/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:15:37,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:15:37,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:15:37,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:15:37,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:15:37,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:15:37,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:15:37,360 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:15:37,381 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:15:37,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:15:37,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:15:37,382 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:15:37,383 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:15:37,383 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:15:37,384 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:15:37,384 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:15:37,384 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:15:37,384 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:15:37,384 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:15:37,385 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:15:37,385 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:15:37,385 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:15:37,385 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:15:37,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:15:37,387 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:15:37,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:15:37,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:15:37,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:15:37,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:15:37,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:15:37,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:15:37,388 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:15:37,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:15:37,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:15:37,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:15:37,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:15:37,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:15:37,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:15:37,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:15:37,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:15:37,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:15:37,390 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:15:37,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:15:37,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:15:37,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:15:37,392 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:15:37,684 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:15:37,696 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:15:37,699 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:15:37,701 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:15:37,701 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:15:37,702 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2019-11-24 04:15:37,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e89e6831d/d31e1b45b9da49e7a7e08a77c2d96213/FLAG6e3c039fc [2019-11-24 04:15:38,203 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:15:38,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2019-11-24 04:15:38,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e89e6831d/d31e1b45b9da49e7a7e08a77c2d96213/FLAG6e3c039fc [2019-11-24 04:15:38,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e89e6831d/d31e1b45b9da49e7a7e08a77c2d96213 [2019-11-24 04:15:38,574 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:15:38,575 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:15:38,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:15:38,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:15:38,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:15:38,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:15:38" (1/1) ... [2019-11-24 04:15:38,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ba46b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:38, skipping insertion in model container [2019-11-24 04:15:38,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:15:38" (1/1) ... [2019-11-24 04:15:38,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:15:38,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:15:38,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:15:38,879 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:15:38,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:15:38,935 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:15:38,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:38 WrapperNode [2019-11-24 04:15:38,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:15:38,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:15:38,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:15:38,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:15:38,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:38" (1/1) ... [2019-11-24 04:15:39,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:38" (1/1) ... [2019-11-24 04:15:39,073 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:15:39,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:15:39,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:15:39,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:15:39,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:38" (1/1) ... [2019-11-24 04:15:39,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:38" (1/1) ... [2019-11-24 04:15:39,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:38" (1/1) ... [2019-11-24 04:15:39,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:38" (1/1) ... [2019-11-24 04:15:39,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:38" (1/1) ... [2019-11-24 04:15:39,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:38" (1/1) ... [2019-11-24 04:15:39,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:38" (1/1) ... [2019-11-24 04:15:39,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:15:39,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:15:39,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:15:39,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:15:39,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:15:39,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:15:39,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:15:39,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:15:39,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:15:39,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:15:39,510 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:15:39,511 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-24 04:15:39,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:15:39 BoogieIcfgContainer [2019-11-24 04:15:39,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:15:39,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:15:39,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:15:39,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:15:39,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:15:38" (1/3) ... [2019-11-24 04:15:39,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273b3fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:15:39, skipping insertion in model container [2019-11-24 04:15:39,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:38" (2/3) ... [2019-11-24 04:15:39,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273b3fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:15:39, skipping insertion in model container [2019-11-24 04:15:39,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:15:39" (3/3) ... [2019-11-24 04:15:39,525 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i [2019-11-24 04:15:39,533 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:15:39,538 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 04:15:39,549 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 04:15:39,571 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:15:39,572 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:15:39,572 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:15:39,572 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:15:39,572 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:15:39,572 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:15:39,572 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:15:39,572 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:15:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-11-24 04:15:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 04:15:39,589 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:39,590 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 04:15:39,590 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:39,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:39,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2692211, now seen corresponding path program 1 times [2019-11-24 04:15:39,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:39,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820353518] [2019-11-24 04:15:39,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:15:39,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820353518] [2019-11-24 04:15:39,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:15:39,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:15:39,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718611081] [2019-11-24 04:15:39,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:15:39,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:39,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:15:39,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:15:39,838 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2019-11-24 04:15:39,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:39,965 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2019-11-24 04:15:39,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:15:39,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-24 04:15:39,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:39,979 INFO L225 Difference]: With dead ends: 38 [2019-11-24 04:15:39,979 INFO L226 Difference]: Without dead ends: 21 [2019-11-24 04:15:39,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:15:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-24 04:15:40,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2019-11-24 04:15:40,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-24 04:15:40,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-24 04:15:40,022 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 4 [2019-11-24 04:15:40,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:40,022 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-24 04:15:40,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:15:40,022 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-24 04:15:40,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:15:40,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:40,023 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:15:40,023 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:40,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:40,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1659290896, now seen corresponding path program 1 times [2019-11-24 04:15:40,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:40,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892430751] [2019-11-24 04:15:40,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:15:40,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892430751] [2019-11-24 04:15:40,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:15:40,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:15:40,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463017797] [2019-11-24 04:15:40,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:15:40,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:15:40,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:40,121 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2019-11-24 04:15:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:40,132 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-11-24 04:15:40,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:15:40,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-24 04:15:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:40,134 INFO L225 Difference]: With dead ends: 21 [2019-11-24 04:15:40,134 INFO L226 Difference]: Without dead ends: 15 [2019-11-24 04:15:40,135 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:40,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-24 04:15:40,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-24 04:15:40,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-24 04:15:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-24 04:15:40,141 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2019-11-24 04:15:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:40,141 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-24 04:15:40,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:15:40,142 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-24 04:15:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:15:40,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:40,142 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-11-24 04:15:40,143 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:40,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:40,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1395913351, now seen corresponding path program 1 times [2019-11-24 04:15:40,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:40,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706917457] [2019-11-24 04:15:40,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:15:40,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706917457] [2019-11-24 04:15:40,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858762387] [2019-11-24 04:15:40,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:15:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:40,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-24 04:15:40,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:15:40,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:15:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:15:40,762 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:15:40,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:15:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:15:42,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [154225347] [2019-11-24 04:15:43,021 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-11-24 04:15:43,021 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:15:43,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:15:43,035 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:15:43,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:15:43,796 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:15:46,272 WARN L192 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 59 [2019-11-24 04:15:54,022 WARN L192 SmtUtils]: Spent 7.37 s on a formula simplification. DAG size of input: 155 DAG size of output: 62 [2019-11-24 04:15:54,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:15:54,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5, 5] total 13 [2019-11-24 04:15:54,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584039666] [2019-11-24 04:15:54,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:15:54,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:54,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:15:54,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=126, Unknown=1, NotChecked=0, Total=182 [2019-11-24 04:15:54,144 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2019-11-24 04:15:55,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:55,975 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-11-24 04:15:55,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:15:55,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-24 04:15:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:55,976 INFO L225 Difference]: With dead ends: 19 [2019-11-24 04:15:55,977 INFO L226 Difference]: Without dead ends: 17 [2019-11-24 04:15:55,977 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=55, Invalid=126, Unknown=1, NotChecked=0, Total=182 [2019-11-24 04:15:55,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-24 04:15:55,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 11. [2019-11-24 04:15:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-24 04:15:55,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-24 04:15:55,984 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2019-11-24 04:15:55,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:55,985 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-24 04:15:55,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:15:55,985 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-24 04:15:55,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:15:55,985 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:55,986 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:15:56,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:15:56,191 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:56,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:56,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1394472330, now seen corresponding path program 1 times [2019-11-24 04:15:56,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:56,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070045100] [2019-11-24 04:15:56,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:56,688 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2019-11-24 04:15:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:15:56,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070045100] [2019-11-24 04:15:56,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567112338] [2019-11-24 04:15:56,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:15:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:57,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-24 04:15:57,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:15:59,235 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse15 (mod (+ c_ULTIMATE.start_main_~index1~0 4294967295) 4294967296)) (.cse16 (+ c_ULTIMATE.start_main_~index2~0 1))) (let ((.cse10 (mod .cse16 4294967296)) (.cse8 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0.base|)) (.cse14 (* .cse15 4))) (let ((.cse0 (* 4294967296 (div .cse16 4294967296))) (.cse4 (< 2147483647 .cse15)) (.cse2 (<= .cse15 2147483647)) (.cse6 (mod (select .cse8 (+ .cse14 |c_ULTIMATE.start_main_~#array~0.offset| (- 17179869184))) 4294967296)) (.cse7 (mod (select .cse8 (+ .cse14 |c_ULTIMATE.start_main_~#array~0.offset|)) 4294967296)) (.cse9 (* .cse10 4))) (and (<= (+ c_ULTIMATE.start_main_~index1~0 .cse0) (+ (* 4294967296 (div (+ c_ULTIMATE.start_main_~index1~0 (- 1)) 4294967296)) c_ULTIMATE.start_main_~index2~0 1)) (or (let ((.cse5 (mod (select .cse8 (+ |c_ULTIMATE.start_main_~#array~0.offset| .cse9 (- 17179869184))) 4294967296))) (let ((.cse3 (= .cse7 .cse5)) (.cse1 (= .cse5 .cse6))) (and (or .cse1 .cse2 (not .cse3)) (or .cse3 (and .cse1 (or .cse4 (not .cse1))))))) (<= .cse10 2147483647)) (<= c_ULTIMATE.start_main_~index2~0 (+ .cse0 99998)) (or (let ((.cse13 (mod (select .cse8 (+ |c_ULTIMATE.start_main_~#array~0.offset| .cse9)) 4294967296))) (let ((.cse12 (= .cse7 .cse13)) (.cse11 (= .cse13 .cse6))) (and (or (and (or .cse4 (not .cse11)) .cse11) .cse12) (or (not .cse12) .cse2 .cse11)))) (< 2147483647 .cse10)))))) is different from false [2019-11-24 04:16:01,248 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse15 (mod (+ c_ULTIMATE.start_main_~index1~0 4294967295) 4294967296)) (.cse16 (+ c_ULTIMATE.start_main_~index2~0 1))) (let ((.cse10 (mod .cse16 4294967296)) (.cse8 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0.base|)) (.cse14 (* .cse15 4))) (let ((.cse0 (* 4294967296 (div .cse16 4294967296))) (.cse4 (< 2147483647 .cse15)) (.cse2 (<= .cse15 2147483647)) (.cse6 (mod (select .cse8 (+ .cse14 |c_ULTIMATE.start_main_~#array~0.offset| (- 17179869184))) 4294967296)) (.cse7 (mod (select .cse8 (+ .cse14 |c_ULTIMATE.start_main_~#array~0.offset|)) 4294967296)) (.cse9 (* .cse10 4))) (and (<= (+ c_ULTIMATE.start_main_~index1~0 .cse0) (+ (* 4294967296 (div (+ c_ULTIMATE.start_main_~index1~0 (- 1)) 4294967296)) c_ULTIMATE.start_main_~index2~0 1)) (or (let ((.cse5 (mod (select .cse8 (+ |c_ULTIMATE.start_main_~#array~0.offset| .cse9 (- 17179869184))) 4294967296))) (let ((.cse3 (= .cse7 .cse5)) (.cse1 (= .cse5 .cse6))) (and (or .cse1 .cse2 (not .cse3)) (or .cse3 (and .cse1 (or .cse4 (not .cse1))))))) (<= .cse10 2147483647)) (<= (mod c_ULTIMATE.start_main_~index2~0 4294967296) (mod c_ULTIMATE.start_main_~index1~0 4294967296)) (<= c_ULTIMATE.start_main_~index2~0 (+ .cse0 99998)) (or (let ((.cse13 (mod (select .cse8 (+ |c_ULTIMATE.start_main_~#array~0.offset| .cse9)) 4294967296))) (let ((.cse12 (= .cse7 .cse13)) (.cse11 (= .cse13 .cse6))) (and (or (and (or .cse4 (not .cse11)) .cse11) .cse12) (or (not .cse12) .cse2 .cse11)))) (< 2147483647 .cse10)))))) is different from false [2019-11-24 04:16:41,129 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:16:41,137 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:16:41,139 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:16:41,159 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:16:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2019-11-24 04:16:41,174 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:16:41,805 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:41,836 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:41,898 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:42,300 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:42,678 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2019-11-24 04:16:42,888 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:45,130 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (let ((.cse0 (select |#memory_int| |ULTIMATE.start_main_~#array~0.base|))) (= (select .cse0 (+ (* (mod (+ ULTIMATE.start_main_~index1~0 1) 4294967296) 4) |ULTIMATE.start_main_~#array~0.offset| (- 17179869184))) (select .cse0 (+ (* (mod ULTIMATE.start_main_~index2~0 4294967296) 4) |ULTIMATE.start_main_~#array~0.offset| (- 17179869184))))) [2019-11-24 04:16:47,213 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (let ((.cse0 (select |#memory_int| |ULTIMATE.start_main_~#array~0.base|))) (= (select .cse0 (+ (* (mod ULTIMATE.start_main_~index1~0 4294967296) 4) |ULTIMATE.start_main_~#array~0.offset| (- 17179869184))) (select .cse0 (+ (* (mod (+ ULTIMATE.start_main_~index1~0 1) 4294967296) 4) |ULTIMATE.start_main_~#array~0.offset| (- 17179869184))))) [2019-11-24 04:16:47,414 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:47,425 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:47,491 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:47,510 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:47,897 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:47,928 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,247 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,255 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,434 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,519 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,530 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,590 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,599 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,613 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,683 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,732 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,828 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,835 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,842 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,856 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,867 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,875 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,900 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:48,915 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:49,005 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:49,031 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:49,043 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:49,048 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-24 04:16:53,261 WARN L192 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 48 DAG size of output: 19 [2019-11-24 04:16:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:16:53,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-24 04:16:53,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 11 [2019-11-24 04:16:53,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212909523] [2019-11-24 04:16:53,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:16:53,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:16:53,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:16:53,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=53, Unknown=2, NotChecked=30, Total=110 [2019-11-24 04:16:53,340 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2019-11-24 04:16:54,310 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-11-24 04:16:54,618 WARN L192 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2019-11-24 04:16:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:16:54,948 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2019-11-24 04:16:54,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:16:54,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-24 04:16:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:16:54,950 INFO L225 Difference]: With dead ends: 16 [2019-11-24 04:16:54,951 INFO L226 Difference]: Without dead ends: 14 [2019-11-24 04:16:54,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=41, Invalid=97, Unknown=2, NotChecked=42, Total=182 [2019-11-24 04:16:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-24 04:16:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-11-24 04:16:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-24 04:16:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-24 04:16:54,956 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2019-11-24 04:16:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:16:54,957 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-24 04:16:54,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:16:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-24 04:16:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:16:54,958 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:16:54,958 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:16:55,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:16:55,162 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:16:55,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:16:55,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1796662928, now seen corresponding path program 1 times [2019-11-24 04:16:55,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:16:55,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849881956] [2019-11-24 04:16:55,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:16:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:16:58,557 WARN L192 SmtUtils]: Spent 925.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2019-11-24 04:17:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:17:02,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849881956] [2019-11-24 04:17:02,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21536948] [2019-11-24 04:17:02,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:17:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:17:02,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-24 04:17:02,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:17:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:17:06,201 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:17:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:17:10,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [772131928] [2019-11-24 04:17:10,419 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-24 04:17:10,419 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:17:10,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:17:10,420 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:17:10,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:17:11,059 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 8096 conjuctions. This might take some time... [2019-11-24 04:17:17,632 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 8096 conjuctions. This might take some time...