/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/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 03:32:00,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 03:32:00,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 03:32:00,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 03:32:00,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 03:32:00,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 03:32:00,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 03:32:00,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 03:32:00,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 03:32:00,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 03:32:00,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 03:32:00,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 03:32:00,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 03:32:00,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 03:32:00,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 03:32:00,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 03:32:00,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 03:32:00,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 03:32:00,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 03:32:00,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 03:32:00,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 03:32:00,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 03:32:00,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 03:32:00,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 03:32:00,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 03:32:00,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 03:32:00,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 03:32:00,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 03:32:00,904 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 [2019-11-24 03:32:00,930 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 03:32:00,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 03:32:00,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 03:32:00,932 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 03:32:00,932 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 03:32:00,933 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 03:32:00,933 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 03:32:00,933 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 03:32:00,933 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 03:32:00,933 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 03:32:00,935 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 03:32:00,935 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 03:32:00,935 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 03:32:00,936 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 03:32:00,936 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 03:32:00,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 03:32:00,938 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 03:32:00,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 03:32:00,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 03:32:00,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 03:32:00,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 03:32:00,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 03:32:00,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 03:32:00,939 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 03:32:00,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 03:32:00,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 03:32:00,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 03:32:00,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 03:32:00,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 03:32:00,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 03:32:00,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 03:32:00,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 03:32:00,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 03:32:00,943 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 03:32:00,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 03:32:00,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 03:32:00,944 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 03:32:00,944 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 03:32:01,254 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 03:32:01,264 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 03:32:01,269 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 03:32:01,275 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 03:32:01,276 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 03:32:01,276 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-11-24 03:32:01,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc4d59fb1/8c0b0ed0ba9b49d18a43f9683450f6dc/FLAGff2ba4812 [2019-11-24 03:32:02,069 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 03:32:02,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-11-24 03:32:02,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc4d59fb1/8c0b0ed0ba9b49d18a43f9683450f6dc/FLAGff2ba4812 [2019-11-24 03:32:02,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc4d59fb1/8c0b0ed0ba9b49d18a43f9683450f6dc [2019-11-24 03:32:02,201 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 03:32:02,203 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 03:32:02,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 03:32:02,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 03:32:02,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 03:32:02,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:32:02" (1/1) ... [2019-11-24 03:32:02,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5badadff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:02, skipping insertion in model container [2019-11-24 03:32:02,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:32:02" (1/1) ... [2019-11-24 03:32:02,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 03:32:02,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 03:32:03,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:32:03,486 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 03:32:03,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:32:03,824 INFO L208 MainTranslator]: Completed translation [2019-11-24 03:32:03,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:03 WrapperNode [2019-11-24 03:32:03,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 03:32:03,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 03:32:03,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 03:32:03,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 03:32:03,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:03" (1/1) ... [2019-11-24 03:32:03,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:03" (1/1) ... [2019-11-24 03:32:04,115 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 03:32:04,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 03:32:04,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 03:32:04,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 03:32:04,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:03" (1/1) ... [2019-11-24 03:32:04,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:03" (1/1) ... [2019-11-24 03:32:04,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:03" (1/1) ... [2019-11-24 03:32:04,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:03" (1/1) ... [2019-11-24 03:32:04,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:03" (1/1) ... [2019-11-24 03:32:04,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:03" (1/1) ... [2019-11-24 03:32:04,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:03" (1/1) ... [2019-11-24 03:32:04,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 03:32:04,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 03:32:04,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 03:32:04,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 03:32:04,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:03" (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 [2019-11-24 03:32:04,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 03:32:04,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 03:32:04,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 03:32:04,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 03:32:04,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 03:32:04,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 03:32:04,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 03:32:04,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 03:32:04,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 03:32:04,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 03:32:04,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 03:32:17,644 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 03:32:17,645 INFO L284 CfgBuilder]: Removed 1169 assume(true) statements. [2019-11-24 03:32:17,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:32:17 BoogieIcfgContainer [2019-11-24 03:32:17,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 03:32:17,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 03:32:17,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 03:32:17,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 03:32:17,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 03:32:02" (1/3) ... [2019-11-24 03:32:17,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba48a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:32:17, skipping insertion in model container [2019-11-24 03:32:17,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:03" (2/3) ... [2019-11-24 03:32:17,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba48a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:32:17, skipping insertion in model container [2019-11-24 03:32:17,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:32:17" (3/3) ... [2019-11-24 03:32:17,654 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-11-24 03:32:17,664 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 03:32:17,672 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 03:32:17,680 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 03:32:17,705 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 03:32:17,705 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 03:32:17,705 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 03:32:17,705 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 03:32:17,705 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 03:32:17,705 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 03:32:17,705 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 03:32:17,705 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 03:32:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states. [2019-11-24 03:32:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 03:32:17,731 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:32:17,732 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:32:17,733 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:32:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:32:17,740 INFO L82 PathProgramCache]: Analyzing trace with hash 279047467, now seen corresponding path program 1 times [2019-11-24 03:32:17,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:32:17,750 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761402758] [2019-11-24 03:32:17,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:32:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:32:18,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761402758] [2019-11-24 03:32:18,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:32:18,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:32:18,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183205145] [2019-11-24 03:32:18,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:32:18,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:32:18,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:32:18,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:32:18,351 INFO L87 Difference]: Start difference. First operand 144 states. Second operand 3 states. [2019-11-24 03:32:18,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:32:18,648 INFO L93 Difference]: Finished difference Result 383 states and 652 transitions. [2019-11-24 03:32:18,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:32:18,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-24 03:32:18,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:32:18,678 INFO L225 Difference]: With dead ends: 383 [2019-11-24 03:32:18,679 INFO L226 Difference]: Without dead ends: 240 [2019-11-24 03:32:18,687 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 [2019-11-24 03:32:18,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-11-24 03:32:18,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2019-11-24 03:32:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2019-11-24 03:32:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 405 transitions. [2019-11-24 03:32:18,754 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 405 transitions. Word has length 19 [2019-11-24 03:32:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:32:18,755 INFO L462 AbstractCegarLoop]: Abstraction has 240 states and 405 transitions. [2019-11-24 03:32:18,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:32:18,755 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 405 transitions. [2019-11-24 03:32:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-24 03:32:18,757 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:32:18,757 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] [2019-11-24 03:32:18,758 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:32:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:32:18,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1657307243, now seen corresponding path program 1 times [2019-11-24 03:32:18,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:32:18,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82774941] [2019-11-24 03:32:18,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:32:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:32:18,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82774941] [2019-11-24 03:32:18,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:32:18,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 03:32:18,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619280912] [2019-11-24 03:32:18,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:32:18,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:32:18,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:32:18,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:32:18,954 INFO L87 Difference]: Start difference. First operand 240 states and 405 transitions. Second operand 3 states. [2019-11-24 03:32:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:32:19,004 INFO L93 Difference]: Finished difference Result 467 states and 785 transitions. [2019-11-24 03:32:19,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:32:19,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-24 03:32:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:32:19,009 INFO L225 Difference]: With dead ends: 467 [2019-11-24 03:32:19,009 INFO L226 Difference]: Without dead ends: 464 [2019-11-24 03:32:19,010 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 [2019-11-24 03:32:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2019-11-24 03:32:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2019-11-24 03:32:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2019-11-24 03:32:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 781 transitions. [2019-11-24 03:32:19,073 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 781 transitions. Word has length 23 [2019-11-24 03:32:19,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:32:19,073 INFO L462 AbstractCegarLoop]: Abstraction has 464 states and 781 transitions. [2019-11-24 03:32:19,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:32:19,074 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 781 transitions. [2019-11-24 03:32:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-24 03:32:19,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:32:19,082 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:32:19,085 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:32:19,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:32:19,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1525618588, now seen corresponding path program 1 times [2019-11-24 03:32:19,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:32:19,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955046489] [2019-11-24 03:32:19,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:32:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:32:19,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955046489] [2019-11-24 03:32:19,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:32:19,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:32:19,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784286651] [2019-11-24 03:32:19,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:32:19,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:32:19,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:32:19,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:32:19,232 INFO L87 Difference]: Start difference. First operand 464 states and 781 transitions. Second operand 3 states. [2019-11-24 03:32:19,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:32:19,325 INFO L93 Difference]: Finished difference Result 800 states and 1344 transitions. [2019-11-24 03:32:19,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:32:19,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2019-11-24 03:32:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:32:19,329 INFO L225 Difference]: With dead ends: 800 [2019-11-24 03:32:19,329 INFO L226 Difference]: Without dead ends: 347 [2019-11-24 03:32:19,332 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 [2019-11-24 03:32:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2019-11-24 03:32:19,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 344. [2019-11-24 03:32:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2019-11-24 03:32:19,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 579 transitions. [2019-11-24 03:32:19,353 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 579 transitions. Word has length 38 [2019-11-24 03:32:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:32:19,353 INFO L462 AbstractCegarLoop]: Abstraction has 344 states and 579 transitions. [2019-11-24 03:32:19,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:32:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 579 transitions. [2019-11-24 03:32:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-24 03:32:19,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:32:19,356 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:32:19,357 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:32:19,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:32:19,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1310861814, now seen corresponding path program 1 times [2019-11-24 03:32:19,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:32:19,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721422487] [2019-11-24 03:32:19,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:32:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 03:32:19,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721422487] [2019-11-24 03:32:19,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:32:19,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 03:32:19,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599503344] [2019-11-24 03:32:19,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:32:19,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:32:19,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:32:19,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:32:19,518 INFO L87 Difference]: Start difference. First operand 344 states and 579 transitions. Second operand 3 states. [2019-11-24 03:32:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:32:19,536 INFO L93 Difference]: Finished difference Result 662 states and 1115 transitions. [2019-11-24 03:32:19,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:32:19,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2019-11-24 03:32:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:32:19,539 INFO L225 Difference]: With dead ends: 662 [2019-11-24 03:32:19,540 INFO L226 Difference]: Without dead ends: 344 [2019-11-24 03:32:19,541 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 [2019-11-24 03:32:19,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2019-11-24 03:32:19,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2019-11-24 03:32:19,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2019-11-24 03:32:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 575 transitions. [2019-11-24 03:32:19,556 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 575 transitions. Word has length 53 [2019-11-24 03:32:19,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:32:19,557 INFO L462 AbstractCegarLoop]: Abstraction has 344 states and 575 transitions. [2019-11-24 03:32:19,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:32:19,557 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 575 transitions. [2019-11-24 03:32:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-24 03:32:19,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:32:19,559 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:32:19,559 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:32:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:32:19,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1068351565, now seen corresponding path program 1 times [2019-11-24 03:32:19,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:32:19,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785085734] [2019-11-24 03:32:19,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:32:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:32:19,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785085734] [2019-11-24 03:32:19,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394799515] [2019-11-24 03:32:19,925 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 [2019-11-24 03:32:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:20,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 1463 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 03:32:20,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:32:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 03:32:20,479 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:32:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 03:32:20,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 03:32:20,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 6 [2019-11-24 03:32:20,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589070900] [2019-11-24 03:32:20,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:32:20,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:32:20,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:32:20,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 03:32:20,530 INFO L87 Difference]: Start difference. First operand 344 states and 575 transitions. Second operand 3 states. [2019-11-24 03:32:20,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:32:20,551 INFO L93 Difference]: Finished difference Result 662 states and 1107 transitions. [2019-11-24 03:32:20,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:32:20,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2019-11-24 03:32:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:32:20,555 INFO L225 Difference]: With dead ends: 662 [2019-11-24 03:32:20,555 INFO L226 Difference]: Without dead ends: 344 [2019-11-24 03:32:20,557 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 03:32:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2019-11-24 03:32:20,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2019-11-24 03:32:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2019-11-24 03:32:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 573 transitions. [2019-11-24 03:32:20,580 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 573 transitions. Word has length 54 [2019-11-24 03:32:20,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:32:20,582 INFO L462 AbstractCegarLoop]: Abstraction has 344 states and 573 transitions. [2019-11-24 03:32:20,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:32:20,582 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 573 transitions. [2019-11-24 03:32:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-24 03:32:20,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:32:20,584 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:32:20,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:32:20,792 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:32:20,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:32:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash -583386809, now seen corresponding path program 1 times [2019-11-24 03:32:20,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:32:20,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741387354] [2019-11-24 03:32:20,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:32:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-24 03:32:23,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741387354] [2019-11-24 03:32:23,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:32:23,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 03:32:23,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325365313] [2019-11-24 03:32:23,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:32:23,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:32:23,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:32:23,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:32:23,067 INFO L87 Difference]: Start difference. First operand 344 states and 573 transitions. Second operand 3 states. [2019-11-24 03:32:23,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:32:23,154 INFO L93 Difference]: Finished difference Result 694 states and 1159 transitions. [2019-11-24 03:32:23,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:32:23,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2019-11-24 03:32:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:32:23,158 INFO L225 Difference]: With dead ends: 694 [2019-11-24 03:32:23,158 INFO L226 Difference]: Without dead ends: 352 [2019-11-24 03:32:23,159 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 [2019-11-24 03:32:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2019-11-24 03:32:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2019-11-24 03:32:23,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2019-11-24 03:32:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 581 transitions. [2019-11-24 03:32:23,182 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 581 transitions. Word has length 55 [2019-11-24 03:32:23,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:32:23,183 INFO L462 AbstractCegarLoop]: Abstraction has 352 states and 581 transitions. [2019-11-24 03:32:23,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:32:23,183 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 581 transitions. [2019-11-24 03:32:23,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-24 03:32:23,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:32:23,185 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 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] [2019-11-24 03:32:23,185 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:32:23,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:32:23,186 INFO L82 PathProgramCache]: Analyzing trace with hash -849290755, now seen corresponding path program 1 times [2019-11-24 03:32:23,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:32:23,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794070915] [2019-11-24 03:32:23,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:32:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-24 03:32:25,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794070915] [2019-11-24 03:32:25,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:32:25,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:32:25,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109782547] [2019-11-24 03:32:25,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:32:25,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:32:25,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:32:25,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:32:25,077 INFO L87 Difference]: Start difference. First operand 352 states and 581 transitions. Second operand 3 states. [2019-11-24 03:32:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:32:25,139 INFO L93 Difference]: Finished difference Result 698 states and 1155 transitions. [2019-11-24 03:32:25,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:32:25,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2019-11-24 03:32:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:32:25,142 INFO L225 Difference]: With dead ends: 698 [2019-11-24 03:32:25,142 INFO L226 Difference]: Without dead ends: 356 [2019-11-24 03:32:25,144 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 [2019-11-24 03:32:25,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2019-11-24 03:32:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2019-11-24 03:32:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2019-11-24 03:32:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 585 transitions. [2019-11-24 03:32:25,164 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 585 transitions. Word has length 61 [2019-11-24 03:32:25,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:32:25,164 INFO L462 AbstractCegarLoop]: Abstraction has 356 states and 585 transitions. [2019-11-24 03:32:25,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:32:25,164 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 585 transitions. [2019-11-24 03:32:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-24 03:32:25,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:32:25,166 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 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, 1, 1, 1] [2019-11-24 03:32:25,166 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:32:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:32:25,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1566158335, now seen corresponding path program 1 times [2019-11-24 03:32:25,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:32:25,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765895013] [2019-11-24 03:32:25,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:32:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-24 03:32:28,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765895013] [2019-11-24 03:32:28,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642267442] [2019-11-24 03:32:28,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 03:32:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:31,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-24 03:32:31,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:32:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-24 03:32:31,375 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:32:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-24 03:32:31,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1738722866] [2019-11-24 03:32:31,468 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2019-11-24 03:32:31,468 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 03:32:31,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 03:32:31,484 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 03:32:31,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 03:32:32,011 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 03:32:32,381 WARN L192 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 801 [2019-11-24 03:33:31,892 WARN L192 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 832