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-invgen/MADWiFi-encode_ie_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:25:27,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:25:27,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:25:27,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:25:27,309 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 [2019-09-20 13:25:27,341 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:25:27,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:25:27,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:25:27,342 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:25:27,343 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:25:27,343 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:25:27,343 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:25:27,343 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:25:27,343 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:25:27,344 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:25:27,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:25:27,344 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:25:27,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:25:27,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:25:27,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:25:27,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:25:27,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:25:27,346 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:25:27,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:25:27,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:25:27,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:25:27,346 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:25:27,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:25:27,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:27,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:25:27,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:25:27,347 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:25:27,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:25:27,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:25:27,348 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:25:27,376 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:25:27,389 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:25:27,393 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:25:27,394 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:25:27,395 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:25:27,395 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2019-09-20 13:25:27,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d14669ee/1bc10c8ca4984befba849fe08f9b8bcc/FLAGeb0c4a2d8 [2019-09-20 13:25:27,844 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:25:27,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2019-09-20 13:25:27,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d14669ee/1bc10c8ca4984befba849fe08f9b8bcc/FLAGeb0c4a2d8 [2019-09-20 13:25:28,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d14669ee/1bc10c8ca4984befba849fe08f9b8bcc [2019-09-20 13:25:28,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:25:28,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:25:28,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:28,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:25:28,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:25:28,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:28" (1/1) ... [2019-09-20 13:25:28,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73eb1a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:28, skipping insertion in model container [2019-09-20 13:25:28,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:28" (1/1) ... [2019-09-20 13:25:28,304 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:25:28,327 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:25:28,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:28,570 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:25:28,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:28,614 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:25:28,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:28 WrapperNode [2019-09-20 13:25:28,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:28,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:25:28,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:25:28,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:25:28,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:28" (1/1) ... [2019-09-20 13:25:28,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:28" (1/1) ... [2019-09-20 13:25:28,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:28" (1/1) ... [2019-09-20 13:25:28,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:28" (1/1) ... [2019-09-20 13:25:28,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:28" (1/1) ... [2019-09-20 13:25:28,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:28" (1/1) ... [2019-09-20 13:25:28,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:28" (1/1) ... [2019-09-20 13:25:28,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:25:28,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:25:28,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:25:28,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:25:28,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:28" (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 [2019-09-20 13:25:28,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:25:28,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:25:28,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:25:28,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:25:28,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:25:28,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 13:25:28,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:25:28,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:25:28,821 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:25:28,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:25:28,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:25:29,080 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:25:29,080 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 13:25:29,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:29 BoogieIcfgContainer [2019-09-20 13:25:29,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:25:29,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:25:29,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:25:29,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:25:29,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:25:28" (1/3) ... [2019-09-20 13:25:29,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ac73ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:29, skipping insertion in model container [2019-09-20 13:25:29,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:28" (2/3) ... [2019-09-20 13:25:29,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ac73ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:29, skipping insertion in model container [2019-09-20 13:25:29,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:29" (3/3) ... [2019-09-20 13:25:29,090 INFO L109 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.i [2019-09-20 13:25:29,101 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:25:29,109 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:25:29,129 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:25:29,185 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:25:29,185 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:25:29,185 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:25:29,185 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:25:29,186 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:25:29,186 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:25:29,186 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:25:29,190 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:25:29,230 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-09-20 13:25:29,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-20 13:25:29,255 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:29,256 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:29,260 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:29,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:29,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1770779542, now seen corresponding path program 1 times [2019-09-20 13:25:29,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:29,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:29,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:29,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:29,345 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:29,597 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:29,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:25:29,597 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:29,603 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:25:29,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:25:29,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:25:29,625 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 6 states. [2019-09-20 13:25:29,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:29,767 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-09-20 13:25:29,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:25:29,770 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-09-20 13:25:29,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:29,783 INFO L225 Difference]: With dead ends: 36 [2019-09-20 13:25:29,784 INFO L226 Difference]: Without dead ends: 28 [2019-09-20 13:25:29,788 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:25:29,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-20 13:25:29,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-20 13:25:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-20 13:25:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-09-20 13:25:29,840 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 18 [2019-09-20 13:25:29,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:29,841 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-09-20 13:25:29,841 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:25:29,842 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-09-20 13:25:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-20 13:25:29,843 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:29,844 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:29,844 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:29,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:29,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1769173835, now seen corresponding path program 1 times [2019-09-20 13:25:29,847 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:29,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:29,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:29,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:29,853 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:29,993 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:29,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:25:29,994 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:29,996 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:25:29,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:25:29,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:25:29,997 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 6 states. [2019-09-20 13:25:30,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:30,101 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-09-20 13:25:30,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:25:30,102 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-09-20 13:25:30,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:30,104 INFO L225 Difference]: With dead ends: 36 [2019-09-20 13:25:30,105 INFO L226 Difference]: Without dead ends: 36 [2019-09-20 13:25:30,107 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:25:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-20 13:25:30,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-09-20 13:25:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-20 13:25:30,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-09-20 13:25:30,127 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 23 [2019-09-20 13:25:30,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:30,128 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-09-20 13:25:30,129 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:25:30,129 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-09-20 13:25:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-20 13:25:30,132 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:30,132 INFO L407 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:30,132 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:30,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:30,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1089945877, now seen corresponding path program 1 times [2019-09-20 13:25:30,133 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:30,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:30,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:30,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:30,137 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-20 13:25:30,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:30,262 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:25:30,263 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2019-09-20 13:25:30,265 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [25], [31], [39], [44], [52], [55], [57], [62], [65], [67], [70], [72], [73], [74], [75], [77], [78], [79], [80] [2019-09-20 13:25:30,306 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:25:30,307 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:25:30,580 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-20 13:25:30,583 INFO L272 AbstractInterpreter]: Visited 25 different actions 132 times. Merged at 5 different actions 30 times. Widened at 1 different actions 2 times. Performed 169 root evaluator evaluations with a maximum evaluation depth of 6. Performed 169 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 10 variables. [2019-09-20 13:25:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:30,589 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-20 13:25:30,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:30,590 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) [2019-09-20 13:25:30,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:30,612 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:25:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:30,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-20 13:25:30,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:25:30,785 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:25:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-20 13:25:30,819 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:25:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-20 13:25:30,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:25:30,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2019-09-20 13:25:30,961 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:25:30,962 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-20 13:25:30,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-20 13:25:30,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-09-20 13:25:30,963 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2019-09-20 13:25:31,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:31,180 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-09-20 13:25:31,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-20 13:25:31,180 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2019-09-20 13:25:31,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:31,181 INFO L225 Difference]: With dead ends: 39 [2019-09-20 13:25:31,181 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:25:31,182 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-09-20 13:25:31,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:25:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:25:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:25:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:25:31,183 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2019-09-20 13:25:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:31,184 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:25:31,184 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-20 13:25:31,184 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:25:31,184 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:25:31,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:25:31 BoogieIcfgContainer [2019-09-20 13:25:31,189 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:25:31,194 INFO L168 Benchmark]: Toolchain (without parser) took 2906.85 ms. Allocated memory was 131.6 MB in the beginning and 219.7 MB in the end (delta: 88.1 MB). Free memory was 87.5 MB in the beginning and 139.0 MB in the end (delta: -51.6 MB). Peak memory consumption was 36.5 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:31,196 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 131.6 MB. Free memory was 105.6 MB in the beginning and 105.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:25:31,197 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.93 ms. Allocated memory is still 131.6 MB. Free memory was 87.3 MB in the beginning and 77.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:31,198 INFO L168 Benchmark]: Boogie Preprocessor took 139.69 ms. Allocated memory was 131.6 MB in the beginning and 198.2 MB in the end (delta: 66.6 MB). Free memory was 77.7 MB in the beginning and 174.5 MB in the end (delta: -96.8 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:31,198 INFO L168 Benchmark]: RCFGBuilder took 325.70 ms. Allocated memory is still 198.2 MB. Free memory was 174.5 MB in the beginning and 160.6 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:31,200 INFO L168 Benchmark]: TraceAbstraction took 2106.74 ms. Allocated memory was 198.2 MB in the beginning and 219.7 MB in the end (delta: 21.5 MB). Free memory was 160.0 MB in the beginning and 139.0 MB in the end (delta: 21.0 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:31,210 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 131.6 MB. Free memory was 105.6 MB in the beginning and 105.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 327.93 ms. Allocated memory is still 131.6 MB. Free memory was 87.3 MB in the beginning and 77.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.69 ms. Allocated memory was 131.6 MB in the beginning and 198.2 MB in the end (delta: 66.6 MB). Free memory was 77.7 MB in the beginning and 174.5 MB in the end (delta: -96.8 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.70 ms. Allocated memory is still 198.2 MB. Free memory was 174.5 MB in the beginning and 160.6 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2106.74 ms. Allocated memory was 198.2 MB in the beginning and 219.7 MB in the end (delta: 21.5 MB). Free memory was 160.0 MB in the beginning and 139.0 MB in the end (delta: 21.0 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 1 error locations. SAFE Result, 2.0s OverallTime, 3 OverallIterations, 4 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 80 SDtfs, 39 SDslu, 336 SDs, 0 SdLazy, 168 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 144 ConstructedInterpolants, 0 QuantifiedInterpolants, 13813 SizeOfPredicates, 9 NumberOfNonLiveVariables, 82 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 57/65 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...