/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_two_index_08.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:15:54,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:15:54,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:15:54,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:15:54,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:15:54,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:15:54,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:15:54,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:15:54,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:15:54,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:15:54,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:15:54,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:15:54,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:15:54,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:15:54,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:15:54,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:15:54,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:15:54,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:15:54,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:15:54,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:15:54,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:15:54,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:15:54,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:15:54,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:15:54,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:15:55,006 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 23:15:55,020 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:15:55,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:15:55,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:15:55,022 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:15:55,022 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:15:55,022 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:15:55,022 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:15:55,022 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:15:55,023 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:15:55,023 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:15:55,023 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:15:55,023 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:15:55,023 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:15:55,023 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:15:55,024 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:15:55,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:15:55,025 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:15:55,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:15:55,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:15:55,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:15:55,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:15:55,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:15:55,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:15:55,026 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:15:55,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:15:55,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:15:55,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:15:55,027 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:15:55,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:15:55,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:15:55,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:15:55,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:15:55,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:15:55,028 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:15:55,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:15:55,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:15:55,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:15:55,029 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:15:55,301 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:15:55,317 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:15:55,322 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:15:55,324 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:15:55,324 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:15:55,325 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_08.i [2019-11-23 23:15:55,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca5b5a096/494837aef78c44eb80fa627c5935cd0a/FLAG899ea0165 [2019-11-23 23:15:55,881 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:15:55,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_08.i [2019-11-23 23:15:55,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca5b5a096/494837aef78c44eb80fa627c5935cd0a/FLAG899ea0165 [2019-11-23 23:15:56,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca5b5a096/494837aef78c44eb80fa627c5935cd0a [2019-11-23 23:15:56,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:15:56,378 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:15:56,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:15:56,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:15:56,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:15:56,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:15:56" (1/1) ... [2019-11-23 23:15:56,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ba222d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:56, skipping insertion in model container [2019-11-23 23:15:56,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:15:56" (1/1) ... [2019-11-23 23:15:56,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:15:56,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:15:56,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:15:56,580 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:15:56,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:15:56,622 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:15:56,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:56 WrapperNode [2019-11-23 23:15:56,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:15:56,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:15:56,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:15:56,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:15:56,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:56" (1/1) ... [2019-11-23 23:15:56,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:56" (1/1) ... [2019-11-23 23:15:56,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:15:56,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:15:56,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:15:56,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:15:56,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:56" (1/1) ... [2019-11-23 23:15:56,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:56" (1/1) ... [2019-11-23 23:15:56,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:56" (1/1) ... [2019-11-23 23:15:56,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:56" (1/1) ... [2019-11-23 23:15:56,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:56" (1/1) ... [2019-11-23 23:15:56,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:56" (1/1) ... [2019-11-23 23:15:56,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:56" (1/1) ... [2019-11-23 23:15:56,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:15:56,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:15:56,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:15:56,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:15:56,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:56" (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 23:15:56,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:15:56,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:15:56,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:15:56,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:15:56,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:15:56,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:15:57,147 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:15:57,148 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:15:57,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:15:57 BoogieIcfgContainer [2019-11-23 23:15:57,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:15:57,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:15:57,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:15:57,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:15:57,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:15:56" (1/3) ... [2019-11-23 23:15:57,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d6d5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:15:57, skipping insertion in model container [2019-11-23 23:15:57,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:56" (2/3) ... [2019-11-23 23:15:57,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d6d5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:15:57, skipping insertion in model container [2019-11-23 23:15:57,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:15:57" (3/3) ... [2019-11-23 23:15:57,161 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_08.i [2019-11-23 23:15:57,175 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:15:57,181 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:15:57,192 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:15:57,214 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:15:57,214 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:15:57,214 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:15:57,214 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:15:57,214 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:15:57,214 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:15:57,215 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:15:57,215 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:15:57,226 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 23:15:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:15:57,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:57,233 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:15:57,233 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:57,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1774611857, now seen corresponding path program 1 times [2019-11-23 23:15:57,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:57,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885446005] [2019-11-23 23:15:57,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:57,394 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 23:15:57,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885446005] [2019-11-23 23:15:57,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:15:57,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:15:57,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865450122] [2019-11-23 23:15:57,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:15:57,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:15:57,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:15:57,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:15:57,414 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-23 23:15:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:15:57,454 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2019-11-23 23:15:57,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:15:57,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:15:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:15:57,464 INFO L225 Difference]: With dead ends: 17 [2019-11-23 23:15:57,464 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 23:15:57,467 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 23:15:57,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 23:15:57,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 23:15:57,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 23:15:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-11-23 23:15:57,497 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2019-11-23 23:15:57,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:15:57,498 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-23 23:15:57,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:15:57,498 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-11-23 23:15:57,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:15:57,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:57,499 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:15:57,500 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:57,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:57,500 INFO L82 PathProgramCache]: Analyzing trace with hash -610925648, now seen corresponding path program 1 times [2019-11-23 23:15:57,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:57,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348204793] [2019-11-23 23:15:57,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:57,565 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 23:15:57,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348204793] [2019-11-23 23:15:57,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822920775] [2019-11-23 23:15:57,567 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 23:15:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:57,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:15:57,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:15:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:15:57,636 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:15:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:15:57,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:15:57,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2019-11-23 23:15:57,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129246251] [2019-11-23 23:15:57,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:15:57,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:15:57,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:15:57,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:15:57,658 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2019-11-23 23:15:57,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:15:57,710 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 23:15:57,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:15:57,711 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 23:15:57,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:15:57,712 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:15:57,712 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 23:15:57,713 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:15:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 23:15:57,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2019-11-23 23:15:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:15:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 23:15:57,718 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2019-11-23 23:15:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:15:57,718 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 23:15:57,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:15:57,719 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 23:15:57,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:15:57,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:57,720 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 23:15:57,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:15:57,925 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:57,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:57,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1417050161, now seen corresponding path program 1 times [2019-11-23 23:15:57,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:57,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860374430] [2019-11-23 23:15:57,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:58,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860374430] [2019-11-23 23:15:58,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980972728] [2019-11-23 23:15:58,007 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 [2019-11-23 23:15:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:58,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:15:58,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:15:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:58,062 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:15:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:58,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [348730504] [2019-11-23 23:15:58,179 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:15:58,179 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:15:58,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:15:58,200 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:15:58,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:16:00,169 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 134 [2019-11-23 23:16:08,788 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 188 [2019-11-23 23:16:10,059 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2019-11-23 23:16:10,228 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 193 [2019-11-23 23:16:17,803 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 213 [2019-11-23 23:16:29,006 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 257 [2019-11-23 23:16:29,122 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 258 [2019-11-23 23:16:33,276 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 276 [2019-11-23 23:16:35,511 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 279 [2019-11-23 23:16:37,757 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2019-11-23 23:16:39,926 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2019-11-23 23:16:40,047 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 290 [2019-11-23 23:16:42,126 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 296 [2019-11-23 23:16:42,341 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 293 [2019-11-23 23:16:44,770 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 295 [2019-11-23 23:16:46,703 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 298 [2019-11-23 23:16:46,813 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 299 [2019-11-23 23:16:49,039 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2019-11-23 23:16:49,152 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 303 [2019-11-23 23:16:51,396 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 306 [2019-11-23 23:16:51,522 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 305 [2019-11-23 23:16:51,664 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-23 23:16:51,772 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 308 [2019-11-23 23:16:54,110 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2019-11-23 23:16:54,251 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 312 [2019-11-23 23:16:56,472 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 316 [2019-11-23 23:16:56,606 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 316 [2019-11-23 23:16:59,016 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2019-11-23 23:16:59,170 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 318 [2019-11-23 23:16:59,313 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2019-11-23 23:16:59,439 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 320 [2019-11-23 23:17:01,876 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2019-11-23 23:17:02,038 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 323 [2019-11-23 23:17:02,169 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-23 23:17:02,293 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 326 [2019-11-23 23:17:04,602 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 334 [2019-11-23 23:17:04,739 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 328 [2019-11-23 23:17:04,867 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-23 23:17:04,978 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 330 [2019-11-23 23:17:07,530 WARN L192 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 338 [2019-11-23 23:17:07,674 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 333 [2019-11-23 23:17:07,837 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2019-11-23 23:17:07,970 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 335 [2019-11-23 23:17:08,099 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2019-11-23 23:17:08,212 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 339 [2019-11-23 23:17:10,770 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2019-11-23 23:17:10,911 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 343 [2019-11-23 23:17:13,501 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 347 [2019-11-23 23:17:13,649 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 347 [2019-11-23 23:17:16,859 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2019-11-23 23:17:17,004 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 352 [2019-11-23 23:17:20,240 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2019-11-23 23:17:20,399 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 355 [2019-11-23 23:17:23,765 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2019-11-23 23:17:23,919 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 357 [2019-11-23 23:17:26,579 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 361 [2019-11-23 23:17:26,732 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 358 [2019-11-23 23:17:26,879 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2019-11-23 23:17:27,005 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 360