java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 17:07:01,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 17:07:01,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 17:07:01,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-16 17:07:02,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-16 17:07:02,055 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 17:07:02,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 17:07:02,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-16 17:07:02,056 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-16 17:07:02,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-16 17:07:02,057 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-16 17:07:02,057 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-16 17:07:02,058 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-16 17:07:02,058 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-16 17:07:02,058 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-16 17:07:02,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 17:07:02,061 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 17:07:02,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 17:07:02,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 17:07:02,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 17:07:02,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 17:07:02,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 17:07:02,062 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 17:07:02,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 17:07:02,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 17:07:02,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 17:07:02,063 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-16 17:07:02,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 17:07:02,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:07:02,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 17:07:02,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 17:07:02,064 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-16 17:07:02,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 17:07:02,065 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 17:07:02,065 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-16 17:07:02,118 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 17:07:02,135 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 17:07:02,139 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 17:07:02,141 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 17:07:02,141 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 17:07:02,142 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2019-09-16 17:07:02,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a457d98a8/7822c83dd16d4e8d91fb75dd621aa1fb/FLAG7a11e9b21 [2019-09-16 17:07:02,613 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 17:07:02,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2019-09-16 17:07:02,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a457d98a8/7822c83dd16d4e8d91fb75dd621aa1fb/FLAG7a11e9b21 [2019-09-16 17:07:03,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a457d98a8/7822c83dd16d4e8d91fb75dd621aa1fb [2019-09-16 17:07:03,024 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 17:07:03,025 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 17:07:03,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 17:07:03,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 17:07:03,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 17:07:03,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:07:03" (1/1) ... [2019-09-16 17:07:03,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@195e20e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:07:03, skipping insertion in model container [2019-09-16 17:07:03,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:07:03" (1/1) ... [2019-09-16 17:07:03,041 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 17:07:03,055 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 17:07:03,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:07:03,219 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 17:07:03,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:07:03,242 INFO L192 MainTranslator]: Completed translation [2019-09-16 17:07:03,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:07:03 WrapperNode [2019-09-16 17:07:03,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 17:07:03,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 17:07:03,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 17:07:03,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 17:07:03,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:07:03" (1/1) ... [2019-09-16 17:07:03,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:07:03" (1/1) ... [2019-09-16 17:07:03,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:07:03" (1/1) ... [2019-09-16 17:07:03,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:07:03" (1/1) ... [2019-09-16 17:07:03,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:07:03" (1/1) ... [2019-09-16 17:07:03,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:07:03" (1/1) ... [2019-09-16 17:07:03,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:07:03" (1/1) ... [2019-09-16 17:07:03,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 17:07:03,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 17:07:03,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 17:07:03,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 17:07:03,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:07:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:07:03,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 17:07:03,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 17:07:03,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2019-09-16 17:07:03,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 17:07:03,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 17:07:03,410 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2019-09-16 17:07:03,411 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 17:07:03,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 17:07:03,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 17:07:03,551 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 17:07:03,551 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-16 17:07:03,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:07:03 BoogieIcfgContainer [2019-09-16 17:07:03,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 17:07:03,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 17:07:03,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 17:07:03,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 17:07:03,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 05:07:03" (1/3) ... [2019-09-16 17:07:03,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2643b064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:07:03, skipping insertion in model container [2019-09-16 17:07:03,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:07:03" (2/3) ... [2019-09-16 17:07:03,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2643b064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:07:03, skipping insertion in model container [2019-09-16 17:07:03,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:07:03" (3/3) ... [2019-09-16 17:07:03,561 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.c_1.i [2019-09-16 17:07:03,569 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 17:07:03,575 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 17:07:03,590 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 17:07:03,616 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 17:07:03,616 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-16 17:07:03,616 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 17:07:03,616 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 17:07:03,616 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 17:07:03,617 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 17:07:03,617 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 17:07:03,617 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 17:07:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-09-16 17:07:03,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-09-16 17:07:03,641 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:07:03,642 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:07:03,644 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:07:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:07:03,649 INFO L82 PathProgramCache]: Analyzing trace with hash 676687463, now seen corresponding path program 1 times [2019-09-16 17:07:03,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:07:03,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:07:03,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:07:03,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:07:03,696 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:07:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:07:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:07:03,784 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:07:03,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-16 17:07:03,785 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:07:03,789 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-16 17:07:03,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-16 17:07:03,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-16 17:07:03,808 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2019-09-16 17:07:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:07:03,990 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-16 17:07:03,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 17:07:03,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-09-16 17:07:03,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:07:04,003 INFO L225 Difference]: With dead ends: 18 [2019-09-16 17:07:04,004 INFO L226 Difference]: Without dead ends: 13 [2019-09-16 17:07:04,008 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-16 17:07:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-16 17:07:04,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-09-16 17:07:04,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-16 17:07:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-09-16 17:07:04,045 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2019-09-16 17:07:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:07:04,046 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-09-16 17:07:04,046 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-16 17:07:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-09-16 17:07:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-16 17:07:04,047 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:07:04,048 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:07:04,049 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:07:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:07:04,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1754257002, now seen corresponding path program 1 times [2019-09-16 17:07:04,051 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:07:04,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:07:04,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:07:04,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:07:04,055 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:07:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:07:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:07:04,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:07:04,159 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:07:04,160 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 12 with the following transitions: [2019-09-16 17:07:04,162 INFO L207 CegarAbsIntRunner]: [0], [1], [7], [16], [19], [21], [29], [30], [31], [33] [2019-09-16 17:07:04,188 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-16 17:07:04,188 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-16 17:07:04,278 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-16 17:07:04,281 INFO L272 AbstractInterpreter]: Visited 10 different actions 16 times. Merged at 2 different actions 4 times. Never widened. Performed 27 root evaluator evaluations with a maximum evaluation depth of 4. Performed 27 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2019-09-16 17:07:04,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:07:04,284 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-16 17:07:04,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:07:04,285 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:07:04,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:07:04,312 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-16 17:07:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:07:04,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-16 17:07:04,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:07:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:07:04,351 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:07:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:07:04,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:07:04,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2019-09-16 17:07:04,398 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:07:04,399 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 17:07:04,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 17:07:04,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-16 17:07:04,400 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2019-09-16 17:07:04,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:07:04,436 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-16 17:07:04,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 17:07:04,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-09-16 17:07:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:07:04,438 INFO L225 Difference]: With dead ends: 15 [2019-09-16 17:07:04,438 INFO L226 Difference]: Without dead ends: 15 [2019-09-16 17:07:04,439 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-16 17:07:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-16 17:07:04,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-09-16 17:07:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-16 17:07:04,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-16 17:07:04,445 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-09-16 17:07:04,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:07:04,446 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-16 17:07:04,446 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 17:07:04,446 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-16 17:07:04,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-16 17:07:04,447 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:07:04,448 INFO L407 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:07:04,448 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:07:04,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:07:04,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2083501651, now seen corresponding path program 2 times [2019-09-16 17:07:04,448 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:07:04,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:07:04,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:07:04,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:07:04,454 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:07:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-16 17:07:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-16 17:07:04,493 INFO L474 BasicCegarLoop]: Counterexample might be feasible [2019-09-16 17:07:04,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 05:07:04 BoogieIcfgContainer [2019-09-16 17:07:04,509 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 17:07:04,511 INFO L168 Benchmark]: Toolchain (without parser) took 1485.63 ms. Allocated memory was 139.5 MB in the beginning and 199.2 MB in the end (delta: 59.8 MB). Free memory was 86.8 MB in the beginning and 119.9 MB in the end (delta: -33.1 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2019-09-16 17:07:04,512 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 105.4 MB in the beginning and 105.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 17:07:04,513 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.57 ms. Allocated memory is still 139.5 MB. Free memory was 86.6 MB in the beginning and 77.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-09-16 17:07:04,514 INFO L168 Benchmark]: Boogie Preprocessor took 110.37 ms. Allocated memory was 139.5 MB in the beginning and 199.2 MB in the end (delta: 59.8 MB). Free memory was 77.5 MB in the beginning and 177.2 MB in the end (delta: -99.7 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-09-16 17:07:04,515 INFO L168 Benchmark]: RCFGBuilder took 199.62 ms. Allocated memory is still 199.2 MB. Free memory was 177.2 MB in the beginning and 166.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2019-09-16 17:07:04,516 INFO L168 Benchmark]: TraceAbstraction took 954.18 ms. Allocated memory is still 199.2 MB. Free memory was 166.0 MB in the beginning and 119.9 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. [2019-09-16 17:07:04,519 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 105.4 MB in the beginning and 105.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 217.57 ms. Allocated memory is still 139.5 MB. Free memory was 86.6 MB in the beginning and 77.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.37 ms. Allocated memory was 139.5 MB in the beginning and 199.2 MB in the end (delta: 59.8 MB). Free memory was 77.5 MB in the beginning and 177.2 MB in the end (delta: -99.7 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 199.62 ms. Allocated memory is still 199.2 MB. Free memory was 177.2 MB in the beginning and 166.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 954.18 ms. Allocated memory is still 199.2 MB. Free memory was 166.0 MB in the beginning and 119.9 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.1 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: [L12] int i=0; VAL [i=0] [L13] COND TRUE i<5 [L14] i++ VAL [i=1] [L16] (i!=3) ? (0) : __blast_assert () VAL [i=1] [L13] COND TRUE i<5 [L14] i++ VAL [i=2] [L16] (i!=3) ? (0) : __blast_assert () VAL [i=2] [L13] COND TRUE i<5 [L14] i++ VAL [i=3] [L16] (i!=3) ? (0) : __blast_assert () VAL [i=3] [L16] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. UNSAFE Result, 0.9s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 3 SDslu, 38 SDs, 0 SdLazy, 21 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 636 SizeOfPredicates, 1 NumberOfNonLiveVariables, 25 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...