/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:02:57,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:02:57,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:02:57,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:02:57,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:02:57,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:02:57,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:02:57,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:02:57,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:02:57,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:02:57,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:02:57,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:02:57,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:02:57,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:02:57,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:02:57,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:02:57,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:02:57,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:02:57,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:02:57,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:02:57,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:02:57,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:02:57,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:02:57,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:02:57,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:02:57,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:02:57,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:02:57,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:02:57,699 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 23:02:57,722 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:02:57,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:02:57,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:02:57,724 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:02:57,724 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:02:57,724 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:02:57,724 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:02:57,725 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:02:57,725 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:02:57,725 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:02:57,726 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:02:57,726 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:02:57,727 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:02:57,727 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:02:57,727 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:02:57,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:02:57,728 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:02:57,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:02:57,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:02:57,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:02:57,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:02:57,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:02:57,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:02:57,730 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:02:57,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:02:57,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:02:57,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:02:57,731 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:02:57,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:02:57,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:02:57,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:02:57,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:02:57,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:02:57,733 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:02:57,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:02:57,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:02:57,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:02:57,734 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:02:58,044 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:02:58,056 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:02:58,061 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:02:58,067 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:02:58,068 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:02:58,068 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2019-11-23 23:02:58,143 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa2124eb8/a19368b93d144ab6be222aac8ce0c9ac/FLAG3a892e0e4 [2019-11-23 23:02:58,567 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:02:58,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2019-11-23 23:02:58,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa2124eb8/a19368b93d144ab6be222aac8ce0c9ac/FLAG3a892e0e4 [2019-11-23 23:02:58,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa2124eb8/a19368b93d144ab6be222aac8ce0c9ac [2019-11-23 23:02:58,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:02:58,957 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:02:58,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:02:58,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:02:58,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:02:58,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:02:58" (1/1) ... [2019-11-23 23:02:58,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f6a1297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:58, skipping insertion in model container [2019-11-23 23:02:58,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:02:58" (1/1) ... [2019-11-23 23:02:58,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:02:58,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:02:59,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:02:59,176 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:02:59,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:02:59,216 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:02:59,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:59 WrapperNode [2019-11-23 23:02:59,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:02:59,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:02:59,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:02:59,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:02:59,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:59" (1/1) ... [2019-11-23 23:02:59,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:59" (1/1) ... [2019-11-23 23:02:59,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:02:59,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:02:59,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:02:59,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:02:59,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:59" (1/1) ... [2019-11-23 23:02:59,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:59" (1/1) ... [2019-11-23 23:02:59,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:59" (1/1) ... [2019-11-23 23:02:59,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:59" (1/1) ... [2019-11-23 23:02:59,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:59" (1/1) ... [2019-11-23 23:02:59,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:59" (1/1) ... [2019-11-23 23:02:59,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:59" (1/1) ... [2019-11-23 23:02:59,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:02:59,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:02:59,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:02:59,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:02:59,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:59" (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 23:02:59,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:02:59,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:02:59,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:02:59,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:02:59,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:02:59,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:02:59,781 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:02:59,782 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:02:59,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:02:59 BoogieIcfgContainer [2019-11-23 23:02:59,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:02:59,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:02:59,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:02:59,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:02:59,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:02:58" (1/3) ... [2019-11-23 23:02:59,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e48d42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:02:59, skipping insertion in model container [2019-11-23 23:02:59,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:59" (2/3) ... [2019-11-23 23:02:59,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e48d42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:02:59, skipping insertion in model container [2019-11-23 23:02:59,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:02:59" (3/3) ... [2019-11-23 23:02:59,795 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-1.i [2019-11-23 23:02:59,805 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:02:59,811 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:02:59,821 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:02:59,846 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:02:59,847 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:02:59,847 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:02:59,847 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:02:59,847 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:02:59,847 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:02:59,847 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:02:59,847 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:02:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 23:02:59,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:02:59,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:02:59,866 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:02:59,866 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:02:59,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:02:59,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1684850581, now seen corresponding path program 1 times [2019-11-23 23:02:59,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:02:59,879 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094894380] [2019-11-23 23:02:59,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:02:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:03:00,029 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 23:03:00,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094894380] [2019-11-23 23:03:00,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:03:00,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:03:00,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751723088] [2019-11-23 23:03:00,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:03:00,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:03:00,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:03:00,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:03:00,049 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-23 23:03:00,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:03:00,085 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2019-11-23 23:03:00,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:03:00,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:03:00,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:03:00,098 INFO L225 Difference]: With dead ends: 17 [2019-11-23 23:03:00,098 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 23:03:00,102 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 23:03:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 23:03:00,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 23:03:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 23:03:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-11-23 23:03:00,135 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2019-11-23 23:03:00,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:03:00,136 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-23 23:03:00,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:03:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-11-23 23:03:00,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:03:00,137 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:03:00,137 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:03:00,137 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:03:00,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:03:00,138 INFO L82 PathProgramCache]: Analyzing trace with hash -836679679, now seen corresponding path program 1 times [2019-11-23 23:03:00,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:03:00,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852982527] [2019-11-23 23:03:00,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:03:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:03:00,197 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 23:03:00,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852982527] [2019-11-23 23:03:00,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:03:00,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:03:00,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395545003] [2019-11-23 23:03:00,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:03:00,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:03:00,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:03:00,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:03:00,202 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 3 states. [2019-11-23 23:03:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:03:00,235 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2019-11-23 23:03:00,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:03:00,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:03:00,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:03:00,238 INFO L225 Difference]: With dead ends: 15 [2019-11-23 23:03:00,238 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 23:03:00,239 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 23:03:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 23:03:00,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 23:03:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:03:00,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-11-23 23:03:00,242 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2019-11-23 23:03:00,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:03:00,243 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-11-23 23:03:00,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:03:00,243 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2019-11-23 23:03:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:03:00,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:03:00,244 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:03:00,244 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:03:00,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:03:00,245 INFO L82 PathProgramCache]: Analyzing trace with hash -175580864, now seen corresponding path program 1 times [2019-11-23 23:03:00,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:03:00,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846814602] [2019-11-23 23:03:00,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:03:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:03:00,307 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 23:03:00,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846814602] [2019-11-23 23:03:00,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634135767] [2019-11-23 23:03:00,308 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 23:03:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:03:00,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:03:00,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:03:00,420 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 23:03:00,421 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:03:00,452 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 23:03:00,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1523573902] [2019-11-23 23:03:00,480 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:03:00,480 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:03:00,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:03:00,496 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:03:00,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:03:28,997 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2019-11-23 23:03:29,183 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2019-11-23 23:03:29,367 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 238 [2019-11-23 23:03:36,494 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2019-11-23 23:03:36,642 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 254 [2019-11-23 23:04:02,153 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 303 [2019-11-23 23:04:04,310 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 308 [2019-11-23 23:04:07,258 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 315 [2019-11-23 23:04:09,867 WARN L192 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2019-11-23 23:04:10,038 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 319 [2019-11-23 23:04:12,268 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 323 [2019-11-23 23:04:14,541 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 326 [2019-11-23 23:04:16,729 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 330 [2019-11-23 23:04:19,082 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 333 [2019-11-23 23:04:21,887 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 338 [2019-11-23 23:04:22,101 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 339 [2019-11-23 23:04:22,330 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 343 [2019-11-23 23:04:24,606 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 351 [2019-11-23 23:04:24,715 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 348 [2019-11-23 23:04:27,334 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2019-11-23 23:04:27,446 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 352