/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:17:24,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:17:24,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:17:24,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:17:24,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:17:24,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:17:24,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:17:24,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:17:24,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:17:24,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:17:24,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:17:24,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:17:24,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:17:24,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:17:24,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:17:24,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:17:24,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:17:24,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:17:24,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:17:24,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:17:24,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:17:24,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:17:24,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:17:24,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:17:24,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:17:24,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-23 23:17:24,483 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:17:24,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:17:24,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:17:24,484 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:17:24,484 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:17:24,484 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:17:24,484 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:17:24,485 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:17:24,485 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:17:24,485 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:17:24,485 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:17:24,485 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:17:24,486 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:17:24,486 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:17:24,486 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:17:24,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:17:24,487 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:17:24,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:17:24,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:17:24,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:17:24,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:17:24,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:17:24,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:17:24,488 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:17:24,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:17:24,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:17:24,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:17:24,489 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:17:24,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:17:24,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:17:24,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:17:24,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:17:24,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:17:24,490 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:17:24,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:17:24,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:17:24,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:17:24,491 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:17:24,812 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:17:24,829 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:17:24,833 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:17:24,836 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:17:24,836 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:17:24,837 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2019-11-23 23:17:24,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69f6d9266/dac349e1cf2f44668207678bdb7483bc/FLAG6bd77e23e [2019-11-23 23:17:25,392 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:17:25,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2019-11-23 23:17:25,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69f6d9266/dac349e1cf2f44668207678bdb7483bc/FLAG6bd77e23e [2019-11-23 23:17:25,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69f6d9266/dac349e1cf2f44668207678bdb7483bc [2019-11-23 23:17:25,806 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:17:25,808 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:17:25,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:17:25,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:17:25,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:17:25,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:17:25" (1/1) ... [2019-11-23 23:17:25,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71e1a5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:25, skipping insertion in model container [2019-11-23 23:17:25,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:17:25" (1/1) ... [2019-11-23 23:17:25,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:17:25,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:17:26,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:17:26,033 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:17:26,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:17:26,067 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:17:26,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:26 WrapperNode [2019-11-23 23:17:26,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:17:26,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:17:26,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:17:26,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:17:26,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:26" (1/1) ... [2019-11-23 23:17:26,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:26" (1/1) ... [2019-11-23 23:17:26,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:17:26,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:17:26,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:17:26,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:17:26,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:26" (1/1) ... [2019-11-23 23:17:26,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:26" (1/1) ... [2019-11-23 23:17:26,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:26" (1/1) ... [2019-11-23 23:17:26,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:26" (1/1) ... [2019-11-23 23:17:26,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:26" (1/1) ... [2019-11-23 23:17:26,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:26" (1/1) ... [2019-11-23 23:17:26,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:26" (1/1) ... [2019-11-23 23:17:26,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:17:26,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:17:26,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:17:26,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:17:26,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:17:26,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:17:26,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:17:26,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:17:26,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:17:26,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:17:26,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:17:26,605 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:17:26,605 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 23:17:26,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:17:26 BoogieIcfgContainer [2019-11-23 23:17:26,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:17:26,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:17:26,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:17:26,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:17:26,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:17:25" (1/3) ... [2019-11-23 23:17:26,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf5dc2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:17:26, skipping insertion in model container [2019-11-23 23:17:26,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:26" (2/3) ... [2019-11-23 23:17:26,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf5dc2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:17:26, skipping insertion in model container [2019-11-23 23:17:26,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:17:26" (3/3) ... [2019-11-23 23:17:26,613 INFO L109 eAbstractionObserver]: Analyzing ICFG array_monotonic.i [2019-11-23 23:17:26,621 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:17:26,627 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:17:26,638 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:17:26,658 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:17:26,658 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:17:26,658 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:17:26,659 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:17:26,659 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:17:26,659 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:17:26,659 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:17:26,659 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:17:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-23 23:17:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:17:26,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:17:26,677 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:17:26,677 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:17:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:17:26,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1807029430, now seen corresponding path program 1 times [2019-11-23 23:17:26,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:17:26,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852873279] [2019-11-23 23:17:26,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:17:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:17:26,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852873279] [2019-11-23 23:17:26,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:17:26,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:17:26,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339662632] [2019-11-23 23:17:26,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:17:26,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:17:26,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:17:26,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:17:26,870 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-23 23:17:26,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:17:26,967 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2019-11-23 23:17:26,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:17:26,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:17:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:17:26,981 INFO L225 Difference]: With dead ends: 26 [2019-11-23 23:17:26,982 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 23:17:26,988 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:17:27,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 23:17:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2019-11-23 23:17:27,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:17:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-11-23 23:17:27,029 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2019-11-23 23:17:27,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:17:27,029 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-11-23 23:17:27,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:17:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2019-11-23 23:17:27,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:17:27,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:17:27,031 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:17:27,031 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:17:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:17:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash -13501899, now seen corresponding path program 1 times [2019-11-23 23:17:27,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:17:27,032 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981452638] [2019-11-23 23:17:27,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:17:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:17:27,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981452638] [2019-11-23 23:17:27,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502864652] [2019-11-23 23:17:27,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:17:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:17:27,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:17:27,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:17:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:17:27,237 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:17:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:17:27,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881334302] [2019-11-23 23:17:27,282 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:17:27,283 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:17:27,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:17:27,295 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:17:27,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:17:31,863 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 155 [2019-11-23 23:17:34,571 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 156 [2019-11-23 23:17:51,213 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 150 [2019-11-23 23:18:09,485 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 195 [2019-11-23 23:18:20,075 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 192 [2019-11-23 23:18:25,932 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 211 [2019-11-23 23:18:31,681 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2019-11-23 23:18:37,516 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 210 [2019-11-23 23:18:43,990 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 215 [2019-11-23 23:18:50,051 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 209 [2019-11-23 23:18:56,168 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 217