/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-crafted/zero_sum_const5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:58:08,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:58:08,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:58:08,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:58:08,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:58:08,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:58:08,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:58:08,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:58:08,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:58:08,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:58:08,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:58:08,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:58:08,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:58:08,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:58:08,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:58:08,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:58:08,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:58:08,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:58:08,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:58:08,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:58:08,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:58:08,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:58:08,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:58:08,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:58:08,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:58:08,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:58:08,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:58:08,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:58:08,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:58:08,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:58:08,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:58:08,708 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:58:08,708 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:58:08,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:58:08,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:58:08,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:58:08,711 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 22:58:08,726 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:58:08,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:58:08,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:58:08,728 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:58:08,728 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:58:08,728 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:58:08,728 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:58:08,729 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:58:08,729 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:58:08,729 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:58:08,729 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:58:08,729 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:58:08,730 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:58:08,730 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:58:08,730 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:58:08,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:58:08,731 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:58:08,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:58:08,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:58:08,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:58:08,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:58:08,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:58:08,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:58:08,732 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:58:08,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:58:08,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:58:08,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:58:08,733 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:58:08,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:58:08,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:58:08,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:58:08,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:58:08,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:58:08,734 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:58:08,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:58:08,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:58:08,735 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:58:08,735 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:58:09,028 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:58:09,045 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:58:09,049 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:58:09,051 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:58:09,051 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:58:09,052 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2019-11-23 22:58:09,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8da896ce2/4fb94cbedec54ec5af603bcc6e895c9f/FLAG21e4381b3 [2019-11-23 22:58:09,575 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:58:09,576 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2019-11-23 22:58:09,586 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8da896ce2/4fb94cbedec54ec5af603bcc6e895c9f/FLAG21e4381b3 [2019-11-23 22:58:09,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8da896ce2/4fb94cbedec54ec5af603bcc6e895c9f [2019-11-23 22:58:09,974 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:58:09,975 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:58:09,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:58:09,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:58:09,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:58:09,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:58:09" (1/1) ... [2019-11-23 22:58:09,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee337c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:09, skipping insertion in model container [2019-11-23 22:58:09,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:58:09" (1/1) ... [2019-11-23 22:58:09,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:58:10,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:58:10,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:58:10,247 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:58:10,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:58:10,287 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:58:10,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10 WrapperNode [2019-11-23 22:58:10,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:58:10,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:58:10,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:58:10,289 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:58:10,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,416 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:58:10,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:58:10,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:58:10,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:58:10,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:58:10,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:58:10,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:58:10,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:58:10,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (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 22:58:10,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:58:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 22:58:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:58:10,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:58:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:58:11,054 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:58:11,054 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-23 22:58:11,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:58:11 BoogieIcfgContainer [2019-11-23 22:58:11,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:58:11,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:58:11,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:58:11,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:58:11,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:58:09" (1/3) ... [2019-11-23 22:58:11,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bce7855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:58:11, skipping insertion in model container [2019-11-23 22:58:11,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (2/3) ... [2019-11-23 22:58:11,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bce7855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:58:11, skipping insertion in model container [2019-11-23 22:58:11,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:58:11" (3/3) ... [2019-11-23 22:58:11,067 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2019-11-23 22:58:11,077 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:58:11,087 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:58:11,100 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:58:11,133 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:58:11,133 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:58:11,133 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:58:11,134 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:58:11,134 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:58:11,134 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:58:11,134 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:58:11,135 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:58:11,151 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-23 22:58:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:58:11,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:11,160 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:11,161 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:11,168 INFO L82 PathProgramCache]: Analyzing trace with hash -431001582, now seen corresponding path program 1 times [2019-11-23 22:58:11,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:11,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962837422] [2019-11-23 22:58:11,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:11,391 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 22:58:11,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962837422] [2019-11-23 22:58:11,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:11,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:58:11,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840818137] [2019-11-23 22:58:11,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:58:11,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:11,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:58:11,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:58:11,413 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2019-11-23 22:58:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:11,527 INFO L93 Difference]: Finished difference Result 37 states and 57 transitions. [2019-11-23 22:58:11,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:58:11,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 22:58:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:11,541 INFO L225 Difference]: With dead ends: 37 [2019-11-23 22:58:11,541 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:58:11,547 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:58:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:58:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 22:58:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:58:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 45 transitions. [2019-11-23 22:58:11,597 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 45 transitions. Word has length 15 [2019-11-23 22:58:11,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:11,598 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 45 transitions. [2019-11-23 22:58:11,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:58:11,598 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 45 transitions. [2019-11-23 22:58:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:58:11,599 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:11,599 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:11,600 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:11,600 INFO L82 PathProgramCache]: Analyzing trace with hash 904916989, now seen corresponding path program 1 times [2019-11-23 22:58:11,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:11,601 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348136981] [2019-11-23 22:58:11,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:11,668 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 22:58:11,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348136981] [2019-11-23 22:58:11,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:11,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:58:11,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367333392] [2019-11-23 22:58:11,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:58:11,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:11,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:58:11,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:58:11,676 INFO L87 Difference]: Start difference. First operand 26 states and 45 transitions. Second operand 3 states. [2019-11-23 22:58:11,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:11,767 INFO L93 Difference]: Finished difference Result 50 states and 88 transitions. [2019-11-23 22:58:11,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:58:11,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-23 22:58:11,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:11,769 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:58:11,769 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:58:11,770 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 22:58:11,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:58:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 22:58:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:58:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 46 transitions. [2019-11-23 22:58:11,780 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 46 transitions. Word has length 16 [2019-11-23 22:58:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:11,780 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 46 transitions. [2019-11-23 22:58:11,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:58:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 46 transitions. [2019-11-23 22:58:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:58:11,782 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:11,782 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:11,782 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:11,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:11,783 INFO L82 PathProgramCache]: Analyzing trace with hash 178717679, now seen corresponding path program 1 times [2019-11-23 22:58:11,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:11,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225265345] [2019-11-23 22:58:11,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:58:11,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225265345] [2019-11-23 22:58:11,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:11,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:58:11,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521915820] [2019-11-23 22:58:11,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:58:11,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:11,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:58:11,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:58:11,873 INFO L87 Difference]: Start difference. First operand 27 states and 46 transitions. Second operand 4 states. [2019-11-23 22:58:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:11,973 INFO L93 Difference]: Finished difference Result 48 states and 84 transitions. [2019-11-23 22:58:11,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:58:11,975 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-23 22:58:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:11,976 INFO L225 Difference]: With dead ends: 48 [2019-11-23 22:58:11,976 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:58:11,977 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:58:11,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:58:11,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 22:58:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:58:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-23 22:58:11,985 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2019-11-23 22:58:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:11,985 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-23 22:58:11,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:58:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-23 22:58:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:58:12,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:12,001 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:12,001 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:12,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:12,002 INFO L82 PathProgramCache]: Analyzing trace with hash -854665082, now seen corresponding path program 1 times [2019-11-23 22:58:12,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:12,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150682462] [2019-11-23 22:58:12,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:58:12,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150682462] [2019-11-23 22:58:12,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516810856] [2019-11-23 22:58:12,116 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 22:58:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:12,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:58:12,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:58:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:58:12,248 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:58:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:58:12,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [945813385] [2019-11-23 22:58:12,341 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-23 22:58:12,343 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:58:12,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:58:12,361 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:58:12,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:58:13,212 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 103 [2019-11-23 22:58:14,214 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 129 [2019-11-23 22:58:14,359 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 129 [2019-11-23 22:58:14,514 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-11-23 22:58:14,655 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 133 [2019-11-23 22:58:14,892 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 136 [2019-11-23 22:58:27,489 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2019-11-23 22:58:40,855 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 233 [2019-11-23 22:59:05,753 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 291 [2019-11-23 22:59:14,269 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 306 [2019-11-23 22:59:16,302 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 307 [2019-11-23 22:59:21,875 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 319 [2019-11-23 22:59:22,121 WARN L192 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 317 [2019-11-23 22:59:26,674 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 324 [2019-11-23 22:59:29,229 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 327 [2019-11-23 22:59:31,652 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 330 [2019-11-23 22:59:31,765 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 329 [2019-11-23 22:59:34,210 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 339 [2019-11-23 22:59:34,334 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 337 [2019-11-23 22:59:36,845 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2019-11-23 22:59:36,980 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 340 [2019-11-23 22:59:39,422 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 345 [2019-11-23 22:59:39,543 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 343 [2019-11-23 22:59:42,148 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-11-23 22:59:42,296 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 347