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/recursive/McCarthy91-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 02:51:34,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 02:51:34,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 02:51:34,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 02:51:34,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 02:51:34,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 02:51:34,318 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 02:51:34,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 02:51:34,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 02:51:34,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 02:51:34,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 02:51:34,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 02:51:34,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 02:51:34,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 02:51:34,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 02:51:34,323 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 [2019-09-10 02:51:34,338 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 02:51:34,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 02:51:34,339 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 02:51:34,339 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 02:51:34,340 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 02:51:34,340 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 02:51:34,340 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 02:51:34,340 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 02:51:34,341 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 02:51:34,341 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 02:51:34,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 02:51:34,342 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 02:51:34,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 02:51:34,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 02:51:34,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 02:51:34,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 02:51:34,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 02:51:34,343 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 02:51:34,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 02:51:34,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 02:51:34,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 02:51:34,344 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 02:51:34,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 02:51:34,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:51:34,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 02:51:34,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 02:51:34,344 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 02:51:34,345 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 02:51:34,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 02:51:34,345 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 02:51:34,383 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 02:51:34,396 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 02:51:34,401 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 02:51:34,405 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 02:51:34,405 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 02:51:34,406 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/McCarthy91-2.c [2019-09-10 02:51:34,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e735d48e/da36ee0b6cb5403bac4345e468acca4f/FLAG5677a0df0 [2019-09-10 02:51:34,947 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 02:51:34,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/McCarthy91-2.c [2019-09-10 02:51:34,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e735d48e/da36ee0b6cb5403bac4345e468acca4f/FLAG5677a0df0 [2019-09-10 02:51:35,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e735d48e/da36ee0b6cb5403bac4345e468acca4f [2019-09-10 02:51:35,279 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 02:51:35,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 02:51:35,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 02:51:35,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 02:51:35,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 02:51:35,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:51:35" (1/1) ... [2019-09-10 02:51:35,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3db0e7f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:35, skipping insertion in model container [2019-09-10 02:51:35,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:51:35" (1/1) ... [2019-09-10 02:51:35,298 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 02:51:35,314 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 02:51:35,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:51:35,521 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 02:51:35,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:51:35,549 INFO L192 MainTranslator]: Completed translation [2019-09-10 02:51:35,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:35 WrapperNode [2019-09-10 02:51:35,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 02:51:35,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 02:51:35,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 02:51:35,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 02:51:35,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:35" (1/1) ... [2019-09-10 02:51:35,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:35" (1/1) ... [2019-09-10 02:51:35,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:35" (1/1) ... [2019-09-10 02:51:35,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:35" (1/1) ... [2019-09-10 02:51:35,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:35" (1/1) ... [2019-09-10 02:51:35,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:35" (1/1) ... [2019-09-10 02:51:35,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:35" (1/1) ... [2019-09-10 02:51:35,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 02:51:35,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 02:51:35,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 02:51:35,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 02:51:35,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:35" (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 [2019-09-10 02:51:35,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 02:51:35,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 02:51:35,725 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2019-09-10 02:51:35,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 02:51:35,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 02:51:35,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 02:51:35,725 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2019-09-10 02:51:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 02:51:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 02:51:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 02:51:35,880 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 02:51:35,880 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 02:51:35,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:51:35 BoogieIcfgContainer [2019-09-10 02:51:35,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 02:51:35,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 02:51:35,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 02:51:35,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 02:51:35,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 02:51:35" (1/3) ... [2019-09-10 02:51:35,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d71f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:51:35, skipping insertion in model container [2019-09-10 02:51:35,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:35" (2/3) ... [2019-09-10 02:51:35,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d71f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:51:35, skipping insertion in model container [2019-09-10 02:51:35,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:51:35" (3/3) ... [2019-09-10 02:51:35,889 INFO L109 eAbstractionObserver]: Analyzing ICFG McCarthy91-2.c [2019-09-10 02:51:35,899 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 02:51:35,910 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 02:51:35,931 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 02:51:35,962 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 02:51:35,963 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 02:51:35,963 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 02:51:35,963 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 02:51:35,963 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 02:51:35,963 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 02:51:35,964 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 02:51:35,964 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 02:51:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-09-10 02:51:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-10 02:51:35,986 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:51:35,987 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:51:35,988 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:51:35,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:51:35,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1590359645, now seen corresponding path program 1 times [2019-09-10 02:51:35,995 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:51:36,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:51:36,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:51:36,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:51:36,041 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:51:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:51:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:51:36,424 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:51:36,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-10 02:51:36,424 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:51:36,429 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 02:51:36,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 02:51:36,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-10 02:51:36,445 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2019-09-10 02:51:36,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:51:36,588 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-09-10 02:51:36,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 02:51:36,591 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-09-10 02:51:36,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:51:36,604 INFO L225 Difference]: With dead ends: 28 [2019-09-10 02:51:36,604 INFO L226 Difference]: Without dead ends: 20 [2019-09-10 02:51:36,610 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-10 02:51:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-10 02:51:36,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-10 02:51:36,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-10 02:51:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-09-10 02:51:36,689 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2019-09-10 02:51:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:51:36,690 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-09-10 02:51:36,690 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 02:51:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-09-10 02:51:36,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-10 02:51:36,695 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:51:36,695 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:51:36,696 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:51:36,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:51:36,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2121223720, now seen corresponding path program 1 times [2019-09-10 02:51:36,698 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:51:36,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:51:36,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:51:36,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:51:36,703 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:51:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:51:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 02:51:36,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:51:36,956 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:51:36,958 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2019-09-10 02:51:36,960 INFO L207 CegarAbsIntRunner]: [0], [4], [6], [10], [12], [15], [18], [19], [21], [23], [24], [25], [26], [27], [29], [30], [31], [32], [33], [34] [2019-09-10 02:51:37,002 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:51:37,002 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:51:37,164 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:51:37,169 INFO L272 AbstractInterpreter]: Visited 20 different actions 160 times. Merged at 2 different actions 16 times. Never widened. Performed 166 root evaluator evaluations with a maximum evaluation depth of 6. Performed 166 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 12 fixpoints after 5 different actions. Largest state had 5 variables. [2019-09-10 02:51:37,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:51:37,172 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:51:37,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:51:37,173 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 [2019-09-10 02:51:37,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:51:37,186 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:51:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:51:37,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-10 02:51:37,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:51:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 02:51:37,278 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:51:37,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:51:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-10 02:51:37,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:51:37,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 15 [2019-09-10 02:51:37,722 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:51:37,723 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-10 02:51:37,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-10 02:51:37,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-09-10 02:51:37,725 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 11 states. [2019-09-10 02:51:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:51:37,912 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-09-10 02:51:37,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-10 02:51:37,913 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-09-10 02:51:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:51:37,913 INFO L225 Difference]: With dead ends: 18 [2019-09-10 02:51:37,914 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 02:51:37,915 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-09-10 02:51:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 02:51:37,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 02:51:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 02:51:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 02:51:37,916 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2019-09-10 02:51:37,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:51:37,916 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 02:51:37,916 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-10 02:51:37,917 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 02:51:37,917 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 02:51:37,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 02:51:37 BoogieIcfgContainer [2019-09-10 02:51:37,923 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 02:51:37,925 INFO L168 Benchmark]: Toolchain (without parser) took 2643.72 ms. Allocated memory was 134.7 MB in the beginning and 229.1 MB in the end (delta: 94.4 MB). Free memory was 91.5 MB in the beginning and 137.6 MB in the end (delta: -46.1 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2019-09-10 02:51:37,927 INFO L168 Benchmark]: CDTParser took 1.34 ms. Allocated memory is still 134.7 MB. Free memory was 109.3 MB in the beginning and 109.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 02:51:37,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.50 ms. Allocated memory is still 134.7 MB. Free memory was 91.3 MB in the beginning and 81.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-10 02:51:37,929 INFO L168 Benchmark]: Boogie Preprocessor took 117.29 ms. Allocated memory was 134.7 MB in the beginning and 201.3 MB in the end (delta: 66.6 MB). Free memory was 81.9 MB in the beginning and 178.1 MB in the end (delta: -96.2 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2019-09-10 02:51:37,930 INFO L168 Benchmark]: RCFGBuilder took 213.24 ms. Allocated memory is still 201.3 MB. Free memory was 178.1 MB in the beginning and 167.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-09-10 02:51:37,931 INFO L168 Benchmark]: TraceAbstraction took 2040.26 ms. Allocated memory was 201.3 MB in the beginning and 229.1 MB in the end (delta: 27.8 MB). Free memory was 167.1 MB in the beginning and 137.6 MB in the end (delta: 29.5 MB). Peak memory consumption was 57.3 MB. Max. memory is 7.1 GB. [2019-09-10 02:51:37,935 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.34 ms. Allocated memory is still 134.7 MB. Free memory was 109.3 MB in the beginning and 109.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 268.50 ms. Allocated memory is still 134.7 MB. Free memory was 91.3 MB in the beginning and 81.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.29 ms. Allocated memory was 134.7 MB in the beginning and 201.3 MB in the end (delta: 66.6 MB). Free memory was 81.9 MB in the beginning and 178.1 MB in the end (delta: -96.2 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 213.24 ms. Allocated memory is still 201.3 MB. Free memory was 178.1 MB in the beginning and 167.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2040.26 ms. Allocated memory was 201.3 MB in the beginning and 229.1 MB in the end (delta: 27.8 MB). Free memory was 167.1 MB in the beginning and 137.6 MB in the end (delta: 29.5 MB). Peak memory consumption was 57.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 30]: 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, 22 locations, 1 error locations. SAFE Result, 1.9s OverallTime, 2 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 15 SDslu, 110 SDs, 0 SdLazy, 130 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 7560 SizeOfPredicates, 6 NumberOfNonLiveVariables, 61 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 25/36 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...