/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/sanfoundry_27_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:01:20,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:01:20,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:01:20,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:01:20,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:01:20,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:01:20,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:01:20,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:01:20,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:01:20,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:01:20,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:01:20,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:01:20,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:01:20,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:01:20,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:01:20,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:01:20,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:01:20,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:01:20,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:01:20,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:01:20,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:01:20,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:01:20,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:01:20,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:01:20,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:01:20,809 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 23:01:20,832 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:01:20,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:01:20,834 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:01:20,834 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:01:20,835 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:01:20,835 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:01:20,835 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:01:20,835 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:01:20,835 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:01:20,836 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:01:20,837 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:01:20,837 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:01:20,837 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:01:20,838 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:01:20,838 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:01:20,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:01:20,839 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:01:20,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:01:20,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:01:20,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:01:20,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:01:20,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:01:20,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:01:20,841 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:01:20,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:01:20,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:01:20,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:01:20,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:01:20,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:01:20,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:01:20,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:01:20,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:01:20,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:01:20,844 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:01:20,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:01:20,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:01:20,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:01:20,846 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:01:21,100 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:01:21,117 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:01:21,124 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:01:21,126 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:01:21,126 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:01:21,127 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2019-11-23 23:01:21,196 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ea0acb6/c4e0eba2f0994b48af56c48262ccf566/FLAG87365b516 [2019-11-23 23:01:21,655 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:01:21,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2019-11-23 23:01:21,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ea0acb6/c4e0eba2f0994b48af56c48262ccf566/FLAG87365b516 [2019-11-23 23:01:22,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ea0acb6/c4e0eba2f0994b48af56c48262ccf566 [2019-11-23 23:01:22,036 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:01:22,037 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:01:22,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:01:22,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:01:22,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:01:22,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb7bbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22, skipping insertion in model container [2019-11-23 23:01:22,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:01:22,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:01:22,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:01:22,320 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:01:22,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:01:22,371 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:01:22,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22 WrapperNode [2019-11-23 23:01:22,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:01:22,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:01:22,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:01:22,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:01:22,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:01:22,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:01:22,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:01:22,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:01:22,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (1/1) ... [2019-11-23 23:01:22,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:01:22,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:01:22,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:01:22,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:01:22,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (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 23:01:22,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:01:22,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:01:22,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:01:22,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:01:22,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:01:22,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:01:22,961 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:01:22,961 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:01:22,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:01:22 BoogieIcfgContainer [2019-11-23 23:01:22,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:01:22,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:01:22,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:01:22,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:01:22,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:01:22" (1/3) ... [2019-11-23 23:01:22,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5bbafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:01:22, skipping insertion in model container [2019-11-23 23:01:22,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:22" (2/3) ... [2019-11-23 23:01:22,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5bbafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:01:22, skipping insertion in model container [2019-11-23 23:01:22,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:01:22" (3/3) ... [2019-11-23 23:01:22,971 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_27_ground.i [2019-11-23 23:01:22,978 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:01:22,984 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:01:22,993 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:01:23,017 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:01:23,017 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:01:23,017 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:01:23,017 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:01:23,018 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:01:23,018 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:01:23,018 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:01:23,018 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:01:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 23:01:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:01:23,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:23,039 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:01:23,039 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:23,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1537856822, now seen corresponding path program 1 times [2019-11-23 23:01:23,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:23,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663340298] [2019-11-23 23:01:23,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:23,207 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 23:01:23,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663340298] [2019-11-23 23:01:23,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:01:23,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:01:23,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31059149] [2019-11-23 23:01:23,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:01:23,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:01:23,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:01:23,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:01:23,233 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-23 23:01:23,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:01:23,283 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2019-11-23 23:01:23,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:01:23,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:01:23,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:01:23,295 INFO L225 Difference]: With dead ends: 17 [2019-11-23 23:01:23,295 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 23:01:23,298 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 23:01:23,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 23:01:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 23:01:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 23:01:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-11-23 23:01:23,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2019-11-23 23:01:23,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:01:23,334 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-23 23:01:23,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:01:23,334 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-11-23 23:01:23,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:01:23,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:23,335 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:23,335 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:23,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:23,336 INFO L82 PathProgramCache]: Analyzing trace with hash -575763962, now seen corresponding path program 1 times [2019-11-23 23:01:23,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:23,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735430783] [2019-11-23 23:01:23,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:23,396 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 23:01:23,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735430783] [2019-11-23 23:01:23,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:01:23,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:01:23,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558138329] [2019-11-23 23:01:23,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:01:23,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:01:23,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:01:23,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:01:23,401 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 3 states. [2019-11-23 23:01:23,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:01:23,437 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2019-11-23 23:01:23,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:01:23,438 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:01:23,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:01:23,438 INFO L225 Difference]: With dead ends: 15 [2019-11-23 23:01:23,439 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 23:01:23,439 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 23:01:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 23:01:23,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 23:01:23,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:01:23,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-11-23 23:01:23,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2019-11-23 23:01:23,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:01:23,443 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-11-23 23:01:23,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:01:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2019-11-23 23:01:23,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:01:23,444 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:23,445 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:23,445 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:23,446 INFO L82 PathProgramCache]: Analyzing trace with hash -669740056, now seen corresponding path program 1 times [2019-11-23 23:01:23,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:23,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681010220] [2019-11-23 23:01:23,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:01:23,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681010220] [2019-11-23 23:01:23,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766178133] [2019-11-23 23:01:23,517 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 23:01:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:23,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:01:23,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:01:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:01:23,600 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:01:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:01:23,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1906637382] [2019-11-23 23:01:23,673 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:01:23,673 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:01:23,680 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:01:23,687 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:01:23,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:01:34,760 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2019-11-23 23:01:34,898 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 184 [2019-11-23 23:01:44,608 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 224 [2019-11-23 23:01:58,460 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 269 [2019-11-23 23:02:04,862 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 285 [2019-11-23 23:02:15,293 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 303 [2019-11-23 23:02:17,638 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 306 [2019-11-23 23:02:20,034 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 313 [2019-11-23 23:02:22,551 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 317 [2019-11-23 23:02:22,772 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 320 [2019-11-23 23:02:22,997 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 323 [2019-11-23 23:02:23,223 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 327 [2019-11-23 23:02:25,827 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2019-11-23 23:02:25,948 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 329 [2019-11-23 23:02:26,167 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 330 [2019-11-23 23:02:26,392 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 333 [2019-11-23 23:02:26,550 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2019-11-23 23:02:26,664 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 335 [2019-11-23 23:02:26,790 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2019-11-23 23:02:26,908 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 337 [2019-11-23 23:02:27,034 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2019-11-23 23:02:27,155 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 341 [2019-11-23 23:02:30,590 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2019-11-23 23:02:30,719 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 344 [2019-11-23 23:02:30,852 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2019-11-23 23:02:30,970 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 347 [2019-11-23 23:02:34,166 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2019-11-23 23:02:34,295 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 351 [2019-11-23 23:02:37,621 WARN L192 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 358 [2019-11-23 23:02:37,898 WARN L192 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 354 [2019-11-23 23:02:41,181 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2019-11-23 23:02:41,309 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 358 [2019-11-23 23:02:44,094 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 364 [2019-11-23 23:02:44,234 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 360 [2019-11-23 23:02:44,376 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2019-11-23 23:02:44,508 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 361 [2019-11-23 23:02:44,657 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-11-23 23:02:44,785 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2019-11-23 23:02:47,943 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 369 [2019-11-23 23:02:48,086 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 368 [2019-11-23 23:02:48,234 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 370 [2019-11-23 23:02:48,369 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 371 [2019-11-23 23:02:51,349 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 378 [2019-11-23 23:02:51,522 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 375