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/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 01:40:20,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 01:40:20,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 01:40:20,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 01:40:20,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 01:40:20,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 01:40:20,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 01:40:20,534 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 01:40:20,557 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 01:40:20,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 01:40:20,558 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 01:40:20,559 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 01:40:20,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 01:40:20,559 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 01:40:20,560 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 01:40:20,560 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 01:40:20,560 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 01:40:20,561 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 01:40:20,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 01:40:20,563 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 01:40:20,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 01:40:20,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 01:40:20,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 01:40:20,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 01:40:20,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 01:40:20,564 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 01:40:20,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 01:40:20,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 01:40:20,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 01:40:20,565 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 01:40:20,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 01:40:20,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:40:20,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 01:40:20,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 01:40:20,566 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 01:40:20,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 01:40:20,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 01:40:20,567 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 01:40:20,597 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 01:40:20,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 01:40:20,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 01:40:20,619 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 01:40:20,620 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 01:40:20,620 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2019-09-10 01:40:20,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09c4be790/c5e53cfb4c0e47d2b659bf3d88ccf394/FLAGd0eb4121f [2019-09-10 01:40:21,066 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 01:40:21,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2019-09-10 01:40:21,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09c4be790/c5e53cfb4c0e47d2b659bf3d88ccf394/FLAGd0eb4121f [2019-09-10 01:40:21,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09c4be790/c5e53cfb4c0e47d2b659bf3d88ccf394 [2019-09-10 01:40:21,093 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 01:40:21,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 01:40:21,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 01:40:21,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 01:40:21,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 01:40:21,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:40:21" (1/1) ... [2019-09-10 01:40:21,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2243a972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:21, skipping insertion in model container [2019-09-10 01:40:21,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:40:21" (1/1) ... [2019-09-10 01:40:21,110 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 01:40:21,124 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 01:40:21,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:40:21,268 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 01:40:21,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:40:21,294 INFO L192 MainTranslator]: Completed translation [2019-09-10 01:40:21,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:21 WrapperNode [2019-09-10 01:40:21,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 01:40:21,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 01:40:21,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 01:40:21,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 01:40:21,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:21" (1/1) ... [2019-09-10 01:40:21,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:21" (1/1) ... [2019-09-10 01:40:21,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:21" (1/1) ... [2019-09-10 01:40:21,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:21" (1/1) ... [2019-09-10 01:40:21,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:21" (1/1) ... [2019-09-10 01:40:21,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:21" (1/1) ... [2019-09-10 01:40:21,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:21" (1/1) ... [2019-09-10 01:40:21,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 01:40:21,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 01:40:21,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 01:40:21,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 01:40:21,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:21" (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 01:40:21,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 01:40:21,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 01:40:21,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 01:40:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 01:40:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 01:40:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 01:40:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 01:40:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 01:40:21,621 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 01:40:21,623 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 01:40:21,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:40:21 BoogieIcfgContainer [2019-09-10 01:40:21,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 01:40:21,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 01:40:21,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 01:40:21,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 01:40:21,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 01:40:21" (1/3) ... [2019-09-10 01:40:21,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51af997f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:40:21, skipping insertion in model container [2019-09-10 01:40:21,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:21" (2/3) ... [2019-09-10 01:40:21,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51af997f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:40:21, skipping insertion in model container [2019-09-10 01:40:21,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:40:21" (3/3) ... [2019-09-10 01:40:21,638 INFO L109 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i.p+cfa-reducer.c [2019-09-10 01:40:21,647 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 01:40:21,658 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 01:40:21,676 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 01:40:21,703 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 01:40:21,703 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 01:40:21,703 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 01:40:21,703 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 01:40:21,704 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 01:40:21,704 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 01:40:21,704 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 01:40:21,704 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 01:40:21,718 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-09-10 01:40:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-09-10 01:40:21,730 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:21,730 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:21,732 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:21,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:21,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1301230683, now seen corresponding path program 1 times [2019-09-10 01:40:21,738 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:21,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:21,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:21,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:21,775 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:21,878 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 01:40:21,880 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:40:21,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 01:40:21,881 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:40:21,885 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 01:40:21,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 01:40:21,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:40:21,899 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2019-09-10 01:40:21,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:21,937 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-10 01:40:21,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 01:40:21,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-09-10 01:40:21,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:21,950 INFO L225 Difference]: With dead ends: 15 [2019-09-10 01:40:21,963 INFO L226 Difference]: Without dead ends: 11 [2019-09-10 01:40:21,969 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:40:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-09-10 01:40:22,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-09-10 01:40:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-09-10 01:40:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-09-10 01:40:22,022 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2019-09-10 01:40:22,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:22,023 INFO L475 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-09-10 01:40:22,023 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 01:40:22,023 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-09-10 01:40:22,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-10 01:40:22,024 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:22,024 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:22,024 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:22,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:22,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1683383028, now seen corresponding path program 1 times [2019-09-10 01:40:22,025 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:22,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:22,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:22,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:22,026 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:22,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:22,068 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:22,069 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 11 with the following transitions: [2019-09-10 01:40:22,071 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [11], [14], [15], [19], [20], [21] [2019-09-10 01:40:22,103 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:40:22,104 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:40:22,199 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPLT has no precise implementation. [2019-09-10 01:40:22,200 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPGT has no precise implementation. [2019-09-10 01:40:22,258 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 01:40:22,261 INFO L272 AbstractInterpreter]: Visited 10 different actions 22 times. Merged at 4 different actions 10 times. Widened at 1 different actions 1 times. Performed 69 root evaluator evaluations with a maximum evaluation depth of 3. Performed 69 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2019-09-10 01:40:22,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:22,265 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 01:40:22,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:22,266 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 01:40:22,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:22,282 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 01:40:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:22,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-10 01:40:22,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:22,363 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:22,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:22,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-09-10 01:40:22,414 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:22,414 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 01:40:22,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 01:40:22,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-10 01:40:22,415 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2019-09-10 01:40:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:22,454 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-09-10 01:40:22,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 01:40:22,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-10 01:40:22,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:22,456 INFO L225 Difference]: With dead ends: 12 [2019-09-10 01:40:22,456 INFO L226 Difference]: Without dead ends: 12 [2019-09-10 01:40:22,457 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-10 01:40:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-10 01:40:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-10 01:40:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-10 01:40:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-09-10 01:40:22,463 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-09-10 01:40:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:22,463 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-09-10 01:40:22,464 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 01:40:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-09-10 01:40:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-10 01:40:22,465 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:22,466 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:22,466 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:22,467 INFO L82 PathProgramCache]: Analyzing trace with hash 645203835, now seen corresponding path program 2 times [2019-09-10 01:40:22,468 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:22,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:22,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:22,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:22,473 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:22,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:22,555 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:22,556 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:22,556 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:22,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:22,556 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 [2019-09-10 01:40:22,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 01:40:22,575 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-10 01:40:22,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-10 01:40:22,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:40:22,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-10 01:40:22,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:22,622 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:40:22,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:22,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2019-09-10 01:40:22,674 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:22,674 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 01:40:22,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 01:40:22,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-10 01:40:22,675 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2019-09-10 01:40:22,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:22,731 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-09-10 01:40:22,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 01:40:22,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-09-10 01:40:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:22,732 INFO L225 Difference]: With dead ends: 13 [2019-09-10 01:40:22,732 INFO L226 Difference]: Without dead ends: 13 [2019-09-10 01:40:22,733 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-09-10 01:40:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-10 01:40:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-10 01:40:22,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-10 01:40:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-10 01:40:22,736 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-10 01:40:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:22,737 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-10 01:40:22,737 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 01:40:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-10 01:40:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-10 01:40:22,738 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:22,738 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:22,739 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:22,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1473580076, now seen corresponding path program 3 times [2019-09-10 01:40:22,739 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:22,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:22,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 01:40:22,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:22,741 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:22,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:22,824 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:22,825 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:22,825 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:22,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:22,825 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) [2019-09-10 01:40:22,851 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-10 01:40:22,851 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 [2019-09-10 01:40:22,869 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-10 01:40:22,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:40:22,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-10 01:40:22,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:22,919 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-10 01:40:22,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:22,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2019-09-10 01:40:22,952 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:22,953 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-10 01:40:22,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-10 01:40:22,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-09-10 01:40:22,954 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2019-09-10 01:40:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:23,036 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-09-10 01:40:23,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 01:40:23,037 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-09-10 01:40:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:23,037 INFO L225 Difference]: With dead ends: 14 [2019-09-10 01:40:23,037 INFO L226 Difference]: Without dead ends: 14 [2019-09-10 01:40:23,038 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-09-10 01:40:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-10 01:40:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-10 01:40:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-10 01:40:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-10 01:40:23,041 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-10 01:40:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:23,041 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-10 01:40:23,041 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-10 01:40:23,041 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-10 01:40:23,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-10 01:40:23,042 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:23,042 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:23,042 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:23,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:23,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1563595419, now seen corresponding path program 4 times [2019-09-10 01:40:23,043 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:23,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:23,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 01:40:23,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:23,044 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:23,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:23,107 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:23,108 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:23,108 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:23,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:23,108 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) [2019-09-10 01:40:23,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:23,131 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:40:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:23,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-10 01:40:23,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:23,204 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-10 01:40:23,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:23,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4] total 10 [2019-09-10 01:40:23,250 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:23,251 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-10 01:40:23,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-10 01:40:23,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-10 01:40:23,252 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2019-09-10 01:40:23,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:23,324 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-10 01:40:23,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 01:40:23,324 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-09-10 01:40:23,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:23,325 INFO L225 Difference]: With dead ends: 15 [2019-09-10 01:40:23,325 INFO L226 Difference]: Without dead ends: 15 [2019-09-10 01:40:23,326 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-09-10 01:40:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-10 01:40:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-10 01:40:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-10 01:40:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-10 01:40:23,328 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-10 01:40:23,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:23,329 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-10 01:40:23,329 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-10 01:40:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-10 01:40:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-10 01:40:23,329 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:23,330 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:23,330 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:23,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1226755252, now seen corresponding path program 5 times [2019-09-10 01:40:23,330 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:23,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:23,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:23,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:23,332 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:23,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:23,392 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:23,392 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:23,392 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:23,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:23,392 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:40:23,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 01:40:23,415 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-10 01:40:23,425 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-10 01:40:23,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:40:23,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-10 01:40:23,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-10 01:40:23,469 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-10 01:40:23,512 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-10 01:40:23,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [8] total 12 [2019-09-10 01:40:23,513 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:40:23,513 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-10 01:40:23,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-10 01:40:23,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-09-10 01:40:23,514 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2019-09-10 01:40:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:23,537 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-09-10 01:40:23,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 01:40:23,537 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-09-10 01:40:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:23,538 INFO L225 Difference]: With dead ends: 13 [2019-09-10 01:40:23,538 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 01:40:23,540 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-09-10 01:40:23,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 01:40:23,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 01:40:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 01:40:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 01:40:23,542 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-09-10 01:40:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:23,542 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 01:40:23,542 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-10 01:40:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 01:40:23,542 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 01:40:23,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 01:40:23 BoogieIcfgContainer [2019-09-10 01:40:23,549 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 01:40:23,555 INFO L168 Benchmark]: Toolchain (without parser) took 2456.49 ms. Allocated memory was 133.2 MB in the beginning and 226.5 MB in the end (delta: 93.3 MB). Free memory was 89.5 MB in the beginning and 134.6 MB in the end (delta: -45.1 MB). Peak memory consumption was 48.2 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:23,557 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 133.2 MB. Free memory was 107.6 MB in the beginning and 107.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 01:40:23,559 INFO L168 Benchmark]: CACSL2BoogieTranslator took 200.00 ms. Allocated memory is still 133.2 MB. Free memory was 89.3 MB in the beginning and 80.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:23,560 INFO L168 Benchmark]: Boogie Preprocessor took 108.30 ms. Allocated memory was 133.2 MB in the beginning and 201.3 MB in the end (delta: 68.2 MB). Free memory was 80.0 MB in the beginning and 177.9 MB in the end (delta: -97.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:23,561 INFO L168 Benchmark]: RCFGBuilder took 220.00 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 168.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:23,565 INFO L168 Benchmark]: TraceAbstraction took 1924.06 ms. Allocated memory was 201.3 MB in the beginning and 226.5 MB in the end (delta: 25.2 MB). Free memory was 167.7 MB in the beginning and 134.6 MB in the end (delta: 33.1 MB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:23,572 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 133.2 MB. Free memory was 107.6 MB in the beginning and 107.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 200.00 ms. Allocated memory is still 133.2 MB. Free memory was 89.3 MB in the beginning and 80.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.30 ms. Allocated memory was 133.2 MB in the beginning and 201.3 MB in the end (delta: 68.2 MB). Free memory was 80.0 MB in the beginning and 177.9 MB in the end (delta: -97.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 220.00 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 168.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1924.06 ms. Allocated memory was 201.3 MB in the beginning and 226.5 MB in the end (delta: 25.2 MB). Free memory was 167.7 MB in the beginning and 134.6 MB in the end (delta: 33.1 MB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. SAFE Result, 1.8s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 55 SDtfs, 1 SDslu, 120 SDs, 0 SdLazy, 40 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 98 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 129 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 173 ConstructedInterpolants, 0 QuantifiedInterpolants, 3592 SizeOfPredicates, 22 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 40/105 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...