/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-examples/standard_init8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:10:54,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:10:54,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:10:54,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:10:54,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:10:54,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:10:54,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:10:54,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:10:54,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:10:55,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:10:55,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:10:55,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:10:55,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:10:55,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:10:55,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:10:55,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:10:55,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:10:55,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:10:55,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:10:55,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:10:55,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:10:55,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:10:55,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:10:55,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:10:55,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:10:55,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:10:55,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:10:55,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:10:55,044 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 23:10:55,068 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:10:55,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:10:55,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:10:55,070 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:10:55,070 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:10:55,070 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:10:55,070 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:10:55,071 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:10:55,071 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:10:55,071 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:10:55,072 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:10:55,072 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:10:55,073 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:10:55,073 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:10:55,073 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:10:55,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:10:55,074 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:10:55,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:10:55,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:10:55,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:10:55,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:10:55,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:10:55,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:10:55,076 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:10:55,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:10:55,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:10:55,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:10:55,077 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:10:55,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:10:55,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:10:55,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:10:55,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:10:55,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:10:55,079 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:10:55,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:10:55,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:10:55,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:10:55,080 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:10:55,331 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:10:55,351 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:10:55,354 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:10:55,356 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:10:55,356 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:10:55,357 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2019-11-23 23:10:55,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b052a52e/2e782d2ee00646669a0bc02216fc31c6/FLAGb0f5da68d [2019-11-23 23:10:55,876 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:10:55,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2019-11-23 23:10:55,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b052a52e/2e782d2ee00646669a0bc02216fc31c6/FLAGb0f5da68d [2019-11-23 23:10:56,246 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b052a52e/2e782d2ee00646669a0bc02216fc31c6 [2019-11-23 23:10:56,254 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:10:56,256 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:10:56,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:10:56,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:10:56,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:10:56,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:10:56" (1/1) ... [2019-11-23 23:10:56,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f03ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:10:56, skipping insertion in model container [2019-11-23 23:10:56,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:10:56" (1/1) ... [2019-11-23 23:10:56,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:10:56,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:10:56,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:10:56,480 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:10:56,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:10:56,633 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:10:56,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:10:56 WrapperNode [2019-11-23 23:10:56,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:10:56,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:10:56,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:10:56,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:10:56,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:10:56" (1/1) ... [2019-11-23 23:10:56,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:10:56" (1/1) ... [2019-11-23 23:10:56,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:10:56,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:10:56,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:10:56,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:10:56,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:10:56" (1/1) ... [2019-11-23 23:10:56,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:10:56" (1/1) ... [2019-11-23 23:10:56,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:10:56" (1/1) ... [2019-11-23 23:10:56,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:10:56" (1/1) ... [2019-11-23 23:10:56,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:10:56" (1/1) ... [2019-11-23 23:10:56,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:10:56" (1/1) ... [2019-11-23 23:10:56,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:10:56" (1/1) ... [2019-11-23 23:10:56,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:10:56,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:10:56,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:10:56,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:10:56,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:10:56" (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 23:10:56,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:10:56,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:10:56,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:10:56,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:10:56,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:10:56,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:10:57,189 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:10:57,190 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 23:10:57,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:10:57 BoogieIcfgContainer [2019-11-23 23:10:57,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:10:57,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:10:57,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:10:57,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:10:57,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:10:56" (1/3) ... [2019-11-23 23:10:57,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79428d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:10:57, skipping insertion in model container [2019-11-23 23:10:57,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:10:56" (2/3) ... [2019-11-23 23:10:57,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79428d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:10:57, skipping insertion in model container [2019-11-23 23:10:57,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:10:57" (3/3) ... [2019-11-23 23:10:57,198 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-1.i [2019-11-23 23:10:57,207 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:10:57,214 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:10:57,225 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:10:57,243 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:10:57,244 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:10:57,244 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:10:57,244 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:10:57,244 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:10:57,244 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:10:57,244 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:10:57,244 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:10:57,256 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 23:10:57,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 23:10:57,261 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:10:57,262 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:10:57,262 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:10:57,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:10:57,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1712107607, now seen corresponding path program 1 times [2019-11-23 23:10:57,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:10:57,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072856027] [2019-11-23 23:10:57,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:10:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:10:57,418 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 23:10:57,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072856027] [2019-11-23 23:10:57,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:10:57,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:10:57,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011073767] [2019-11-23 23:10:57,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:10:57,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:10:57,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:10:57,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:10:57,440 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-11-23 23:10:57,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:10:57,552 INFO L93 Difference]: Finished difference Result 36 states and 61 transitions. [2019-11-23 23:10:57,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:10:57,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-23 23:10:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:10:57,565 INFO L225 Difference]: With dead ends: 36 [2019-11-23 23:10:57,566 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 23:10:57,569 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 23:10:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 23:10:57,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 23:10:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 23:10:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2019-11-23 23:10:57,610 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 12 [2019-11-23 23:10:57,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:10:57,611 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2019-11-23 23:10:57,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:10:57,611 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2019-11-23 23:10:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 23:10:57,612 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:10:57,613 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:10:57,613 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:10:57,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:10:57,614 INFO L82 PathProgramCache]: Analyzing trace with hash -271410445, now seen corresponding path program 1 times [2019-11-23 23:10:57,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:10:57,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951428072] [2019-11-23 23:10:57,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:10:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:10:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 23:10:57,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951428072] [2019-11-23 23:10:57,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920116240] [2019-11-23 23:10:57,668 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 23:10:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:10:57,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:10:57,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:10:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 23:10:57,758 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:10:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 23:10:57,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [45989258] [2019-11-23 23:10:57,821 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-23 23:10:57,822 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:10:57,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:10:57,857 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:10:57,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:11:38,846 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 281 [2019-11-23 23:11:38,964 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 278 [2019-11-23 23:11:53,924 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 314 [2019-11-23 23:12:01,415 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2019-11-23 23:12:01,671 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 332 [2019-11-23 23:12:06,461 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 337 [2019-11-23 23:12:06,674 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 339 [2019-11-23 23:12:14,522 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 351 [2019-11-23 23:12:19,713 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 365 [2019-11-23 23:12:22,281 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 369 [2019-11-23 23:12:22,418 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 364 [2019-11-23 23:12:25,083 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 365 [2019-11-23 23:12:25,192 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 365