/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 22:06:55,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 22:06:55,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 22:06:55,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-09-04 22:06:55,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 22:06:55,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 22:06:55,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 22:06:55,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 22:06:55,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 22:06:55,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 22:06:55,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 22:06:55,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 22:06:55,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 22:06:55,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 22:06:55,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 22:06:55,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 22:06:55,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 22:06:55,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 22:06:55,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 22:06:55,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 22:06:55,608 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 22:06:55,621 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 22:06:55,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 22:06:55,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 22:06:55,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 22:06:55,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 22:06:55,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 22:06:55,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 22:06:55,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 22:06:55,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 22:06:55,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 22:06:55,625 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 22:06:55,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 22:06:55,625 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 22:06:55,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 22:06:55,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 22:06:55,626 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 22:06:55,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 22:06:55,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 22:06:55,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 22:06:55,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 22:06:55,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 22:06:55,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 22:06:55,627 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-09-04 22:06:56,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 22:06:56,142 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 22:06:56,147 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 22:06:56,149 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 22:06:56,150 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 22:06:56,151 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-09-04 22:06:56,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d045749f/9e11fca35bd94ee580dfb4367c3c445d/FLAGcb9164593 [2020-09-04 22:06:56,786 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 22:06:56,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-09-04 22:06:56,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d045749f/9e11fca35bd94ee580dfb4367c3c445d/FLAGcb9164593 [2020-09-04 22:06:57,120 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d045749f/9e11fca35bd94ee580dfb4367c3c445d [2020-09-04 22:06:57,133 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 22:06:57,135 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 22:06:57,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 22:06:57,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 22:06:57,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 22:06:57,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:06:57" (1/1) ... [2020-09-04 22:06:57,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c2dfc77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:57, skipping insertion in model container [2020-09-04 22:06:57,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:06:57" (1/1) ... [2020-09-04 22:06:57,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 22:06:57,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 22:06:57,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:06:57,400 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 22:06:57,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:06:57,436 INFO L208 MainTranslator]: Completed translation [2020-09-04 22:06:57,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:57 WrapperNode [2020-09-04 22:06:57,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 22:06:57,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 22:06:57,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 22:06:57,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 22:06:57,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:57" (1/1) ... [2020-09-04 22:06:57,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:57" (1/1) ... [2020-09-04 22:06:57,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:57" (1/1) ... [2020-09-04 22:06:57,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:57" (1/1) ... [2020-09-04 22:06:57,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:57" (1/1) ... [2020-09-04 22:06:57,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:57" (1/1) ... [2020-09-04 22:06:57,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:57" (1/1) ... [2020-09-04 22:06:57,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 22:06:57,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 22:06:57,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 22:06:57,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 22:06:57,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 22:06:57,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 22:06:57,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 22:06:57,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-09-04 22:06:57,654 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2020-09-04 22:06:57,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 22:06:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 22:06:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-09-04 22:06:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2020-09-04 22:06:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 22:06:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 22:06:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 22:06:57,867 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 22:06:57,870 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 22:06:57,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:06:57 BoogieIcfgContainer [2020-09-04 22:06:57,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 22:06:57,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 22:06:57,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 22:06:57,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 22:06:57,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 10:06:57" (1/3) ... [2020-09-04 22:06:57,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbec809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:06:57, skipping insertion in model container [2020-09-04 22:06:57,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:57" (2/3) ... [2020-09-04 22:06:57,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbec809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:06:57, skipping insertion in model container [2020-09-04 22:06:57,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:06:57" (3/3) ... [2020-09-04 22:06:57,915 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2020-09-04 22:06:57,952 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 22:06:57,976 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 22:06:58,013 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 22:06:58,044 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 22:06:58,044 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 22:06:58,045 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 22:06:58,045 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 22:06:58,045 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 22:06:58,045 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 22:06:58,046 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 22:06:58,046 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 22:06:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-04 22:06:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 22:06:58,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:58,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:58,081 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:58,090 INFO L82 PathProgramCache]: Analyzing trace with hash -459927168, now seen corresponding path program 1 times [2020-09-04 22:06:58,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:58,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369682734] [2020-09-04 22:06:58,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:58,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:58,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369682734] [2020-09-04 22:06:58,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:06:58,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 22:06:58,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793298078] [2020-09-04 22:06:58,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:06:58,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:58,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:06:58,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:06:58,407 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 7 states. [2020-09-04 22:06:58,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:58,581 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2020-09-04 22:06:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 22:06:58,584 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-09-04 22:06:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:58,599 INFO L225 Difference]: With dead ends: 53 [2020-09-04 22:06:58,600 INFO L226 Difference]: Without dead ends: 29 [2020-09-04 22:06:58,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 22:06:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-04 22:06:58,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-09-04 22:06:58,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-04 22:06:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-09-04 22:06:58,663 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 14 [2020-09-04 22:06:58,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:58,664 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-09-04 22:06:58,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:06:58,664 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-09-04 22:06:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-04 22:06:58,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:58,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:58,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 22:06:58,667 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:58,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:58,667 INFO L82 PathProgramCache]: Analyzing trace with hash 299235803, now seen corresponding path program 1 times [2020-09-04 22:06:58,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:58,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116068863] [2020-09-04 22:06:58,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:58,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:58,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 22:06:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:58,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116068863] [2020-09-04 22:06:58,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:58,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 22:06:58,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823650443] [2020-09-04 22:06:58,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 22:06:58,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:58,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 22:06:58,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-04 22:06:58,814 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2020-09-04 22:06:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:59,000 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-04 22:06:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 22:06:59,000 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-09-04 22:06:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:59,002 INFO L225 Difference]: With dead ends: 41 [2020-09-04 22:06:59,002 INFO L226 Difference]: Without dead ends: 38 [2020-09-04 22:06:59,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-04 22:06:59,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-04 22:06:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-09-04 22:06:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 22:06:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-09-04 22:06:59,016 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 23 [2020-09-04 22:06:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:59,017 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-09-04 22:06:59,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 22:06:59,017 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-09-04 22:06:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-04 22:06:59,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:59,018 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:59,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 22:06:59,019 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:59,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:59,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1072281632, now seen corresponding path program 2 times [2020-09-04 22:06:59,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:59,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063670696] [2020-09-04 22:06:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:06:59,040 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:06:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:06:59,058 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:06:59,086 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 22:06:59,086 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 22:06:59,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 22:06:59,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 10:06:59 BoogieIcfgContainer [2020-09-04 22:06:59,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 22:06:59,117 INFO L168 Benchmark]: Toolchain (without parser) took 1980.74 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 104.8 MB in the beginning and 108.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:59,118 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 147.8 MB. Free memory was 123.4 MB in the beginning and 123.0 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-04 22:06:59,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.70 ms. Allocated memory is still 147.8 MB. Free memory was 104.4 MB in the beginning and 95.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:59,121 INFO L168 Benchmark]: Boogie Preprocessor took 132.21 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 95.2 MB in the beginning and 183.4 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:59,124 INFO L168 Benchmark]: RCFGBuilder took 311.24 ms. Allocated memory is still 204.5 MB. Free memory was 183.4 MB in the beginning and 172.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:59,125 INFO L168 Benchmark]: TraceAbstraction took 1226.78 ms. Allocated memory is still 204.5 MB. Free memory was 172.3 MB in the beginning and 108.0 MB in the end (delta: 64.2 MB). Peak memory consumption was 64.2 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:59,129 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 147.8 MB. Free memory was 123.4 MB in the beginning and 123.0 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.70 ms. Allocated memory is still 147.8 MB. Free memory was 104.4 MB in the beginning and 95.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.21 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 95.2 MB in the beginning and 183.4 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 311.24 ms. Allocated memory is still 204.5 MB. Free memory was 183.4 MB in the beginning and 172.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1226.78 ms. Allocated memory is still 204.5 MB. Free memory was 172.3 MB in the beginning and 108.0 MB in the end (delta: 64.2 MB). Peak memory consumption was 64.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i=0; VAL [i=0] [L24] COND TRUE i<5 VAL [i=0] [L25] i++ VAL [i=1] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=1] [L24] COND TRUE i<5 VAL [i=1] [L25] i++ VAL [i=2] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=2] [L24] COND TRUE i<5 VAL [i=2] [L25] i++ VAL [i=3] [L29] CALL check_error(i!=3) VAL [\old(b)=0] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=0, b=0] [L18] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 25 SDslu, 110 SDs, 0 SdLazy, 80 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=2, 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, 2 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 1433 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/7 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 incorrect! Received shutdown request...