/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-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:21:03,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:21:03,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:21:03,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:21:03,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:21:03,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:21:03,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:21:03,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:21:03,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:21:03,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:21:03,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:21:03,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:21:03,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:21:03,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:21:03,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:21:03,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:21:03,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:21:03,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:21:03,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:21:03,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:21:03,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:21:03,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:21:03,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:21:03,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:21:03,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:21:03,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:21:03,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:21:03,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:21:03,568 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 21:21:03,583 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:21:03,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:21:03,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:21:03,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:21:03,584 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:21:03,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:21:03,585 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:21:03,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:21:03,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:21:03,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:21:03,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:21:03,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:21:03,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:21:03,587 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:21:03,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:21:03,587 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:21:03,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:21:03,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:21:03,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:21:03,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:21:03,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:21:03,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:21:03,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:21:03,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:21:03,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:21:03,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:21:03,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:21:03,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:21:03,590 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:21:03,869 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:21:03,881 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:21:03,884 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:21:03,886 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:21:03,886 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:21:03,887 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2019-11-06 21:21:03,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97fe3c12/1f1117b8707840a58349eb9856384422/FLAGa08538039 [2019-11-06 21:21:04,393 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:21:04,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2019-11-06 21:21:04,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97fe3c12/1f1117b8707840a58349eb9856384422/FLAGa08538039 [2019-11-06 21:21:04,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97fe3c12/1f1117b8707840a58349eb9856384422 [2019-11-06 21:21:04,825 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:21:04,827 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:21:04,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:21:04,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:21:04,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:21:04,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:21:04" (1/1) ... [2019-11-06 21:21:04,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e89fa84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:04, skipping insertion in model container [2019-11-06 21:21:04,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:21:04" (1/1) ... [2019-11-06 21:21:04,844 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:21:04,863 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:21:05,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:21:05,087 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:21:05,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:21:05,124 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:21:05,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:05 WrapperNode [2019-11-06 21:21:05,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:21:05,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:21:05,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:21:05,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:21:05,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:05" (1/1) ... [2019-11-06 21:21:05,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:05" (1/1) ... [2019-11-06 21:21:05,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:05" (1/1) ... [2019-11-06 21:21:05,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:05" (1/1) ... [2019-11-06 21:21:05,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:05" (1/1) ... [2019-11-06 21:21:05,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:05" (1/1) ... [2019-11-06 21:21:05,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:05" (1/1) ... [2019-11-06 21:21:05,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:21:05,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:21:05,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:21:05,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:21:05,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-11-06 21:21:05,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:21:05,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:21:05,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:21:05,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:21:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:21:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:21:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:21:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:21:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:21:05,514 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:21:05,514 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:21:05,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:21:05 BoogieIcfgContainer [2019-11-06 21:21:05,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:21:05,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:21:05,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:21:05,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:21:05,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:21:04" (1/3) ... [2019-11-06 21:21:05,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29cd296f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:21:05, skipping insertion in model container [2019-11-06 21:21:05,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:05" (2/3) ... [2019-11-06 21:21:05,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29cd296f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:21:05, skipping insertion in model container [2019-11-06 21:21:05,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:21:05" (3/3) ... [2019-11-06 21:21:05,524 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2019-11-06 21:21:05,532 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:21:05,539 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:21:05,551 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:21:05,581 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:21:05,581 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:21:05,581 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:21:05,582 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:21:05,582 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:21:05,582 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:21:05,582 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:21:05,582 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:21:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-06 21:21:05,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:21:05,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:05,603 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:05,604 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:05,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-11-06 21:21:05,616 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:05,616 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355759275] [2019-11-06 21:21:05,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:05,860 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-11-06 21:21:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:05,869 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355759275] [2019-11-06 21:21:05,870 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:21:05,871 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 21:21:05,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528820375] [2019-11-06 21:21:05,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 21:21:05,879 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:21:05,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 21:21:05,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:21:05,899 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-11-06 21:21:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:21:05,933 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-11-06 21:21:05,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:21:05,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-06 21:21:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:21:05,944 INFO L225 Difference]: With dead ends: 29 [2019-11-06 21:21:05,944 INFO L226 Difference]: Without dead ends: 12 [2019-11-06 21:21:05,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:21:05,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-06 21:21:05,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-06 21:21:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-06 21:21:05,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-06 21:21:05,982 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-11-06 21:21:05,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:21:05,982 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-06 21:21:05,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 21:21:05,982 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-06 21:21:05,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-06 21:21:05,983 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:05,983 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:05,984 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:05,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-11-06 21:21:05,985 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:05,985 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609188049] [2019-11-06 21:21:05,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:06,097 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609188049] [2019-11-06 21:21:06,097 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927829300] [2019-11-06 21:21:06,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2019-11-06 21:21:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:06,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 21:21:06,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:21:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:06,196 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:21:06,197 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-06 21:21:06,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886003803] [2019-11-06 21:21:06,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:21:06,199 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:21:06,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:21:06,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:21:06,200 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2019-11-06 21:21:06,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:21:06,220 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-11-06 21:21:06,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 21:21:06,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-06 21:21:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:21:06,221 INFO L225 Difference]: With dead ends: 18 [2019-11-06 21:21:06,221 INFO L226 Difference]: Without dead ends: 13 [2019-11-06 21:21:06,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:21:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-06 21:21:06,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-06 21:21:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-06 21:21:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-06 21:21:06,228 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-11-06 21:21:06,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:21:06,229 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-06 21:21:06,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:21:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-06 21:21:06,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-06 21:21:06,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:06,230 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:06,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:06,434 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:06,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:06,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2019-11-06 21:21:06,436 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:06,436 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872216508] [2019-11-06 21:21:06,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:06,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872216508] [2019-11-06 21:21:06,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171835997] [2019-11-06 21:21:06,569 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:06,607 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:21:06,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:21:06,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 21:21:06,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:21:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:06,639 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:21:06,639 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-06 21:21:06,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788981637] [2019-11-06 21:21:06,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:21:06,641 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:21:06,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:21:06,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:21:06,642 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-11-06 21:21:06,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:21:06,670 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-06 21:21:06,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:21:06,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-06 21:21:06,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:21:06,672 INFO L225 Difference]: With dead ends: 19 [2019-11-06 21:21:06,672 INFO L226 Difference]: Without dead ends: 14 [2019-11-06 21:21:06,673 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:21:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-06 21:21:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-06 21:21:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-06 21:21:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-11-06 21:21:06,678 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-11-06 21:21:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:21:06,679 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-11-06 21:21:06,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:21:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-11-06 21:21:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-06 21:21:06,680 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:06,680 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:06,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:06,882 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:06,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:06,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2019-11-06 21:21:06,883 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:06,884 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302022348] [2019-11-06 21:21:06,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:07,012 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302022348] [2019-11-06 21:21:07,013 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486953919] [2019-11-06 21:21:07,013 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:07,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 21:21:07,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:21:07,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 21:21:07,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:21:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:07,079 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:21:07,079 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-06 21:21:07,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240508244] [2019-11-06 21:21:07,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:21:07,081 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:21:07,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:21:07,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:21:07,081 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2019-11-06 21:21:07,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:21:07,119 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-06 21:21:07,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:21:07,119 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-11-06 21:21:07,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:21:07,120 INFO L225 Difference]: With dead ends: 20 [2019-11-06 21:21:07,120 INFO L226 Difference]: Without dead ends: 15 [2019-11-06 21:21:07,121 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:21:07,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-06 21:21:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-06 21:21:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-06 21:21:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-06 21:21:07,126 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-11-06 21:21:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:21:07,126 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-06 21:21:07,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:21:07,127 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-06 21:21:07,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 21:21:07,127 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:07,128 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:07,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:07,331 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:07,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:07,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2019-11-06 21:21:07,333 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:07,333 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939350447] [2019-11-06 21:21:07,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:07,496 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939350447] [2019-11-06 21:21:07,497 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256265087] [2019-11-06 21:21:07,497 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:07,523 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:21:07,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:21:07,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 21:21:07,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:21:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:07,557 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:21:07,557 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-06 21:21:07,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234908457] [2019-11-06 21:21:07,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:21:07,559 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:21:07,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:21:07,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:21:07,560 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2019-11-06 21:21:07,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:21:07,625 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-11-06 21:21:07,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:21:07,627 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-06 21:21:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:21:07,627 INFO L225 Difference]: With dead ends: 21 [2019-11-06 21:21:07,628 INFO L226 Difference]: Without dead ends: 16 [2019-11-06 21:21:07,628 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:21:07,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-06 21:21:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-06 21:21:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-06 21:21:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-06 21:21:07,636 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-11-06 21:21:07,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:21:07,636 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-06 21:21:07,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:21:07,636 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-06 21:21:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 21:21:07,639 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:07,639 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:07,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:07,840 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:07,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2019-11-06 21:21:07,841 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:07,842 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158419996] [2019-11-06 21:21:07,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:08,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158419996] [2019-11-06 21:21:08,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925345912] [2019-11-06 21:21:08,008 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:08,050 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 21:21:08,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:21:08,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 21:21:08,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:21:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:08,098 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:21:08,098 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-06 21:21:08,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282284783] [2019-11-06 21:21:08,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:21:08,099 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:21:08,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:21:08,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:21:08,100 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2019-11-06 21:21:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:21:08,157 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-11-06 21:21:08,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:21:08,158 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-11-06 21:21:08,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:21:08,158 INFO L225 Difference]: With dead ends: 22 [2019-11-06 21:21:08,159 INFO L226 Difference]: Without dead ends: 17 [2019-11-06 21:21:08,159 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:21:08,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-06 21:21:08,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-06 21:21:08,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-06 21:21:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-06 21:21:08,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-11-06 21:21:08,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:21:08,164 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-06 21:21:08,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:21:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-06 21:21:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 21:21:08,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:08,165 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:08,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:08,369 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:08,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:08,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2019-11-06 21:21:08,370 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:08,371 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137094676] [2019-11-06 21:21:08,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-06 21:21:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-06 21:21:08,421 INFO L172 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-06 21:21:08,421 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-06 21:21:08,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:21:08 BoogieIcfgContainer [2019-11-06 21:21:08,445 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-06 21:21:08,447 INFO L168 Benchmark]: Toolchain (without parser) took 3619.99 ms. Allocated memory was 139.5 MB in the beginning and 233.8 MB in the end (delta: 94.4 MB). Free memory was 102.9 MB in the beginning and 154.2 MB in the end (delta: -51.2 MB). Peak memory consumption was 43.1 MB. Max. memory is 7.1 GB. [2019-11-06 21:21:08,448 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-11-06 21:21:08,449 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.33 ms. Allocated memory is still 139.5 MB. Free memory was 102.7 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-11-06 21:21:08,450 INFO L168 Benchmark]: Boogie Preprocessor took 164.69 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 181.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2019-11-06 21:21:08,451 INFO L168 Benchmark]: RCFGBuilder took 224.50 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 170.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2019-11-06 21:21:08,452 INFO L168 Benchmark]: TraceAbstraction took 2928.57 ms. Allocated memory was 202.9 MB in the beginning and 233.8 MB in the end (delta: 30.9 MB). Free memory was 170.4 MB in the beginning and 154.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 47.2 MB. Max. memory is 7.1 GB. [2019-11-06 21:21:08,456 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.33 ms. Allocated memory is still 139.5 MB. Free memory was 102.7 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 164.69 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 181.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 224.50 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 170.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2928.57 ms. Allocated memory was 202.9 MB in the beginning and 233.8 MB in the end (delta: 30.9 MB). Free memory was 170.4 MB in the beginning and 154.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 47.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; VAL [x=0, y=1] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=1, y=2] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=2, y=4] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=3, y=8] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=4, y=16] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=5, y=32] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=6, y=64] [L14] COND FALSE !(x < 6) VAL [x=6, y=64] [L19] CALL __VERIFIER_assert(y != 64) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.8s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 0 SDslu, 190 SDs, 0 SdLazy, 137 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 4835 SizeOfPredicates, 5 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...