/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:33:01,455 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 23:33:01,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:33:01,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:33:01,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:33:01,516 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 23:33:01,556 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:33:01,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:33:01,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:33:01,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:33:01,562 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:33:01,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:33:01,566 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:33:01,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:33:01,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:33:01,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:33:01,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:33:01,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:33:01,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:33:01,567 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:33:01,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:33:01,568 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:33:01,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:33:01,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:33:01,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:33:01,569 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:33:01,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:33:01,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:33:01,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:33:01,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:33:01,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:33:01,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:33:01,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:33:01,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:33:01,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:33:01,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:33:01,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:33:01,930 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:33:01,933 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:33:01,935 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:33:01,935 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:33:01,936 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-08-18 23:33:01,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e87d2fe9d/721b9910c3eb420db964d6a15f681e42/FLAG605d1b8ca [2020-08-18 23:33:02,434 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:33:02,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-08-18 23:33:02,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e87d2fe9d/721b9910c3eb420db964d6a15f681e42/FLAG605d1b8ca [2020-08-18 23:33:02,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e87d2fe9d/721b9910c3eb420db964d6a15f681e42 [2020-08-18 23:33:02,803 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:33:02,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:33:02,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:33:02,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:33:02,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:33:02,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:33:02" (1/1) ... [2020-08-18 23:33:02,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c23f4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:02, skipping insertion in model container [2020-08-18 23:33:02,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:33:02" (1/1) ... [2020-08-18 23:33:02,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:33:02,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:33:03,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:33:03,061 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:33:03,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:33:03,088 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:33:03,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:03 WrapperNode [2020-08-18 23:33:03,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:33:03,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:33:03,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:33:03,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:33:03,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:03" (1/1) ... [2020-08-18 23:33:03,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:03" (1/1) ... [2020-08-18 23:33:03,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:03" (1/1) ... [2020-08-18 23:33:03,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:03" (1/1) ... [2020-08-18 23:33:03,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:03" (1/1) ... [2020-08-18 23:33:03,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:03" (1/1) ... [2020-08-18 23:33:03,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:03" (1/1) ... [2020-08-18 23:33:03,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:33:03,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:33:03,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:33:03,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:33:03,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:33:03,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:33:03,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:33:03,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-18 23:33:03,262 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2020-08-18 23:33:03,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:33:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:33:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-18 23:33:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2020-08-18 23:33:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:33:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:33:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:33:03,429 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:33:03,429 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 23:33:03,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:33:03 BoogieIcfgContainer [2020-08-18 23:33:03,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:33:03,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:33:03,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:33:03,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:33:03,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:33:02" (1/3) ... [2020-08-18 23:33:03,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556d30f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:33:03, skipping insertion in model container [2020-08-18 23:33:03,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:33:03" (2/3) ... [2020-08-18 23:33:03,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556d30f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:33:03, skipping insertion in model container [2020-08-18 23:33:03,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:33:03" (3/3) ... [2020-08-18 23:33:03,441 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2020-08-18 23:33:03,452 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:33:03,459 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:33:03,472 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:33:03,496 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:33:03,496 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:33:03,497 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:33:03,497 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:33:03,497 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:33:03,497 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:33:03,497 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:33:03,497 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:33:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-18 23:33:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 23:33:03,522 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:03,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:03,523 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:03,529 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2020-08-18 23:33:03,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:03,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633291232] [2020-08-18 23:33:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:03,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:33:03,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633291232] [2020-08-18 23:33:03,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:33:03,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 23:33:03,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279304500] [2020-08-18 23:33:03,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 23:33:03,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:03,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 23:33:03,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:33:03,789 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-08-18 23:33:03,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:03,902 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-08-18 23:33:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 23:33:03,904 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-08-18 23:33:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:03,914 INFO L225 Difference]: With dead ends: 42 [2020-08-18 23:33:03,915 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 23:33:03,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 23:33:03,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 23:33:03,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-18 23:33:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 23:33:03,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-08-18 23:33:03,965 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2020-08-18 23:33:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:03,966 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-08-18 23:33:03,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 23:33:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-08-18 23:33:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 23:33:03,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:03,968 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:03,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:33:03,969 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:03,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2020-08-18 23:33:03,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:03,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681309804] [2020-08-18 23:33:03,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:04,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:33:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:04,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:33:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:33:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:33:04,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681309804] [2020-08-18 23:33:04,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:33:04,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 23:33:04,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419531282] [2020-08-18 23:33:04,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 23:33:04,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:33:04,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 23:33:04,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 23:33:04,094 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-08-18 23:33:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:33:04,190 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-08-18 23:33:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 23:33:04,191 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-08-18 23:33:04,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:33:04,192 INFO L225 Difference]: With dead ends: 30 [2020-08-18 23:33:04,192 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 23:33:04,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-18 23:33:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 23:33:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-08-18 23:33:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 23:33:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-08-18 23:33:04,201 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2020-08-18 23:33:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:33:04,202 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-08-18 23:33:04,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 23:33:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-08-18 23:33:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 23:33:04,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:33:04,204 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:33:04,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:33:04,204 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:33:04,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:33:04,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2020-08-18 23:33:04,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:33:04,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167715592] [2020-08-18 23:33:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:33:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 23:33:04,225 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 23:33:04,226 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 23:33:04,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:33:04,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:33:04 BoogieIcfgContainer [2020-08-18 23:33:04,244 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:33:04,246 INFO L168 Benchmark]: Toolchain (without parser) took 1441.42 ms. Allocated memory was 147.3 MB in the beginning and 202.4 MB in the end (delta: 55.1 MB). Free memory was 103.4 MB in the beginning and 125.8 MB in the end (delta: -22.4 MB). Peak memory consumption was 32.7 MB. Max. memory is 7.1 GB. [2020-08-18 23:33:04,247 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 23:33:04,248 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.07 ms. Allocated memory is still 147.3 MB. Free memory was 103.0 MB in the beginning and 93.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-18 23:33:04,249 INFO L168 Benchmark]: Boogie Preprocessor took 113.38 ms. Allocated memory was 147.3 MB in the beginning and 202.4 MB in the end (delta: 55.1 MB). Free memory was 93.8 MB in the beginning and 182.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-18 23:33:04,250 INFO L168 Benchmark]: RCFGBuilder took 229.81 ms. Allocated memory is still 202.4 MB. Free memory was 182.3 MB in the beginning and 170.0 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-18 23:33:04,251 INFO L168 Benchmark]: TraceAbstraction took 809.72 ms. Allocated memory is still 202.4 MB. Free memory was 169.3 MB in the beginning and 125.8 MB in the end (delta: 43.6 MB). Peak memory consumption was 43.6 MB. Max. memory is 7.1 GB. [2020-08-18 23:33:04,257 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.07 ms. Allocated memory is still 147.3 MB. Free memory was 103.0 MB in the beginning and 93.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.38 ms. Allocated memory was 147.3 MB in the beginning and 202.4 MB in the end (delta: 55.1 MB). Free memory was 93.8 MB in the beginning and 182.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 229.81 ms. Allocated memory is still 202.4 MB. Free memory was 182.3 MB in the beginning and 170.0 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 809.72 ms. Allocated memory is still 202.4 MB. Free memory was 169.3 MB in the beginning and 125.8 MB in the end (delta: 43.6 MB). Peak memory consumption was 43.6 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; [L24] COND TRUE i<5 [L25] i++ [L29] CALL check_error(i!=3) [L18] (b) ? (0) : __blast_assert () [L29] RET check_error(i!=3) [L24] COND TRUE i<5 [L25] i++ [L29] CALL check_error(i!=3) [L18] (b) ? (0) : __blast_assert () [L29] RET check_error(i!=3) [L24] COND TRUE i<5 [L25] i++ [L29] CALL check_error(i!=3) [L18] (b) ? (0) : __blast_assert () [L18] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 12 SDslu, 108 SDs, 0 SdLazy, 48 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 680 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/4 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...