/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/array-industry-pattern/array_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:17:22,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:17:22,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:17:22,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:17:22,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:17:22,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:17:22,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:17:22,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:17:22,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:17:22,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:17:22,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:17:22,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:17:22,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:17:22,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:17:22,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:17:22,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:17:22,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:17:22,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:17:22,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:17:22,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:17:22,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:17:22,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:17:22,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:17:22,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:17:22,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:17:22,067 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 [2019-11-23 23:17:22,083 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:17:22,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:17:22,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:17:22,084 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:17:22,084 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:17:22,084 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:17:22,085 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:17:22,085 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:17:22,085 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:17:22,085 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:17:22,085 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:17:22,085 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:17:22,086 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:17:22,086 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:17:22,086 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:17:22,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:17:22,087 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:17:22,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:17:22,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:17:22,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:17:22,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:17:22,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:17:22,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:17:22,088 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:17:22,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:17:22,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:17:22,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:17:22,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:17:22,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:17:22,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:17:22,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:17:22,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:17:22,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:17:22,090 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:17:22,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:17:22,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:17:22,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:17:22,091 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:17:22,407 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:17:22,425 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:17:22,429 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:17:22,430 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:17:22,431 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:17:22,431 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2019-11-23 23:17:22,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef144eea6/4d7bd239591f43a7a9e448aeed009129/FLAGc07f7585b [2019-11-23 23:17:22,954 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:17:22,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2019-11-23 23:17:22,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef144eea6/4d7bd239591f43a7a9e448aeed009129/FLAGc07f7585b [2019-11-23 23:17:23,320 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef144eea6/4d7bd239591f43a7a9e448aeed009129 [2019-11-23 23:17:23,330 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:17:23,332 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:17:23,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:17:23,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:17:23,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:17:23,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:17:23" (1/1) ... [2019-11-23 23:17:23,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e9683c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:23, skipping insertion in model container [2019-11-23 23:17:23,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:17:23" (1/1) ... [2019-11-23 23:17:23,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:17:23,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:17:23,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:17:23,554 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:17:23,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:17:23,591 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:17:23,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:23 WrapperNode [2019-11-23 23:17:23,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:17:23,592 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:17:23,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:17:23,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:17:23,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:23" (1/1) ... [2019-11-23 23:17:23,606 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:23" (1/1) ... [2019-11-23 23:17:23,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:17:23,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:17:23,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:17:23,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:17:23,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:23" (1/1) ... [2019-11-23 23:17:23,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:23" (1/1) ... [2019-11-23 23:17:23,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:23" (1/1) ... [2019-11-23 23:17:23,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:23" (1/1) ... [2019-11-23 23:17:23,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:23" (1/1) ... [2019-11-23 23:17:23,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:23" (1/1) ... [2019-11-23 23:17:23,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:23" (1/1) ... [2019-11-23 23:17:23,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:17:23,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:17:23,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:17:23,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:17:23,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:23" (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 [2019-11-23 23:17:23,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:17:23,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:17:23,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:17:23,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:17:23,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:17:23,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:17:24,132 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:17:24,133 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 23:17:24,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:17:24 BoogieIcfgContainer [2019-11-23 23:17:24,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:17:24,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:17:24,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:17:24,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:17:24,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:17:23" (1/3) ... [2019-11-23 23:17:24,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e02ddd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:17:24, skipping insertion in model container [2019-11-23 23:17:24,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:23" (2/3) ... [2019-11-23 23:17:24,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e02ddd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:17:24, skipping insertion in model container [2019-11-23 23:17:24,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:17:24" (3/3) ... [2019-11-23 23:17:24,146 INFO L109 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2019-11-23 23:17:24,161 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:17:24,170 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:17:24,181 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:17:24,206 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:17:24,206 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:17:24,206 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:17:24,207 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:17:24,207 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:17:24,207 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:17:24,207 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:17:24,207 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:17:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-11-23 23:17:24,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-23 23:17:24,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:17:24,231 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-23 23:17:24,231 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:17:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:17:24,238 INFO L82 PathProgramCache]: Analyzing trace with hash 75663279, now seen corresponding path program 1 times [2019-11-23 23:17:24,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:17:24,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783412259] [2019-11-23 23:17:24,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:17:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:17:24,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783412259] [2019-11-23 23:17:24,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:17:24,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:17:24,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886984971] [2019-11-23 23:17:24,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:17:24,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:17:24,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:17:24,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:17:24,405 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-11-23 23:17:24,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:17:24,450 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2019-11-23 23:17:24,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:17:24,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-23 23:17:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:17:24,463 INFO L225 Difference]: With dead ends: 20 [2019-11-23 23:17:24,463 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 23:17:24,466 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:17:24,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 23:17:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2019-11-23 23:17:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-23 23:17:24,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-23 23:17:24,497 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-11-23 23:17:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:17:24,497 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-23 23:17:24,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:17:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-23 23:17:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:17:24,498 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:17:24,499 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:17:24,499 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:17:24,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:17:24,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1956677567, now seen corresponding path program 1 times [2019-11-23 23:17:24,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:17:24,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192690192] [2019-11-23 23:17:24,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:17:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:17:24,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192690192] [2019-11-23 23:17:24,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36499811] [2019-11-23 23:17:24,576 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 [2019-11-23 23:17:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:24,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:17:24,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:17:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:17:24,667 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:17:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:17:24,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154440386] [2019-11-23 23:17:24,716 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-11-23 23:17:24,717 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:17:24,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:17:24,732 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:17:24,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:17:55,763 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 256 [2019-11-23 23:18:33,232 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 333 [2019-11-23 23:18:33,361 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 327 [2019-11-23 23:18:45,589 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 350 [2019-11-23 23:18:48,218 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 351 [2019-11-23 23:18:50,678 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 353 [2019-11-23 23:18:53,481 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 363 [2019-11-23 23:18:53,592 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 360 [2019-11-23 23:18:56,097 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 366 [2019-11-23 23:18:56,227 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 364