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/loop-lit/jm2006.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 17:03:37,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 17:03:37,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 17:03:37,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-16 17:03:37,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 17:03:37,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 17:03:37,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 17:03:37,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 17:03:37,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 17:03:37,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 17:03:37,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 17:03:37,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 17:03:37,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 17:03:37,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 17:03:37,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 17:03:37,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 17:03:37,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 17:03:37,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 17:03:37,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 17:03:37,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 17:03:37,502 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 17:03:37,519 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 17:03:37,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 17:03:37,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-16 17:03:37,522 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-16 17:03:37,523 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-16 17:03:37,523 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-16 17:03:37,523 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-16 17:03:37,523 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-16 17:03:37,523 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-16 17:03:37,524 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-16 17:03:37,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 17:03:37,527 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 17:03:37,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 17:03:37,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 17:03:37,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 17:03:37,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 17:03:37,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 17:03:37,529 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 17:03:37,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 17:03:37,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 17:03:37,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 17:03:37,530 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-16 17:03:37,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 17:03:37,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:03:37,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 17:03:37,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 17:03:37,531 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-16 17:03:37,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 17:03:37,532 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 17:03:37,532 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-16 17:03:37,588 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 17:03:37,606 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 17:03:37,610 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 17:03:37,612 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 17:03:37,612 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 17:03:37,614 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2019-09-16 17:03:37,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5943c7988/b67ea70e836f40268440f822a2d0311e/FLAGc3a065a96 [2019-09-16 17:03:38,131 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 17:03:38,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2019-09-16 17:03:38,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5943c7988/b67ea70e836f40268440f822a2d0311e/FLAGc3a065a96 [2019-09-16 17:03:38,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5943c7988/b67ea70e836f40268440f822a2d0311e [2019-09-16 17:03:38,506 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 17:03:38,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 17:03:38,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 17:03:38,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 17:03:38,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 17:03:38,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:03:38" (1/1) ... [2019-09-16 17:03:38,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e48aa35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:38, skipping insertion in model container [2019-09-16 17:03:38,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:03:38" (1/1) ... [2019-09-16 17:03:38,523 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 17:03:38,541 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 17:03:38,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:03:38,721 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 17:03:38,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:03:38,761 INFO L192 MainTranslator]: Completed translation [2019-09-16 17:03:38,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:38 WrapperNode [2019-09-16 17:03:38,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 17:03:38,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 17:03:38,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 17:03:38,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 17:03:38,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:38" (1/1) ... [2019-09-16 17:03:38,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:38" (1/1) ... [2019-09-16 17:03:38,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:38" (1/1) ... [2019-09-16 17:03:38,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:38" (1/1) ... [2019-09-16 17:03:38,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:38" (1/1) ... [2019-09-16 17:03:38,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:38" (1/1) ... [2019-09-16 17:03:38,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:38" (1/1) ... [2019-09-16 17:03:38,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 17:03:38,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 17:03:38,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 17:03:38,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 17:03:38,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:38" (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 17:03:38,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 17:03:38,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 17:03:38,950 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 17:03:38,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 17:03:38,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-16 17:03:38,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 17:03:38,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-16 17:03:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 17:03:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 17:03:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 17:03:39,112 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 17:03:39,113 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-16 17:03:39,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:03:39 BoogieIcfgContainer [2019-09-16 17:03:39,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 17:03:39,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 17:03:39,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 17:03:39,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 17:03:39,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 05:03:38" (1/3) ... [2019-09-16 17:03:39,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346576f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:03:39, skipping insertion in model container [2019-09-16 17:03:39,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:38" (2/3) ... [2019-09-16 17:03:39,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346576f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:03:39, skipping insertion in model container [2019-09-16 17:03:39,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:03:39" (3/3) ... [2019-09-16 17:03:39,123 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.c.i.v+cfa-reducer.c [2019-09-16 17:03:39,133 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 17:03:39,142 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 17:03:39,173 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 17:03:39,210 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 17:03:39,211 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-16 17:03:39,211 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 17:03:39,211 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 17:03:39,211 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 17:03:39,211 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 17:03:39,211 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 17:03:39,212 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 17:03:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-09-16 17:03:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-16 17:03:39,245 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:39,246 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:39,249 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:39,257 INFO L82 PathProgramCache]: Analyzing trace with hash -696314067, now seen corresponding path program 1 times [2019-09-16 17:03:39,260 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:39,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:39,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:39,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:39,320 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:39,546 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 17:03:39,549 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:39,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-16 17:03:39,549 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:39,553 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-16 17:03:39,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-16 17:03:39,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-16 17:03:39,567 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 6 states. [2019-09-16 17:03:39,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:39,759 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-09-16 17:03:39,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 17:03:39,761 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-09-16 17:03:39,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:39,771 INFO L225 Difference]: With dead ends: 26 [2019-09-16 17:03:39,771 INFO L226 Difference]: Without dead ends: 14 [2019-09-16 17:03:39,774 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-16 17:03:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-16 17:03:39,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-16 17:03:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-16 17:03:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-16 17:03:39,805 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-16 17:03:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:39,806 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-16 17:03:39,806 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-16 17:03:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-16 17:03:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-16 17:03:39,807 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:39,807 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:39,808 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:39,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:39,808 INFO L82 PathProgramCache]: Analyzing trace with hash -112838900, now seen corresponding path program 1 times [2019-09-16 17:03:39,809 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:39,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:39,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:39,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:39,811 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:39,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:39,989 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:39,992 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2019-09-16 17:03:39,994 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [17], [19], [22], [25], [26], [31], [32], [33] [2019-09-16 17:03:40,032 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-16 17:03:40,032 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-16 17:03:40,217 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-16 17:03:40,220 INFO L272 AbstractInterpreter]: Visited 13 different actions 33 times. Merged at 5 different actions 20 times. Widened at 1 different actions 2 times. Performed 134 root evaluator evaluations with a maximum evaluation depth of 4. Performed 134 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 14 variables. [2019-09-16 17:03:40,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:40,224 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-16 17:03:40,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:40,224 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 17:03:40,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:40,240 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-16 17:03:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:40,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-16 17:03:40,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:40,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 17:03:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:40,390 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:40,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:40,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2019-09-16 17:03:40,475 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:40,477 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-16 17:03:40,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-16 17:03:40,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-09-16 17:03:40,478 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 9 states. [2019-09-16 17:03:40,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:40,688 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-16 17:03:40,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-16 17:03:40,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-09-16 17:03:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:40,690 INFO L225 Difference]: With dead ends: 20 [2019-09-16 17:03:40,690 INFO L226 Difference]: Without dead ends: 16 [2019-09-16 17:03:40,691 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-09-16 17:03:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-16 17:03:40,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-16 17:03:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-16 17:03:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-16 17:03:40,695 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2019-09-16 17:03:40,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:40,695 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-16 17:03:40,695 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-16 17:03:40,695 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-16 17:03:40,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-16 17:03:40,696 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:40,696 INFO L407 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:40,697 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:40,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1126058196, now seen corresponding path program 2 times [2019-09-16 17:03:40,697 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:40,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:40,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:40,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:40,700 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-16 17:03:40,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:40,862 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:40,862 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-16 17:03:40,862 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-16 17:03:40,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:40,863 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-16 17:03:40,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 17:03:40,883 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:03:40,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-16 17:03:40,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 17:03:40,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-16 17:03:40,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:40,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 17:03:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:41,007 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:41,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:41,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2019-09-16 17:03:41,147 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:41,149 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-16 17:03:41,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-16 17:03:41,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-09-16 17:03:41,150 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 12 states. [2019-09-16 17:03:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:41,356 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-09-16 17:03:41,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-16 17:03:41,356 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-09-16 17:03:41,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:41,357 INFO L225 Difference]: With dead ends: 17 [2019-09-16 17:03:41,357 INFO L226 Difference]: Without dead ends: 0 [2019-09-16 17:03:41,358 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2019-09-16 17:03:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-16 17:03:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-16 17:03:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-16 17:03:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-16 17:03:41,359 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2019-09-16 17:03:41,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:41,360 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-16 17:03:41,360 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-16 17:03:41,360 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-16 17:03:41,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-16 17:03:41,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 05:03:41 BoogieIcfgContainer [2019-09-16 17:03:41,366 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 17:03:41,371 INFO L168 Benchmark]: Toolchain (without parser) took 2861.42 ms. Allocated memory was 141.6 MB in the beginning and 227.0 MB in the end (delta: 85.5 MB). Free memory was 89.6 MB in the beginning and 108.0 MB in the end (delta: -18.4 MB). Peak memory consumption was 67.0 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:41,372 INFO L168 Benchmark]: CDTParser took 1.14 ms. Allocated memory is still 141.6 MB. Free memory was 107.6 MB in the beginning and 107.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 17:03:41,374 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.98 ms. Allocated memory is still 141.6 MB. Free memory was 89.4 MB in the beginning and 79.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:41,376 INFO L168 Benchmark]: Boogie Preprocessor took 125.60 ms. Allocated memory was 141.6 MB in the beginning and 198.7 MB in the end (delta: 57.1 MB). Free memory was 79.9 MB in the beginning and 176.3 MB in the end (delta: -96.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:41,377 INFO L168 Benchmark]: RCFGBuilder took 226.79 ms. Allocated memory is still 198.7 MB. Free memory was 176.3 MB in the beginning and 164.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:41,379 INFO L168 Benchmark]: TraceAbstraction took 2251.33 ms. Allocated memory was 198.7 MB in the beginning and 227.0 MB in the end (delta: 28.3 MB). Free memory was 164.2 MB in the beginning and 108.0 MB in the end (delta: 56.1 MB). Peak memory consumption was 84.5 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:41,388 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.14 ms. Allocated memory is still 141.6 MB. Free memory was 107.6 MB in the beginning and 107.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.98 ms. Allocated memory is still 141.6 MB. Free memory was 89.4 MB in the beginning and 79.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.60 ms. Allocated memory was 141.6 MB in the beginning and 198.7 MB in the end (delta: 57.1 MB). Free memory was 79.9 MB in the beginning and 176.3 MB in the end (delta: -96.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 226.79 ms. Allocated memory is still 198.7 MB. Free memory was 176.3 MB in the beginning and 164.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2251.33 ms. Allocated memory was 198.7 MB in the beginning and 227.0 MB in the end (delta: 28.3 MB). Free memory was 164.2 MB in the beginning and 108.0 MB in the end (delta: 56.1 MB). Peak memory consumption was 84.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 17 locations, 1 error locations. SAFE Result, 2.1s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 37 SDtfs, 43 SDslu, 117 SDs, 0 SdLazy, 113 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.0s 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, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 89 ConstructedInterpolants, 0 QuantifiedInterpolants, 6024 SizeOfPredicates, 16 NumberOfNonLiveVariables, 130 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 1/21 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...