/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:44:08,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:44:08,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:44:08,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 05:44:08,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:44:08,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:44:08,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:44:08,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:44:08,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:44:08,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:44:08,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:44:08,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:44:08,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:44:08,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:44:08,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:44:08,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:44:08,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 05:44:08,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:44:08,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:44:08,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:44:08,351 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 [2020-07-20 05:44:08,365 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:44:08,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:44:08,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:44:08,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:44:08,367 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:44:08,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:44:08,367 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:44:08,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:44:08,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:44:08,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:44:08,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:44:08,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:44:08,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:44:08,369 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:44:08,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:44:08,369 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:44:08,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:44:08,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:44:08,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:44:08,370 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:44:08,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:44:08,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:44:08,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:44:08,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:44:08,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:44:08,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:44:08,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:44:08,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:44:08,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:44:08,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 05:44:08,644 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:44:08,658 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:44:08,661 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:44:08,663 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:44:08,664 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:44:08,664 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-07-20 05:44:08,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1cbce972/9a81d07800d54c77ab915062d161e830/FLAG1075334db [2020-07-20 05:44:09,192 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:44:09,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-07-20 05:44:09,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1cbce972/9a81d07800d54c77ab915062d161e830/FLAG1075334db [2020-07-20 05:44:09,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1cbce972/9a81d07800d54c77ab915062d161e830 [2020-07-20 05:44:09,625 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:44:09,627 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:44:09,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:44:09,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:44:09,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:44:09,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:44:09" (1/1) ... [2020-07-20 05:44:09,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d374f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:09, skipping insertion in model container [2020-07-20 05:44:09,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:44:09" (1/1) ... [2020-07-20 05:44:09,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:44:09,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:44:09,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:44:09,871 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:44:09,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:44:09,904 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:44:09,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:09 WrapperNode [2020-07-20 05:44:09,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:44:09,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:44:09,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:44:09,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:44:09,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:09" (1/1) ... [2020-07-20 05:44:09,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:09" (1/1) ... [2020-07-20 05:44:09,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:09" (1/1) ... [2020-07-20 05:44:09,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:09" (1/1) ... [2020-07-20 05:44:09,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:09" (1/1) ... [2020-07-20 05:44:09,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:09" (1/1) ... [2020-07-20 05:44:09,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:09" (1/1) ... [2020-07-20 05:44:09,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:44:09,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:44:09,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:44:09,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:44:09,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:09" (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 [2020-07-20 05:44:10,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:44:10,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:44:10,085 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-20 05:44:10,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:44:10,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 05:44:10,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:44:10,086 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-20 05:44:10,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:44:10,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:44:10,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:44:10,277 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:44:10,278 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 05:44:10,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:44:10 BoogieIcfgContainer [2020-07-20 05:44:10,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:44:10,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:44:10,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:44:10,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:44:10,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:44:09" (1/3) ... [2020-07-20 05:44:10,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118a854e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:44:10, skipping insertion in model container [2020-07-20 05:44:10,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:09" (2/3) ... [2020-07-20 05:44:10,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118a854e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:44:10, skipping insertion in model container [2020-07-20 05:44:10,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:44:10" (3/3) ... [2020-07-20 05:44:10,289 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b5_o10-2.c [2020-07-20 05:44:10,300 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:44:10,307 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:44:10,322 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:44:10,363 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:44:10,363 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:44:10,363 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:44:10,364 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:44:10,364 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:44:10,364 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:44:10,365 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:44:10,365 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:44:10,390 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-20 05:44:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 05:44:10,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:10,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:10,402 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:10,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2020-07-20 05:44:10,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:10,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187715389] [2020-07-20 05:44:10,424 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@791e8d17 [2020-07-20 05:44:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:44:10,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187715389] [2020-07-20 05:44:10,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:44:10,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 05:44:10,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268378943] [2020-07-20 05:44:10,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 05:44:10,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:10,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 05:44:10,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 05:44:10,716 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-20 05:44:10,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:10,773 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-20 05:44:10,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 05:44:10,775 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 05:44:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:10,783 INFO L225 Difference]: With dead ends: 33 [2020-07-20 05:44:10,783 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 05:44:10,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 05:44:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 05:44:10,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 05:44:10,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 05:44:10,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-07-20 05:44:10,829 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-07-20 05:44:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:10,830 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-07-20 05:44:10,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 05:44:10,830 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-07-20 05:44:10,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 05:44:10,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:10,832 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:10,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:44:10,833 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:10,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:10,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2020-07-20 05:44:10,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:10,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291948666] [2020-07-20 05:44:10,835 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@791e8d17 [2020-07-20 05:44:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 05:44:11,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291948666] [2020-07-20 05:44:11,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:44:11,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 05:44:11,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874105032] [2020-07-20 05:44:11,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 05:44:11,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:11,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 05:44:11,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 05:44:11,044 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2020-07-20 05:44:11,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:11,073 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-20 05:44:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 05:44:11,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-20 05:44:11,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:11,075 INFO L225 Difference]: With dead ends: 31 [2020-07-20 05:44:11,075 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 05:44:11,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 05:44:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 05:44:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 05:44:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 05:44:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-20 05:44:11,084 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2020-07-20 05:44:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:11,085 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-20 05:44:11,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 05:44:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-20 05:44:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 05:44:11,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:11,087 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:11,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 05:44:11,087 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:11,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:11,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1923365706, now seen corresponding path program 1 times [2020-07-20 05:44:11,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:11,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289304556] [2020-07-20 05:44:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@791e8d17 [2020-07-20 05:44:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 05:44:11,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289304556] [2020-07-20 05:44:11,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926341310] [2020-07-20 05:44:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c903a5e 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 [2020-07-20 05:44:11,287 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c903a5e issued 4 check-sat command(s) [2020-07-20 05:44:11,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:11,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 05:44:11,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 05:44:11,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:11,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-20 05:44:11,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303469782] [2020-07-20 05:44:11,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 05:44:11,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 05:44:11,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-20 05:44:11,398 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2020-07-20 05:44:11,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:11,455 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-07-20 05:44:11,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 05:44:11,456 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-07-20 05:44:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:11,458 INFO L225 Difference]: With dead ends: 27 [2020-07-20 05:44:11,458 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 05:44:11,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:44:11,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 05:44:11,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 05:44:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 05:44:11,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-20 05:44:11,465 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-07-20 05:44:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:11,466 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-20 05:44:11,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 05:44:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-20 05:44:11,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 05:44:11,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:11,468 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:11,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 05:44:11,683 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:11,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:11,684 INFO L82 PathProgramCache]: Analyzing trace with hash 376843494, now seen corresponding path program 1 times [2020-07-20 05:44:11,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:11,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041326401] [2020-07-20 05:44:11,685 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@791e8d17 [2020-07-20 05:44:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 05:44:11,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041326401] [2020-07-20 05:44:11,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664258868] [2020-07-20 05:44:11,949 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@734fe8da No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:11,994 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@734fe8da issued 4 check-sat command(s) [2020-07-20 05:44:11,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:11,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 05:44:11,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 05:44:12,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:12,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-20 05:44:12,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442525832] [2020-07-20 05:44:12,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 05:44:12,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:12,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 05:44:12,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-20 05:44:12,037 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-07-20 05:44:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:12,079 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-07-20 05:44:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 05:44:12,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 05:44:12,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:12,081 INFO L225 Difference]: With dead ends: 35 [2020-07-20 05:44:12,081 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 05:44:12,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:44:12,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 05:44:12,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-20 05:44:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 05:44:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-20 05:44:12,089 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 27 [2020-07-20 05:44:12,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:12,089 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-20 05:44:12,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 05:44:12,089 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-20 05:44:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 05:44:12,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:12,091 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:12,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:12,304 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:12,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:12,305 INFO L82 PathProgramCache]: Analyzing trace with hash 405472645, now seen corresponding path program 2 times [2020-07-20 05:44:12,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:12,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936446614] [2020-07-20 05:44:12,307 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@791e8d17 [2020-07-20 05:44:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 05:44:12,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936446614] [2020-07-20 05:44:12,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578155669] [2020-07-20 05:44:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37489589 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 [2020-07-20 05:44:12,499 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37489589 issued 4 check-sat command(s) [2020-07-20 05:44:12,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:12,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 05:44:12,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 05:44:12,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:12,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-20 05:44:12,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132352616] [2020-07-20 05:44:12,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 05:44:12,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:12,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 05:44:12,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-07-20 05:44:12,544 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 13 states. [2020-07-20 05:44:12,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:12,606 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-07-20 05:44:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 05:44:12,606 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-07-20 05:44:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:12,608 INFO L225 Difference]: With dead ends: 31 [2020-07-20 05:44:12,608 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 05:44:12,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:44:12,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 05:44:12,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 05:44:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 05:44:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-20 05:44:12,614 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 27 [2020-07-20 05:44:12,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:12,615 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-20 05:44:12,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 05:44:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-20 05:44:12,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 05:44:12,616 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:12,617 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:12,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:12,823 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:12,824 INFO L82 PathProgramCache]: Analyzing trace with hash -645661089, now seen corresponding path program 2 times [2020-07-20 05:44:12,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:12,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408924914] [2020-07-20 05:44:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@791e8d17 [2020-07-20 05:44:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-20 05:44:12,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408924914] [2020-07-20 05:44:12,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:44:12,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 05:44:12,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543189891] [2020-07-20 05:44:12,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 05:44:12,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:12,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 05:44:12,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 05:44:12,904 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2020-07-20 05:44:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:12,914 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-07-20 05:44:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 05:44:12,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-07-20 05:44:12,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:12,915 INFO L225 Difference]: With dead ends: 27 [2020-07-20 05:44:12,915 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 05:44:12,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 05:44:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 05:44:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 05:44:12,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 05:44:12,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 05:44:12,917 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-07-20 05:44:12,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:12,917 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 05:44:12,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 05:44:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 05:44:12,918 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 05:44:12,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 05:44:12,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 05:44:12,949 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 05:44:12,949 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:44:12,949 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:44:12,949 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 05:44:12,950 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 05:44:12,950 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 05:44:12,950 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-07-20 05:44:12,950 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-07-20 05:44:12,950 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-07-20 05:44:12,950 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-07-20 05:44:12,951 INFO L268 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-07-20 05:44:12,951 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-07-20 05:44:12,951 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-20 05:44:12,951 INFO L268 CegarLoopResult]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2020-07-20 05:44:12,951 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2020-07-20 05:44:12,951 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2020-07-20 05:44:12,951 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2020-07-20 05:44:12,951 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-20 05:44:12,952 INFO L271 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: true [2020-07-20 05:44:12,952 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 05:44:12,952 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-20 05:44:12,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:44:12 BoogieIcfgContainer [2020-07-20 05:44:12,959 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 05:44:12,962 INFO L168 Benchmark]: Toolchain (without parser) took 3334.42 ms. Allocated memory was 138.4 MB in the beginning and 235.9 MB in the end (delta: 97.5 MB). Free memory was 103.5 MB in the beginning and 128.7 MB in the end (delta: -25.2 MB). Peak memory consumption was 72.3 MB. Max. memory is 7.1 GB. [2020-07-20 05:44:12,963 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 05:44:12,964 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.92 ms. Allocated memory is still 138.4 MB. Free memory was 103.5 MB in the beginning and 93.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 05:44:12,965 INFO L168 Benchmark]: Boogie Preprocessor took 31.53 ms. Allocated memory is still 138.4 MB. Free memory was 93.9 MB in the beginning and 92.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 05:44:12,966 INFO L168 Benchmark]: RCFGBuilder took 343.80 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 92.2 MB in the beginning and 170.2 MB in the end (delta: -77.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-20 05:44:12,967 INFO L168 Benchmark]: TraceAbstraction took 2676.39 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 169.2 MB in the beginning and 128.7 MB in the end (delta: 40.5 MB). Peak memory consumption was 73.5 MB. Max. memory is 7.1 GB. [2020-07-20 05:44:12,970 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.92 ms. Allocated memory is still 138.4 MB. Free memory was 103.5 MB in the beginning and 93.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.53 ms. Allocated memory is still 138.4 MB. Free memory was 93.9 MB in the beginning and 92.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 343.80 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 92.2 MB in the beginning and 170.2 MB in the end (delta: -77.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2676.39 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 169.2 MB in the beginning and 128.7 MB in the end (delta: 40.5 MB). Peak memory consumption was 73.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 111 SDtfs, 18 SDslu, 474 SDs, 0 SdLazy, 107 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=5, 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, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 215 NumberOfCodeBlocks, 215 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 206 ConstructedInterpolants, 0 QuantifiedInterpolants, 9016 SizeOfPredicates, 7 NumberOfNonLiveVariables, 187 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 77/105 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...