/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/nla-digbench/sqrt1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:30:52,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:30:52,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:30:52,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:30:52,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:30:52,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:30:52,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:30:52,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:30:52,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:30:52,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:30:52,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:30:52,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:30:52,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:30:52,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:30:52,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:30:52,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:30:52,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:30:52,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:30:52,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:30:52,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:30:52,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:30:52,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:30:52,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:30:52,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:30:52,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:30:52,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:30:52,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:30:52,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:30:52,088 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 04:30:52,102 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:30:52,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:30:52,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:30:52,104 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:30:52,104 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:30:52,104 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:30:52,104 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:30:52,104 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:30:52,105 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:30:52,105 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:30:52,105 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:30:52,105 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:30:52,105 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:30:52,105 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:30:52,106 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:30:52,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:30:52,106 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:30:52,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:30:52,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:30:52,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:30:52,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:30:52,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:30:52,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:30:52,108 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:30:52,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:30:52,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:30:52,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:30:52,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:30:52,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:30:52,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:30:52,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:30:52,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:30:52,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:30:52,110 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:30:52,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:30:52,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:30:52,110 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:30:52,110 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:30:52,382 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:30:52,402 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:30:52,405 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:30:52,406 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:30:52,407 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:30:52,407 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1.c [2019-11-24 04:30:52,475 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/069c89ecb/4a6fe644237c498a810683b80b02744f/FLAG4020495f2 [2019-11-24 04:30:52,920 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:30:52,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1.c [2019-11-24 04:30:52,927 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/069c89ecb/4a6fe644237c498a810683b80b02744f/FLAG4020495f2 [2019-11-24 04:30:53,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/069c89ecb/4a6fe644237c498a810683b80b02744f [2019-11-24 04:30:53,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:30:53,324 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:30:53,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:30:53,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:30:53,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:30:53,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:30:53" (1/1) ... [2019-11-24 04:30:53,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35abdc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:53, skipping insertion in model container [2019-11-24 04:30:53,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:30:53" (1/1) ... [2019-11-24 04:30:53,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:30:53,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:30:53,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:30:53,535 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:30:53,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:30:53,566 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:30:53,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:53 WrapperNode [2019-11-24 04:30:53,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:30:53,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:30:53,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:30:53,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:30:53,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:53" (1/1) ... [2019-11-24 04:30:53,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:53" (1/1) ... [2019-11-24 04:30:53,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:30:53,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:30:53,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:30:53,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:30:53,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:53" (1/1) ... [2019-11-24 04:30:53,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:53" (1/1) ... [2019-11-24 04:30:53,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:53" (1/1) ... [2019-11-24 04:30:53,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:53" (1/1) ... [2019-11-24 04:30:53,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:53" (1/1) ... [2019-11-24 04:30:53,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:53" (1/1) ... [2019-11-24 04:30:53,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:53" (1/1) ... [2019-11-24 04:30:53,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:30:53,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:30:53,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:30:53,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:30:53,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:30:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:30:53,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:30:54,016 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:30:54,016 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-24 04:30:54,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:30:54 BoogieIcfgContainer [2019-11-24 04:30:54,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:30:54,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:30:54,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:30:54,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:30:54,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:30:53" (1/3) ... [2019-11-24 04:30:54,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa208a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:30:54, skipping insertion in model container [2019-11-24 04:30:54,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:30:53" (2/3) ... [2019-11-24 04:30:54,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa208a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:30:54, skipping insertion in model container [2019-11-24 04:30:54,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:30:54" (3/3) ... [2019-11-24 04:30:54,041 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt1.c [2019-11-24 04:30:54,054 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:30:54,061 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-24 04:30:54,071 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-24 04:30:54,094 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:30:54,095 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:30:54,095 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:30:54,095 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:30:54,095 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:30:54,095 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:30:54,095 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:30:54,095 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:30:54,109 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-24 04:30:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 04:30:54,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:30:54,114 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 04:30:54,114 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:30:54,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:30:54,119 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-24 04:30:54,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:30:54,127 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432622239] [2019-11-24 04:30:54,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:30:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:30:54,337 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 04:30:54,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432622239] [2019-11-24 04:30:54,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:30:54,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:30:54,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035432353] [2019-11-24 04:30:54,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:30:54,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:30:54,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:30:54,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:30:54,360 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2019-11-24 04:30:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:30:54,483 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2019-11-24 04:30:54,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:30:54,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-24 04:30:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:30:54,495 INFO L225 Difference]: With dead ends: 52 [2019-11-24 04:30:54,495 INFO L226 Difference]: Without dead ends: 23 [2019-11-24 04:30:54,499 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 04:30:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-24 04:30:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-24 04:30:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-24 04:30:54,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-11-24 04:30:54,542 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 4 [2019-11-24 04:30:54,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:30:54,542 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-11-24 04:30:54,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:30:54,543 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-11-24 04:30:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:30:54,544 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:30:54,544 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:30:54,545 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:30:54,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:30:54,546 INFO L82 PathProgramCache]: Analyzing trace with hash 925925231, now seen corresponding path program 1 times [2019-11-24 04:30:54,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:30:54,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106578596] [2019-11-24 04:30:54,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:30:54,571 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:30:54,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274686848] [2019-11-24 04:30:54,572 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 04:30:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:30:54,624 WARN L253 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-24 04:30:54,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:30:54,729 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 04:30:54,729 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:30:54,795 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:54,820 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 04:30:54,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106578596] [2019-11-24 04:30:54,821 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:30:54,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274686848] [2019-11-24 04:30:54,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:30:54,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-24 04:30:54,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332122452] [2019-11-24 04:30:54,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-24 04:30:54,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:30:54,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-24 04:30:54,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-24 04:30:54,826 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 10 states. [2019-11-24 04:30:55,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:30:55,064 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-11-24 04:30:55,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-24 04:30:55,065 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-11-24 04:30:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:30:55,066 INFO L225 Difference]: With dead ends: 41 [2019-11-24 04:30:55,066 INFO L226 Difference]: Without dead ends: 27 [2019-11-24 04:30:55,069 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2019-11-24 04:30:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-24 04:30:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-11-24 04:30:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-24 04:30:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-11-24 04:30:55,086 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 6 [2019-11-24 04:30:55,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:30:55,087 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-11-24 04:30:55,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-24 04:30:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-11-24 04:30:55,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:30:55,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:30:55,089 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-24 04:30:55,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:30:55,293 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:30:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:30:55,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1240091547, now seen corresponding path program 1 times [2019-11-24 04:30:55,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:30:55,296 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868581317] [2019-11-24 04:30:55,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:30:55,310 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:30:55,310 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023594118] [2019-11-24 04:30:55,311 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 04:30:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:30:55,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-24 04:30:55,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:30:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:30:55,448 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:30:55,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:30:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 04:30:55,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868581317] [2019-11-24 04:30:55,547 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:30:55,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023594118] [2019-11-24 04:30:55,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1739841318] [2019-11-24 04:30:55,572 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-24 04:30:55,573 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:30:55,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:30:55,586 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:30:55,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:30:56,638 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 291 [2019-11-24 04:30:56,823 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 285 [2019-11-24 04:30:57,062 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 358 [2019-11-24 04:30:57,352 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 348 [2019-11-24 04:30:57,631 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2019-11-24 04:30:57,881 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 355 [2019-11-24 04:30:58,150 WARN L192 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 446 [2019-11-24 04:30:58,502 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 439 [2019-11-24 04:30:58,879 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 445 [2019-11-24 04:30:59,217 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 446 [2019-11-24 04:30:59,683 WARN L192 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 556 [2019-11-24 04:31:00,175 WARN L192 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 548 [2019-11-24 04:31:00,689 WARN L192 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 680 [2019-11-24 04:31:01,311 WARN L192 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 670 DAG size of output: 669 [2019-11-24 04:31:02,125 WARN L192 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 827 DAG size of output: 824 [2019-11-24 04:31:03,066 WARN L192 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 818 DAG size of output: 817 [2019-11-24 04:31:04,327 WARN L192 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 1007 DAG size of output: 1003 [2019-11-24 04:31:05,811 WARN L192 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 992 DAG size of output: 991 [2019-11-24 04:31:07,953 WARN L192 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 1223 DAG size of output: 1213 [2019-11-24 04:31:10,272 WARN L192 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 1204 DAG size of output: 1203 [2019-11-24 04:31:12,815 WARN L192 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 1211 [2019-11-24 04:31:15,379 WARN L192 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 1212 DAG size of output: 1211 [2019-11-24 04:31:17,947 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 1218 [2019-11-24 04:31:20,444 WARN L192 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 1219 DAG size of output: 1218 [2019-11-24 04:31:23,313 WARN L192 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 1225 [2019-11-24 04:31:25,319 WARN L192 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 1226 DAG size of output: 1225 [2019-11-24 04:31:27,718 WARN L192 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 1232 [2019-11-24 04:31:29,820 WARN L192 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 1233 DAG size of output: 1232 [2019-11-24 04:31:32,169 WARN L192 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 1238 [2019-11-24 04:31:34,163 WARN L192 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 1239 DAG size of output: 1238 [2019-11-24 04:31:36,575 WARN L192 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 1245 [2019-11-24 04:31:38,698 WARN L192 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 1246 DAG size of output: 1224 [2019-11-24 04:31:40,920 WARN L192 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 1214 DAG size of output: 1213 [2019-11-24 04:31:42,927 WARN L192 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 1213 DAG size of output: 1213 [2019-11-24 04:31:46,386 WARN L192 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 1502 DAG size of output: 1499 [2019-11-24 04:31:49,805 WARN L192 SmtUtils]: Spent 3.14 s on a formula simplification. DAG size of input: 1489 DAG size of output: 1489 [2019-11-24 04:31:55,416 WARN L192 SmtUtils]: Spent 5.32 s on a formula simplification. DAG size of input: 1856 DAG size of output: 1846 [2019-11-24 04:32:01,097 WARN L192 SmtUtils]: Spent 5.25 s on a formula simplification. DAG size of input: 1835 DAG size of output: 1832 [2019-11-24 04:32:09,695 WARN L192 SmtUtils]: Spent 8.24 s on a formula simplification. DAG size of input: 2255 DAG size of output: 2245 [2019-11-24 04:32:18,807 WARN L192 SmtUtils]: Spent 8.48 s on a formula simplification. DAG size of input: 2226 DAG size of output: 2225 [2019-11-24 04:32:33,286 WARN L192 SmtUtils]: Spent 13.96 s on a formula simplification. DAG size of input: 2721 DAG size of output: 2707