/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/heap-data/running_example.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 00:37:42,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 00:37:42,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 00:37:42,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 00:37:42,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 00:37:42,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 00:37:42,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 00:37:42,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 00:37:42,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 00:37:42,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 00:37:42,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 00:37:42,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 00:37:42,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 00:37:42,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 00:37:42,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 00:37:42,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 00:37:42,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 00:37:42,676 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 00:37:42,695 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 00:37:42,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 00:37:42,697 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 00:37:42,699 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 00:37:42,699 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 00:37:42,699 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 00:37:42,699 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 00:37:42,700 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 00:37:42,700 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 00:37:42,700 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 00:37:42,700 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 00:37:42,700 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 00:37:42,701 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 00:37:42,701 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 00:37:42,701 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 00:37:42,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 00:37:42,703 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 00:37:42,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 00:37:42,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 00:37:42,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 00:37:42,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 00:37:42,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 00:37:42,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 00:37:42,706 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 00:37:42,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 00:37:42,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 00:37:42,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 00:37:42,707 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 00:37:42,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 00:37:42,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 00:37:42,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 00:37:42,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 00:37:42,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 00:37:42,708 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 00:37:42,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 00:37:42,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 00:37:42,709 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 00:37:42,709 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 00:37:43,023 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 00:37:43,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 00:37:43,039 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 00:37:43,040 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 00:37:43,041 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 00:37:43,041 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/running_example.i [2019-11-24 00:37:43,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba1bb680/f31f27bf342340f59eb19c3377c6e31a/FLAG571b6b92c [2019-11-24 00:37:43,680 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 00:37:43,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-data/running_example.i [2019-11-24 00:37:43,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba1bb680/f31f27bf342340f59eb19c3377c6e31a/FLAG571b6b92c [2019-11-24 00:37:43,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba1bb680/f31f27bf342340f59eb19c3377c6e31a [2019-11-24 00:37:43,966 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 00:37:43,968 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 00:37:43,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 00:37:43,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 00:37:43,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 00:37:43,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:37:43" (1/1) ... [2019-11-24 00:37:43,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45a93051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:43, skipping insertion in model container [2019-11-24 00:37:43,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:37:43" (1/1) ... [2019-11-24 00:37:43,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 00:37:44,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 00:37:44,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 00:37:44,475 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 00:37:44,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 00:37:44,574 INFO L208 MainTranslator]: Completed translation [2019-11-24 00:37:44,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:44 WrapperNode [2019-11-24 00:37:44,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 00:37:44,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 00:37:44,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 00:37:44,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 00:37:44,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:44" (1/1) ... [2019-11-24 00:37:44,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:44" (1/1) ... [2019-11-24 00:37:44,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 00:37:44,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 00:37:44,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 00:37:44,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 00:37:44,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:44" (1/1) ... [2019-11-24 00:37:44,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:44" (1/1) ... [2019-11-24 00:37:44,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:44" (1/1) ... [2019-11-24 00:37:44,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:44" (1/1) ... [2019-11-24 00:37:44,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:44" (1/1) ... [2019-11-24 00:37:44,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:44" (1/1) ... [2019-11-24 00:37:44,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:44" (1/1) ... [2019-11-24 00:37:44,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 00:37:44,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 00:37:44,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 00:37:44,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 00:37:44,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:44" (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 00:37:44,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 00:37:44,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 00:37:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 00:37:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 00:37:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 00:37:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 00:37:44,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 00:37:45,215 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 00:37:45,216 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 00:37:45,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:37:45 BoogieIcfgContainer [2019-11-24 00:37:45,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 00:37:45,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 00:37:45,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 00:37:45,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 00:37:45,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:37:43" (1/3) ... [2019-11-24 00:37:45,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa5ce5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:37:45, skipping insertion in model container [2019-11-24 00:37:45,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:44" (2/3) ... [2019-11-24 00:37:45,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa5ce5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:37:45, skipping insertion in model container [2019-11-24 00:37:45,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:37:45" (3/3) ... [2019-11-24 00:37:45,226 INFO L109 eAbstractionObserver]: Analyzing ICFG running_example.i [2019-11-24 00:37:45,237 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 00:37:45,245 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 00:37:45,257 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 00:37:45,282 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 00:37:45,283 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 00:37:45,283 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 00:37:45,283 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 00:37:45,284 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 00:37:45,284 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 00:37:45,284 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 00:37:45,284 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 00:37:45,296 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-24 00:37:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 00:37:45,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:37:45,304 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 00:37:45,304 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:37:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:37:45,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1470854974, now seen corresponding path program 1 times [2019-11-24 00:37:45,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:37:45,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287546411] [2019-11-24 00:37:45,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:37:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:37:45,458 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 00:37:45,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287546411] [2019-11-24 00:37:45,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 00:37:45,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 00:37:45,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913535173] [2019-11-24 00:37:45,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 00:37:45,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 00:37:45,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 00:37:45,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 00:37:45,485 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-11-24 00:37:45,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 00:37:45,505 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2019-11-24 00:37:45,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 00:37:45,508 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-24 00:37:45,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 00:37:45,520 INFO L225 Difference]: With dead ends: 18 [2019-11-24 00:37:45,520 INFO L226 Difference]: Without dead ends: 11 [2019-11-24 00:37:45,524 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 00:37:45,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-24 00:37:45,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-24 00:37:45,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-24 00:37:45,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2019-11-24 00:37:45,570 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2019-11-24 00:37:45,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 00:37:45,570 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2019-11-24 00:37:45,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 00:37:45,571 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2019-11-24 00:37:45,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 00:37:45,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:37:45,572 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 00:37:45,572 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:37:45,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:37:45,573 INFO L82 PathProgramCache]: Analyzing trace with hash 237323672, now seen corresponding path program 1 times [2019-11-24 00:37:45,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:37:45,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110832184] [2019-11-24 00:37:45,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:37:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:37:45,688 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 00:37:45,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110832184] [2019-11-24 00:37:45,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 00:37:45,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 00:37:45,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845521535] [2019-11-24 00:37:45,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 00:37:45,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 00:37:45,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 00:37:45,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 00:37:45,694 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 5 states. [2019-11-24 00:37:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 00:37:45,819 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2019-11-24 00:37:45,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 00:37:45,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-24 00:37:45,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 00:37:45,821 INFO L225 Difference]: With dead ends: 22 [2019-11-24 00:37:45,821 INFO L226 Difference]: Without dead ends: 20 [2019-11-24 00:37:45,822 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 00:37:45,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-24 00:37:45,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-11-24 00:37:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-24 00:37:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2019-11-24 00:37:45,834 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 8 [2019-11-24 00:37:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 00:37:45,834 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2019-11-24 00:37:45,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 00:37:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2019-11-24 00:37:45,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 00:37:45,838 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:37:45,838 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 00:37:45,838 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:37:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:37:45,839 INFO L82 PathProgramCache]: Analyzing trace with hash 597856672, now seen corresponding path program 1 times [2019-11-24 00:37:45,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:37:45,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720010157] [2019-11-24 00:37:45,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:37:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:37:46,218 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 00:37:46,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720010157] [2019-11-24 00:37:46,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582072326] [2019-11-24 00:37:46,220 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 00:37:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:37:46,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-24 00:37:46,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 00:37:46,382 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-24 00:37:46,392 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2019-11-24 00:37:46,393 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:46,415 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:46,425 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-24 00:37:46,428 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2019-11-24 00:37:46,429 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:46,443 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:46,449 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-24 00:37:46,450 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:46,461 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:46,461 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 00:37:46,462 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:29 [2019-11-24 00:37:46,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:37:46,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:37:46,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:37:46,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:37:46,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:37:46,603 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 71 [2019-11-24 00:37:46,605 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:46,620 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2019-11-24 00:37:46,621 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:46,676 INFO L567 ElimStorePlain]: treesize reduction 99, result has 40.0 percent of original size [2019-11-24 00:37:46,688 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-11-24 00:37:46,689 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:46,708 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:46,708 INFO L464 ElimStorePlain]: Eliminatee v_prenex_10 vanished before elimination [2019-11-24 00:37:46,708 INFO L464 ElimStorePlain]: Eliminatee v_prenex_12 vanished before elimination [2019-11-24 00:37:46,714 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2019-11-24 00:37:46,715 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:46,732 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:46,733 INFO L464 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2019-11-24 00:37:46,740 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-24 00:37:46,740 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:46,756 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:46,765 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-11-24 00:37:46,766 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:46,778 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:46,782 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-24 00:37:46,782 INFO L496 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:46,787 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:46,788 INFO L464 ElimStorePlain]: Eliminatee v_prenex_1 vanished before elimination [2019-11-24 00:37:46,788 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-11-24 00:37:46,788 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-11-24 00:37:46,788 INFO L464 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2019-11-24 00:37:46,789 INFO L464 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2019-11-24 00:37:46,789 INFO L464 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2019-11-24 00:37:46,789 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 15 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 00:37:46,790 INFO L221 ElimStorePlain]: Needed 8 recursive calls to eliminate 18 variables, input treesize:330, output treesize:7 [2019-11-24 00:37:46,792 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 00:37:46,792 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 00:37:46,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:37:46,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:37:46,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:37:46,815 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_27|, v_prenex_14, v_prenex_17, v_prenex_15], 2=[|v_#memory_$Pointer$.base_27|, v_prenex_13, v_prenex_18, v_prenex_16]} [2019-11-24 00:37:46,823 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:47,166 WARN L192 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2019-11-24 00:37:47,167 INFO L567 ElimStorePlain]: treesize reduction 264, result has 40.9 percent of original size [2019-11-24 00:37:47,173 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:47,284 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2019-11-24 00:37:47,285 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:47,289 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:47,375 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:47,380 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:47,437 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:47,442 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 00:37:47,533 INFO L567 ElimStorePlain]: treesize reduction 7, result has 94.3 percent of original size [2019-11-24 00:37:47,538 INFO L496 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 00:37:47,608 INFO L567 ElimStorePlain]: treesize reduction 21, result has 79.2 percent of original size [2019-11-24 00:37:47,614 INFO L496 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 00:37:47,664 INFO L567 ElimStorePlain]: treesize reduction 8, result has 88.1 percent of original size [2019-11-24 00:37:47,675 INFO L496 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 00:37:47,691 INFO L567 ElimStorePlain]: treesize reduction 20, result has 55.6 percent of original size [2019-11-24 00:37:47,693 INFO L496 ElimStorePlain]: Start of recursive call 1: 8 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-24 00:37:47,693 INFO L221 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:463, output treesize:25 [2019-11-24 00:37:47,745 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 00:37:47,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [174673315] [2019-11-24 00:37:47,772 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-24 00:37:47,772 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 00:37:47,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 00:37:47,786 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 00:37:47,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 00:37:48,032 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:37:48,084 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:37:48,094 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:37:48,103 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:37:48,113 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:37:48,122 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:37:48,130 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:37:48,224 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:37:48,269 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:37:48,300 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:37:48,350 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:37:48,409 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 00:37:48,920 WARN L192 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2019-11-24 00:37:49,067 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2019-11-24 00:37:49,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 00:37:49,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 13 [2019-11-24 00:37:49,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570606796] [2019-11-24 00:37:49,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-24 00:37:49,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 00:37:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-24 00:37:49,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-11-24 00:37:49,203 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand 7 states. [2019-11-24 00:37:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 00:37:49,337 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2019-11-24 00:37:49,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 00:37:49,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-11-24 00:37:49,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 00:37:49,338 INFO L225 Difference]: With dead ends: 31 [2019-11-24 00:37:49,339 INFO L226 Difference]: Without dead ends: 22 [2019-11-24 00:37:49,340 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-11-24 00:37:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-24 00:37:49,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-11-24 00:37:49,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-24 00:37:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2019-11-24 00:37:49,347 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 11 [2019-11-24 00:37:49,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 00:37:49,347 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2019-11-24 00:37:49,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-24 00:37:49,347 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2019-11-24 00:37:49,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 00:37:49,348 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:37:49,348 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 00:37:49,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 00:37:49,554 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:37:49,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:37:49,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1081794002, now seen corresponding path program 1 times [2019-11-24 00:37:49,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:37:49,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556642001] [2019-11-24 00:37:49,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:37:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:37:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 00:37:49,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556642001] [2019-11-24 00:37:49,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186886439] [2019-11-24 00:37:49,704 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 00:37:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:37:49,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-24 00:37:49,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 00:37:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 00:37:50,183 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 00:37:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 00:37:50,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1998547058] [2019-11-24 00:37:50,355 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-24 00:37:50,355 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 00:37:50,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 00:37:50,356 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 00:37:50,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 00:38:06,367 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2019-11-24 00:38:06,803 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 214 [2019-11-24 00:38:07,079 WARN L192 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2019-11-24 00:38:40,708 WARN L192 SmtUtils]: Spent 29.42 s on a formula simplification. DAG size of input: 2908 DAG size of output: 492 [2019-11-24 00:38:41,490 WARN L192 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 406 [2019-11-24 00:38:42,565 WARN L192 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 386 [2019-11-24 00:38:49,167 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= ULTIMATE.start_main_~list~0.base ULTIMATE.start_main_~p~0.base) [2019-11-24 00:38:51,191 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select |#length| |ULTIMATE.start_main_#t~malloc2.base|) 8) [2019-11-24 00:38:53,203 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select |#length| |ULTIMATE.start_main_#t~malloc2.base|) 8) [2019-11-24 00:38:55,226 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select |#length| |ULTIMATE.start_main_#t~malloc5.base|) 8) [2019-11-24 00:38:57,260 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select |#length| |ULTIMATE.start_main_#t~malloc5.base|) 8) [2019-11-24 00:38:57,487 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 2378 [2019-11-24 00:39:03,612 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= ULTIMATE.start_main_~list~0.base ULTIMATE.start_main_~p~0.base) [2019-11-24 00:39:05,616 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select (select v_prenex_159 ULTIMATE.start_main_~list~0.base) (+ ULTIMATE.start_main_~list~0.offset 4)) ULTIMATE.start_main_~p~0.base) [2019-11-24 00:39:07,621 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select |#length| |ULTIMATE.start_main_#t~malloc2.base|) 8) [2019-11-24 00:39:09,630 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select |#length| |ULTIMATE.start_main_#t~malloc2.base|) 8) [2019-11-24 00:39:11,635 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select |#length| (select (select v_prenex_159 ULTIMATE.start_main_~list~0.base) (+ ULTIMATE.start_main_~list~0.offset 4))) 8) [2019-11-24 00:39:13,646 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select |#length| (select (select v_prenex_159 ULTIMATE.start_main_~list~0.base) (+ ULTIMATE.start_main_~list~0.offset 4))) 8) [2019-11-24 00:39:15,649 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select |#length| |ULTIMATE.start_main_#t~malloc5.base|) 8) [2019-11-24 00:39:17,657 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select |#length| |ULTIMATE.start_main_#t~malloc5.base|) 8) [2019-11-24 00:39:17,880 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 2373