/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-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:24:23,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:24:23,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:24:23,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:24:23,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:24:23,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:24:23,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:24:23,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:24:23,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:24:23,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:24:23,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:24:23,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:24:23,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:24:23,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:24:23,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:24:23,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:24:23,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:24:23,300 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 04:24:23,321 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:24:23,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:24:23,322 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:24:23,322 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:24:23,323 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:24:23,323 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:24:23,323 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:24:23,323 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:24:23,323 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:24:23,324 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:24:23,324 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:24:23,324 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:24:23,324 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:24:23,325 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:24:23,325 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:24:23,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:24:23,326 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:24:23,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:24:23,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:24:23,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:24:23,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:24:23,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:24:23,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:24:23,327 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:24:23,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:24:23,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:24:23,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:24:23,328 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:24:23,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:24:23,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:24:23,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:24:23,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:24:23,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:24:23,329 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:24:23,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:24:23,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:24:23,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:24:23,330 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:24:23,612 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:24:23,626 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:24:23,630 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:24:23,632 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:24:23,632 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:24:23,633 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2019-11-24 04:24:23,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da710c3da/6ba5b0709b504a73b4b5f2a37d0dff03/FLAGf942d63fb [2019-11-24 04:24:24,090 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:24:24,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2019-11-24 04:24:24,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da710c3da/6ba5b0709b504a73b4b5f2a37d0dff03/FLAGf942d63fb [2019-11-24 04:24:24,471 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da710c3da/6ba5b0709b504a73b4b5f2a37d0dff03 [2019-11-24 04:24:24,483 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:24:24,484 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:24:24,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:24:24,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:24:24,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:24:24,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:24:24" (1/1) ... [2019-11-24 04:24:24,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d72817c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:24, skipping insertion in model container [2019-11-24 04:24:24,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:24:24" (1/1) ... [2019-11-24 04:24:24,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:24:24,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:24:24,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:24:24,782 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:24:24,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:24:24,818 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:24:24,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:24 WrapperNode [2019-11-24 04:24:24,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:24:24,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:24:24,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:24:24,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:24:24,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:24" (1/1) ... [2019-11-24 04:24:24,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:24" (1/1) ... [2019-11-24 04:24:24,935 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:24:24,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:24:24,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:24:24,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:24:24,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:24" (1/1) ... [2019-11-24 04:24:24,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:24" (1/1) ... [2019-11-24 04:24:24,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:24" (1/1) ... [2019-11-24 04:24:24,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:24" (1/1) ... [2019-11-24 04:24:24,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:24" (1/1) ... [2019-11-24 04:24:24,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:24" (1/1) ... [2019-11-24 04:24:24,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:24" (1/1) ... [2019-11-24 04:24:24,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:24:24,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:24:24,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:24:24,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:24:24,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:24" (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 04:24:25,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:24:25,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:24:25,252 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:24:25,253 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 04:24:25,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:24:25 BoogieIcfgContainer [2019-11-24 04:24:25,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:24:25,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:24:25,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:24:25,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:24:25,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:24:24" (1/3) ... [2019-11-24 04:24:25,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7599fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:24:25, skipping insertion in model container [2019-11-24 04:24:25,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:24" (2/3) ... [2019-11-24 04:24:25,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7599fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:24:25, skipping insertion in model container [2019-11-24 04:24:25,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:24:25" (3/3) ... [2019-11-24 04:24:25,262 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2019-11-24 04:24:25,272 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:24:25,279 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:24:25,291 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:24:25,316 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:24:25,317 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:24:25,320 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:24:25,320 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:24:25,320 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:24:25,320 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:24:25,320 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:24:25,321 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:24:25,342 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-24 04:24:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:24:25,350 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:24:25,351 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:24:25,351 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:24:25,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:24:25,360 INFO L82 PathProgramCache]: Analyzing trace with hash 29775561, now seen corresponding path program 1 times [2019-11-24 04:24:25,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:24:25,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249525961] [2019-11-24 04:24:25,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:24:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:24:25,656 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 04:24:25,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249525961] [2019-11-24 04:24:25,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:24:25,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:24:25,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900278534] [2019-11-24 04:24:25,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:24:25,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:24:25,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:24:25,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:24:25,686 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 5 states. [2019-11-24 04:24:25,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:24:25,824 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-24 04:24:25,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:24:25,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-11-24 04:24:25,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:24:25,836 INFO L225 Difference]: With dead ends: 21 [2019-11-24 04:24:25,836 INFO L226 Difference]: Without dead ends: 7 [2019-11-24 04:24:25,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:24:25,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-24 04:24:25,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-24 04:24:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-24 04:24:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-24 04:24:25,878 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-11-24 04:24:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:24:25,879 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-24 04:24:25,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:24:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-24 04:24:25,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:24:25,880 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:24:25,880 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:24:25,883 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:24:25,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:24:25,883 INFO L82 PathProgramCache]: Analyzing trace with hash 922999114, now seen corresponding path program 1 times [2019-11-24 04:24:25,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:24:25,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656087380] [2019-11-24 04:24:25,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:24:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:24:26,089 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 04:24:26,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656087380] [2019-11-24 04:24:26,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069329699] [2019-11-24 04:24:26,092 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 04:24:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:24:26,133 WARN L253 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-24 04:24:26,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:24:26,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:24:26,249 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 04:24:26,249 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:24:26,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:24:26,453 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 21 [2019-11-24 04:24:26,455 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 04:24:26,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444377931] [2019-11-24 04:24:26,480 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-11-24 04:24:26,480 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:24:26,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:24:26,494 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:24:26,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:24:27,444 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 255 [2019-11-24 04:24:27,914 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 249 [2019-11-24 04:24:28,356 WARN L192 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 452 [2019-11-24 04:24:29,817 WARN L192 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 440 [2019-11-24 04:24:30,946 WARN L192 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 926 DAG size of output: 902 [2019-11-24 04:24:36,577 WARN L192 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 896 DAG size of output: 895 [2019-11-24 04:24:38,879 WARN L192 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 1914 DAG size of output: 1896 [2019-11-24 04:24:47,130 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 18260 conjuctions. This might take some time... [2019-11-24 04:25:24,424 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7568 conjuctions. This might take some time... [2019-11-24 04:25:28,913 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 8002 conjuctions. This might take some time... [2019-11-24 04:25:39,174 WARN L192 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 1877 DAG size of output: 1874 [2019-11-24 04:25:47,001 WARN L192 SmtUtils]: Spent 7.58 s on a formula simplification. DAG size of input: 3936 DAG size of output: 3900 [2019-11-24 04:25:50,698 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7652 conjuctions. This might take some time... [2019-11-24 04:26:01,588 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 10070 conjuctions. This might take some time...