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/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 17:03:52,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 17:03:52,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 17:03:52,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-16 17:03:52,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 17:03:52,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 17:03:52,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 17:03:52,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 17:03:52,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 17:03:52,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 17:03:52,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 17:03:52,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 17:03:52,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 17:03:52,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 17:03:52,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 17:03:52,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 17:03:52,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 17:03:52,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 17:03:52,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 17:03:52,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 17:03:52,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 17:03:52,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 17:03:52,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 17:03:52,303 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 17:03:52,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 17:03:52,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 17:03:52,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 17:03:52,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 17:03:52,306 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 17:03:52,321 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 17:03:52,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 17:03:52,322 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-16 17:03:52,322 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-16 17:03:52,323 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-16 17:03:52,323 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-16 17:03:52,323 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-16 17:03:52,323 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-16 17:03:52,323 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-16 17:03:52,324 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-16 17:03:52,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 17:03:52,324 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 17:03:52,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 17:03:52,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 17:03:52,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 17:03:52,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 17:03:52,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 17:03:52,326 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 17:03:52,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 17:03:52,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 17:03:52,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 17:03:52,327 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-16 17:03:52,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 17:03:52,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:03:52,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 17:03:52,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 17:03:52,328 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-16 17:03:52,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 17:03:52,328 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 17:03:52,328 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-16 17:03:52,374 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 17:03:52,390 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 17:03:52,396 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 17:03:52,397 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 17:03:52,398 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 17:03:52,399 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2019-09-16 17:03:52,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cd63034f/5a8dead58ed14e19a5459a8b6b67ef42/FLAG8ca5b317c [2019-09-16 17:03:52,944 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 17:03:52,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2019-09-16 17:03:52,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cd63034f/5a8dead58ed14e19a5459a8b6b67ef42/FLAG8ca5b317c [2019-09-16 17:03:53,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cd63034f/5a8dead58ed14e19a5459a8b6b67ef42 [2019-09-16 17:03:53,368 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 17:03:53,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 17:03:53,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 17:03:53,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 17:03:53,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 17:03:53,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:03:53" (1/1) ... [2019-09-16 17:03:53,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a8b6e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:53, skipping insertion in model container [2019-09-16 17:03:53,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:03:53" (1/1) ... [2019-09-16 17:03:53,385 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 17:03:53,401 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 17:03:53,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:03:53,594 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 17:03:53,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:03:53,625 INFO L192 MainTranslator]: Completed translation [2019-09-16 17:03:53,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:53 WrapperNode [2019-09-16 17:03:53,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 17:03:53,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 17:03:53,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 17:03:53,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 17:03:53,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:53" (1/1) ... [2019-09-16 17:03:53,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:53" (1/1) ... [2019-09-16 17:03:53,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:53" (1/1) ... [2019-09-16 17:03:53,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:53" (1/1) ... [2019-09-16 17:03:53,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:53" (1/1) ... [2019-09-16 17:03:53,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:53" (1/1) ... [2019-09-16 17:03:53,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:53" (1/1) ... [2019-09-16 17:03:53,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 17:03:53,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 17:03:53,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 17:03:53,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 17:03:53,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:53" (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 17:03:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 17:03:53,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 17:03:53,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 17:03:53,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 17:03:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 17:03:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 17:03:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 17:03:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 17:03:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 17:03:54,015 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 17:03:54,016 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-16 17:03:54,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:03:54 BoogieIcfgContainer [2019-09-16 17:03:54,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 17:03:54,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 17:03:54,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 17:03:54,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 17:03:54,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 05:03:53" (1/3) ... [2019-09-16 17:03:54,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597bcb5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:03:54, skipping insertion in model container [2019-09-16 17:03:54,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:53" (2/3) ... [2019-09-16 17:03:54,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597bcb5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:03:54, skipping insertion in model container [2019-09-16 17:03:54,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:03:54" (3/3) ... [2019-09-16 17:03:54,025 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2019-09-16 17:03:54,035 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 17:03:54,043 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 17:03:54,060 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 17:03:54,086 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 17:03:54,086 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-16 17:03:54,086 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 17:03:54,086 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 17:03:54,087 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 17:03:54,087 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 17:03:54,087 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 17:03:54,087 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 17:03:54,100 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-09-16 17:03:54,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-16 17:03:54,109 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:54,110 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:54,112 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:54,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:54,117 INFO L82 PathProgramCache]: Analyzing trace with hash -84144223, now seen corresponding path program 1 times [2019-09-16 17:03:54,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:54,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:54,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:54,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:54,167 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:54,239 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 17:03:54,241 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:54,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 17:03:54,241 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:54,245 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 17:03:54,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 17:03:54,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:03:54,259 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-09-16 17:03:54,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:54,275 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-09-16 17:03:54,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 17:03:54,276 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2019-09-16 17:03:54,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:54,285 INFO L225 Difference]: With dead ends: 26 [2019-09-16 17:03:54,285 INFO L226 Difference]: Without dead ends: 22 [2019-09-16 17:03:54,287 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:03:54,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-16 17:03:54,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-16 17:03:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-16 17:03:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-09-16 17:03:54,323 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2019-09-16 17:03:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:54,324 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-09-16 17:03:54,324 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 17:03:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-09-16 17:03:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-16 17:03:54,325 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:54,325 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:54,326 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:54,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:54,326 INFO L82 PathProgramCache]: Analyzing trace with hash -89685349, now seen corresponding path program 1 times [2019-09-16 17:03:54,326 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:54,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:54,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:54,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:54,329 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:54,447 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 17:03:54,448 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:54,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 17:03:54,448 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:54,452 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 17:03:54,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 17:03:54,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 17:03:54,453 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2019-09-16 17:03:54,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:54,489 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2019-09-16 17:03:54,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 17:03:54,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-09-16 17:03:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:54,491 INFO L225 Difference]: With dead ends: 31 [2019-09-16 17:03:54,491 INFO L226 Difference]: Without dead ends: 31 [2019-09-16 17:03:54,493 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 17:03:54,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-16 17:03:54,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-09-16 17:03:54,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-16 17:03:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-09-16 17:03:54,499 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2019-09-16 17:03:54,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:54,499 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-09-16 17:03:54,499 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 17:03:54,500 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-09-16 17:03:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-16 17:03:54,500 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:54,500 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:54,501 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:54,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:54,502 INFO L82 PathProgramCache]: Analyzing trace with hash 374245081, now seen corresponding path program 1 times [2019-09-16 17:03:54,502 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:54,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:54,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:54,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:54,505 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:54,649 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 17:03:54,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:54,650 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:54,651 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-09-16 17:03:54,657 INFO L207 CegarAbsIntRunner]: [0], [4], [12], [20], [28], [36], [42], [44], [46], [69], [72], [74], [80], [81], [82], [84] [2019-09-16 17:03:54,687 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-16 17:03:54,687 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-16 17:03:54,745 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-16 17:03:54,998 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-16 17:03:55,001 INFO L272 AbstractInterpreter]: Visited 16 different actions 72 times. Merged at 3 different actions 24 times. Widened at 1 different actions 6 times. Performed 108 root evaluator evaluations with a maximum evaluation depth of 12. Performed 108 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2019-09-16 17:03:55,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:55,006 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-16 17:03:55,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:55,007 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 17:03:55,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:55,046 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-16 17:03:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:55,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-16 17:03:55,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:55,148 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 17:03:55,149 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:55,209 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 17:03:55,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:55,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-09-16 17:03:55,215 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:55,216 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 17:03:55,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 17:03:55,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-09-16 17:03:55,217 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2019-09-16 17:03:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:55,270 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-09-16 17:03:55,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 17:03:55,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-09-16 17:03:55,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:55,275 INFO L225 Difference]: With dead ends: 33 [2019-09-16 17:03:55,275 INFO L226 Difference]: Without dead ends: 33 [2019-09-16 17:03:55,276 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-09-16 17:03:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-16 17:03:55,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2019-09-16 17:03:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-16 17:03:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-09-16 17:03:55,281 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2019-09-16 17:03:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:55,281 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-09-16 17:03:55,281 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 17:03:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-09-16 17:03:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-16 17:03:55,282 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:55,283 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:55,283 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:55,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:55,284 INFO L82 PathProgramCache]: Analyzing trace with hash -465210473, now seen corresponding path program 2 times [2019-09-16 17:03:55,284 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:55,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:55,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:55,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:55,286 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:55,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:55,406 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:55,407 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-16 17:03:55,407 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-16 17:03:55,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:55,408 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:03:55,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 17:03:55,439 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-16 17:03:55,461 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-16 17:03:55,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 17:03:55,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-16 17:03:55,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:55,493 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:55,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:55,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2019-09-16 17:03:55,559 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:55,559 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-16 17:03:55,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-16 17:03:55,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-09-16 17:03:55,561 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2019-09-16 17:03:55,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:55,639 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2019-09-16 17:03:55,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 17:03:55,642 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-09-16 17:03:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:55,644 INFO L225 Difference]: With dead ends: 35 [2019-09-16 17:03:55,644 INFO L226 Difference]: Without dead ends: 35 [2019-09-16 17:03:55,645 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-09-16 17:03:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-16 17:03:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2019-09-16 17:03:55,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-16 17:03:55,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-16 17:03:55,654 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2019-09-16 17:03:55,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:55,656 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-16 17:03:55,656 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-16 17:03:55,656 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-16 17:03:55,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-16 17:03:55,659 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:55,659 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:55,659 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:55,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:55,660 INFO L82 PathProgramCache]: Analyzing trace with hash 271853781, now seen corresponding path program 3 times [2019-09-16 17:03:55,660 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:55,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:55,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 17:03:55,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:55,662 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:55,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:55,790 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:55,791 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-16 17:03:55,791 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-16 17:03:55,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:55,791 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-16 17:03:55,811 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 17:03:55,811 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:03:55,829 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 17:03:55,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 17:03:55,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-16 17:03:55,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:55,868 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:55,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:55,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2019-09-16 17:03:55,963 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:55,963 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-16 17:03:55,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-16 17:03:55,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-09-16 17:03:55,968 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2019-09-16 17:03:56,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:56,041 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2019-09-16 17:03:56,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-16 17:03:56,042 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-09-16 17:03:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:56,043 INFO L225 Difference]: With dead ends: 37 [2019-09-16 17:03:56,045 INFO L226 Difference]: Without dead ends: 37 [2019-09-16 17:03:56,046 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-09-16 17:03:56,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-16 17:03:56,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-09-16 17:03:56,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-16 17:03:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-16 17:03:56,053 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2019-09-16 17:03:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:56,054 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-16 17:03:56,054 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-16 17:03:56,055 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-16 17:03:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-16 17:03:56,057 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:56,057 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:56,057 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:56,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:56,058 INFO L82 PathProgramCache]: Analyzing trace with hash -79001965, now seen corresponding path program 4 times [2019-09-16 17:03:56,058 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:56,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:56,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 17:03:56,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:56,061 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:56,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:56,228 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:56,228 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-16 17:03:56,228 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-16 17:03:56,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:56,229 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:03:56,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:56,259 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-16 17:03:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:56,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-16 17:03:56,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:56,318 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:03:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:56,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-16 17:03:56,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2019-09-16 17:03:56,444 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:03:56,444 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-16 17:03:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-16 17:03:56,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-09-16 17:03:56,445 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-09-16 17:03:56,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:56,530 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-09-16 17:03:56,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 17:03:56,532 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-09-16 17:03:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:56,533 INFO L225 Difference]: With dead ends: 39 [2019-09-16 17:03:56,533 INFO L226 Difference]: Without dead ends: 39 [2019-09-16 17:03:56,533 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-09-16 17:03:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-16 17:03:56,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2019-09-16 17:03:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-16 17:03:56,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-16 17:03:56,542 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2019-09-16 17:03:56,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:56,543 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-16 17:03:56,543 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-16 17:03:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-16 17:03:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-16 17:03:56,545 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:56,545 INFO L407 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:56,545 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:56,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:56,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2051042513, now seen corresponding path program 5 times [2019-09-16 17:03:56,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:56,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:56,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:56,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:56,549 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:56,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:56,718 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:56,718 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-16 17:03:56,719 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-16 17:03:56,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:56,719 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-16 17:03:56,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 17:03:56,744 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:03:56,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-16 17:03:56,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 17:03:56,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-16 17:03:56,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:03:57,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 17:03:57,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 17:03:57,066 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 17:03:57,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 17:03:57,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 17:04:00,892 WARN L191 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 19 [2019-09-16 17:04:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-16 17:04:03,287 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:04:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-16 17:04:03,760 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-16 17:04:03,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [8] total 18 [2019-09-16 17:04:03,761 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:04:03,761 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-16 17:04:03,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-16 17:04:03,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-09-16 17:04:03,762 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2019-09-16 17:04:05,402 WARN L191 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-09-16 17:04:05,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:04:05,607 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-09-16 17:04:05,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-16 17:04:05,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-09-16 17:04:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:04:05,612 INFO L225 Difference]: With dead ends: 36 [2019-09-16 17:04:05,612 INFO L226 Difference]: Without dead ends: 0 [2019-09-16 17:04:05,613 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=90, Invalid=289, Unknown=1, NotChecked=0, Total=380 [2019-09-16 17:04:05,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-16 17:04:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-16 17:04:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-16 17:04:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-16 17:04:05,614 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2019-09-16 17:04:05,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:04:05,614 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-16 17:04:05,614 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-16 17:04:05,615 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-16 17:04:05,615 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-16 17:04:05,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 05:04:05 BoogieIcfgContainer [2019-09-16 17:04:05,622 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 17:04:05,624 INFO L168 Benchmark]: Toolchain (without parser) took 12254.34 ms. Allocated memory was 132.1 MB in the beginning and 262.7 MB in the end (delta: 130.5 MB). Free memory was 88.3 MB in the beginning and 171.1 MB in the end (delta: -82.8 MB). Peak memory consumption was 47.7 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:05,625 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 132.1 MB. Free memory was 106.3 MB in the beginning and 106.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 17:04:05,626 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.99 ms. Allocated memory is still 132.1 MB. Free memory was 88.1 MB in the beginning and 78.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:05,627 INFO L168 Benchmark]: Boogie Preprocessor took 124.01 ms. Allocated memory was 132.1 MB in the beginning and 199.2 MB in the end (delta: 67.1 MB). Free memory was 78.5 MB in the beginning and 175.6 MB in the end (delta: -97.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:05,628 INFO L168 Benchmark]: RCFGBuilder took 266.40 ms. Allocated memory is still 199.2 MB. Free memory was 175.6 MB in the beginning and 162.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:05,629 INFO L168 Benchmark]: TraceAbstraction took 11603.91 ms. Allocated memory was 199.2 MB in the beginning and 262.7 MB in the end (delta: 63.4 MB). Free memory was 162.0 MB in the beginning and 171.1 MB in the end (delta: -9.1 MB). Peak memory consumption was 54.3 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:05,636 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 132.1 MB. Free memory was 106.3 MB in the beginning and 106.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.99 ms. Allocated memory is still 132.1 MB. Free memory was 88.1 MB in the beginning and 78.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.01 ms. Allocated memory was 132.1 MB in the beginning and 199.2 MB in the end (delta: 67.1 MB). Free memory was 78.5 MB in the beginning and 175.6 MB in the end (delta: -97.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 266.40 ms. Allocated memory is still 199.2 MB. Free memory was 175.6 MB in the beginning and 162.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11603.91 ms. Allocated memory was 199.2 MB in the beginning and 262.7 MB in the end (delta: 63.4 MB). Free memory was 162.0 MB in the beginning and 171.1 MB in the end (delta: -9.1 MB). Peak memory consumption was 54.3 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, 26 locations, 1 error locations. SAFE Result, 11.5s OverallTime, 7 OverallIterations, 5 TraceHistogramMax, 2.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 178 SDtfs, 87 SDslu, 486 SDs, 0 SdLazy, 202 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 177 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=6, 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, 7 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 228 NumberOfCodeBlocks, 222 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 311 ConstructedInterpolants, 2 QuantifiedInterpolants, 18538 SizeOfPredicates, 7 NumberOfNonLiveVariables, 246 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 50/165 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...