:44:17,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:44:17 BoogieIcfgContainer [2020-09-04 13:44:17,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:44:17,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:44:17,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:44:17,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:44:17,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:44:16" (1/3) ... [2020-09-04 13:44:17,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189bbebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:44:17, skipping insertion in model container [2020-09-04 13:44:17,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:16" (2/3) ... [2020-09-04 13:44:17,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189bbebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:44:17, skipping insertion in model container [2020-09-04 13:44:17,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:44:17" (3/3) ... [2020-09-04 13:44:17,303 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-09-04 13:44:17,315 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:44:17,326 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:44:17,357 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:44:17,393 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:44:17,394 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:44:17,394 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:44:17,394 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:44:17,394 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:44:17,394 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:44:17,394 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:44:17,395 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:44:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-09-04 13:44:17,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-04 13:44:17,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:17,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:17,442 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:17,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:17,450 INFO L82 PathProgramCache]: Analyzing trace with hash 508025261, now seen corresponding path program 1 times [2020-09-04 13:44:17,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:17,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644530397] [2020-09-04 13:44:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:17,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:17,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644530397] [2020-09-04 13:44:17,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:44:17,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:44:17,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79255050] [2020-09-04 13:44:17,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:44:17,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:17,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:44:17,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:44:17,749 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-09-04 13:44:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:17,862 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-09-04 13:44:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:44:17,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-09-04 13:44:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:17,882 INFO L225 Difference]: With dead ends: 46 [2020-09-04 13:44:17,883 INFO L226 Difference]: Without dead ends: 25 [2020-09-04 13:44:17,896 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 [2020-09-04 13:44:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-04 13:44:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-09-04 13:44:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 13:44:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-09-04 13:44:17,956 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 10 [2020-09-04 13:44:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:17,956 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-09-04 13:44:17,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:44:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-09-04 13:44:17,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:44:17,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:17,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:17,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:44:17,959 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:17,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:17,960 INFO L82 PathProgramCache]: Analyzing trace with hash -133512762, now seen corresponding path program 1 times [2020-09-04 13:44:17,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:17,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563960901] [2020-09-04 13:44:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:18,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:18,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563960901] [2020-09-04 13:44:18,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543059631] [2020-09-04 13:44:18,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:44:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:18,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-04 13:44:18,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:44:18,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:44:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:18,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:44:18,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-09-04 13:44:18,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572970861] [2020-09-04 13:44:18,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:44:18,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:18,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:44:18,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:44:18,240 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2020-09-04 13:44:18,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:18,354 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-09-04 13:44:18,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:44:18,356 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-09-04 13:44:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:18,360 INFO L225 Difference]: With dead ends: 30 [2020-09-04 13:44:18,360 INFO L226 Difference]: Without dead ends: 26 [2020-09-04 13:44:18,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:44:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-04 13:44:18,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2020-09-04 13:44:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-04 13:44:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-04 13:44:18,377 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-04 13:44:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:18,378 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-04 13:44:18,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:44:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-04 13:44:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 13:44:18,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:18,380 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:18,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:44:18,589 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:18,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1022031800, now seen corresponding path program 1 times [2020-09-04 13:44:18,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:18,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908804299] [2020-09-04 13:44:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:18,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:18,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:44:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:18,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908804299] [2020-09-04 13:44:18,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:44:18,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 13:44:18,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28240637] [2020-09-04 13:44:18,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:44:18,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:18,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:44:18,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:44:18,670 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-09-04 13:44:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:18,771 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-09-04 13:44:18,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:44:18,772 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-09-04 13:44:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:18,773 INFO L225 Difference]: With dead ends: 31 [2020-09-04 13:44:18,773 INFO L226 Difference]: Without dead ends: 21 [2020-09-04 13:44:18,775 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 [2020-09-04 13:44:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-04 13:44:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-09-04 13:44:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-04 13:44:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-09-04 13:44:18,784 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-09-04 13:44:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:18,787 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-09-04 13:44:18,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:44:18,788 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-09-04 13:44:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-04 13:44:18,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:18,789 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:18,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 13:44:18,789 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:18,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:18,790 INFO L82 PathProgramCache]: Analyzing trace with hash 996292415, now seen corresponding path program 1 times [2020-09-04 13:44:18,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:18,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229754421] [2020-09-04 13:44:18,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:18,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:18,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:44:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:18,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229754421] [2020-09-04 13:44:18,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:44:18,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 13:44:18,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240628618] [2020-09-04 13:44:18,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:44:18,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:18,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:44:18,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:44:18,926 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-09-04 13:44:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:18,991 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-09-04 13:44:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:44:18,992 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-04 13:44:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:18,993 INFO L225 Difference]: With dead ends: 28 [2020-09-04 13:44:18,993 INFO L226 Difference]: Without dead ends: 19 [2020-09-04 13:44:18,994 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 [2020-09-04 13:44:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-04 13:44:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-04 13:44:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-04 13:44:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-09-04 13:44:19,000 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 18 [2020-09-04 13:44:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:19,001 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-09-04 13:44:19,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:44:19,001 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-09-04 13:44:19,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-04 13:44:19,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:19,019 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:19,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 13:44:19,019 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:19,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:19,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1254457853, now seen corresponding path program 1 times [2020-09-04 13:44:19,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:19,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027141327] [2020-09-04 13:44:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:19,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:19,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:44:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:19,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027141327] [2020-09-04 13:44:19,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408899057] [2020-09-04 13:44:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-09-04 13:44:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:19,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:44:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:44:19,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:44:19,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:44:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:19,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:44:19,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-09-04 13:44:19,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457001701] [2020-09-04 13:44:19,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:44:19,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:19,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:44:19,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:44:19,210 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-09-04 13:44:19,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:19,259 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-09-04 13:44:19,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:44:19,259 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-09-04 13:44:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:19,260 INFO L225 Difference]: With dead ends: 19 [2020-09-04 13:44:19,260 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:44:19,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:44:19,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:44:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:44:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:44:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:44:19,262 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-09-04 13:44:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:19,262 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:44:19,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:44:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:44:19,263 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:44:19,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:44:19,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:44:19,707 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:44:19,708 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:44:19,708 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:44:19,708 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:44:19,708 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:44:19,709 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:44:19,709 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-04 13:44:19,709 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-04 13:44:19,709 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-09-04 13:44:19,709 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-04 13:44:19,710 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-09-04 13:44:19,713 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 26) no Hoare annotation was computed. [2020-09-04 13:44:19,713 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-09-04 13:44:19,713 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))) [2020-09-04 13:44:19,714 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-09-04 13:44:19,714 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 20) no Hoare annotation was computed. [2020-09-04 13:44:19,714 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (<= 0 main_~x~0))) (or (and .cse0 .cse1 (<= main_~m~0 0) (<= main_~x~0 0)) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) .cse1))) [2020-09-04 13:44:19,714 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))) [2020-09-04 13:44:19,715 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 26) no Hoare annotation was computed. [2020-09-04 13:44:19,715 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-04 13:44:19,715 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-04 13:44:19,716 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-04 13:44:19,716 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-04 13:44:19,716 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-04 13:44:19,716 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-04 13:44:19,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:44:19 BoogieIcfgContainer [2020-09-04 13:44:19,745 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:44:19,751 INFO L168 Benchmark]: Toolchain (without parser) took 3307.82 ms. Allocated memory was 138.9 MB in the beginning and 235.9 MB in the end (delta: 97.0 MB). Free memory was 101.5 MB in the beginning and 155.3 MB in the end (delta: -53.8 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 GB. [2020-09-04 13:44:19,755 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:44:19,757 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.59 ms. Allocated memory is still 138.9 MB. Free memory was 101.1 MB in the beginning and 91.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:44:19,769 INFO L168 Benchmark]: Boogie Preprocessor took 164.09 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 91.4 MB in the beginning and 184.0 MB in the end (delta: -92.6 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:44:19,771 INFO L168 Benchmark]: RCFGBuilder took 327.94 ms. Allocated memory is still 203.9 MB. Free memory was 184.0 MB in the beginning and 170.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-04 13:44:19,772 INFO L168 Benchmark]: TraceAbstraction took 2451.35 ms. Allocated memory was 203.9 MB in the beginning and 235.9 MB in the end (delta: 32.0 MB). Free memory was 170.2 MB in the beginning and 155.3 MB in the end (delta: 14.8 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:44:19,779 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 358.59 ms. Allocated memory is still 138.9 MB. Free memory was 101.1 MB in the beginning and 91.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 164.09 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 91.4 MB in the beginning and 184.0 MB in the end (delta: -92.6 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 327.94 ms. Allocated memory is still 203.9 MB. Free memory was 184.0 MB in the beginning and 170.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2451.35 ms. Allocated memory was 203.9 MB in the beginning and 235.9 MB in the end (delta: 32.0 MB). Free memory was 170.2 MB in the beginning and 155.3 MB in the end (delta: 14.8 MB). Peak memory consumption was 46.8 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 && 0 <= x) && m <= 0) && 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: 2.0s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 79 SDtfs, 48 SDslu, 260 SDs, 0 SdLazy, 128 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s 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, 83 HoareAnnotationTreeSize, 15 FomulaSimplifications, 27 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 81 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 3648 SizeOfPredicates, 6 NumberOfNonLiveVariables, 80 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 9/13 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...