/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--pc87413_wdt.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 03:32:14,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 03:32:14,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 03:32:14,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 03:32:14,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 03:32:14,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 03:32:14,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 03:32:14,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 03:32:14,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 03:32:14,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 03:32:14,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 03:32:14,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 03:32:14,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 03:32:14,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 03:32:14,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 03:32:14,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 03:32:14,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 03:32:14,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 03:32:14,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 03:32:14,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 03:32:14,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 03:32:14,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 03:32:14,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 03:32:14,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 03:32:14,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 03:32:14,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 03:32:14,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 03:32:14,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 03:32:14,593 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 03:32:14,607 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 03:32:14,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 03:32:14,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 03:32:14,608 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 03:32:14,609 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 03:32:14,609 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 03:32:14,609 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 03:32:14,609 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 03:32:14,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 03:32:14,610 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 03:32:14,610 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 03:32:14,610 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 03:32:14,610 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 03:32:14,610 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 03:32:14,611 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 03:32:14,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 03:32:14,611 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 03:32:14,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 03:32:14,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 03:32:14,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 03:32:14,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 03:32:14,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 03:32:14,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 03:32:14,613 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 03:32:14,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 03:32:14,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 03:32:14,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 03:32:14,614 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 03:32:14,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 03:32:14,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 03:32:14,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 03:32:14,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 03:32:14,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 03:32:14,615 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 03:32:14,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 03:32:14,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 03:32:14,615 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 03:32:14,616 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 03:32:14,900 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 03:32:14,909 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 03:32:14,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 03:32:14,914 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 03:32:14,915 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 03:32:14,915 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2019-11-24 03:32:14,979 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fae6e0683/7bba303d0ab24f868f795acddeb441b1/FLAGbd7a2062f [2019-11-24 03:32:15,661 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 03:32:15,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2019-11-24 03:32:15,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fae6e0683/7bba303d0ab24f868f795acddeb441b1/FLAGbd7a2062f [2019-11-24 03:32:15,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fae6e0683/7bba303d0ab24f868f795acddeb441b1 [2019-11-24 03:32:15,818 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 03:32:15,820 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 03:32:15,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 03:32:15,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 03:32:15,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 03:32:15,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:32:15" (1/1) ... [2019-11-24 03:32:15,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6a86ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:15, skipping insertion in model container [2019-11-24 03:32:15,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:32:15" (1/1) ... [2019-11-24 03:32:15,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 03:32:15,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 03:32:17,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:32:17,097 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 03:32:17,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:32:17,416 INFO L208 MainTranslator]: Completed translation [2019-11-24 03:32:17,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:17 WrapperNode [2019-11-24 03:32:17,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 03:32:17,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 03:32:17,417 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 03:32:17,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 03:32:17,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:17" (1/1) ... [2019-11-24 03:32:17,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:17" (1/1) ... [2019-11-24 03:32:17,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 03:32:17,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 03:32:17,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 03:32:17,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 03:32:17,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:17" (1/1) ... [2019-11-24 03:32:17,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:17" (1/1) ... [2019-11-24 03:32:17,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:17" (1/1) ... [2019-11-24 03:32:17,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:17" (1/1) ... [2019-11-24 03:32:17,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:17" (1/1) ... [2019-11-24 03:32:17,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:17" (1/1) ... [2019-11-24 03:32:17,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:17" (1/1) ... [2019-11-24 03:32:17,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 03:32:17,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 03:32:17,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 03:32:17,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 03:32:17,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:17" (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 03:32:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 03:32:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 03:32:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 03:32:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 03:32:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 03:32:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 03:32:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 03:32:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 03:32:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 03:32:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 03:32:17,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 03:32:26,316 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 03:32:26,317 INFO L284 CfgBuilder]: Removed 1159 assume(true) statements. [2019-11-24 03:32:26,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:32:26 BoogieIcfgContainer [2019-11-24 03:32:26,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 03:32:26,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 03:32:26,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 03:32:26,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 03:32:26,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 03:32:15" (1/3) ... [2019-11-24 03:32:26,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a595cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:32:26, skipping insertion in model container [2019-11-24 03:32:26,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:32:17" (2/3) ... [2019-11-24 03:32:26,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a595cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:32:26, skipping insertion in model container [2019-11-24 03:32:26,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:32:26" (3/3) ... [2019-11-24 03:32:26,327 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2019-11-24 03:32:26,337 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 03:32:26,346 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 03:32:26,358 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 03:32:26,386 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 03:32:26,386 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 03:32:26,386 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 03:32:26,387 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 03:32:26,387 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 03:32:26,387 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 03:32:26,387 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 03:32:26,387 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 03:32:26,407 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2019-11-24 03:32:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 03:32:26,416 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:32:26,417 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 03:32:26,417 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:32:26,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:32:26,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1152554297, now seen corresponding path program 1 times [2019-11-24 03:32:26,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:32:26,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000756717] [2019-11-24 03:32:26,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:32:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:27,001 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 03:32:27,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000756717] [2019-11-24 03:32:27,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:32:27,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:32:27,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010850652] [2019-11-24 03:32:27,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:32:27,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:32:27,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:32:27,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:32:27,029 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 3 states. [2019-11-24 03:32:27,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:32:27,240 INFO L93 Difference]: Finished difference Result 202 states and 347 transitions. [2019-11-24 03:32:27,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:32:27,242 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-24 03:32:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:32:27,255 INFO L225 Difference]: With dead ends: 202 [2019-11-24 03:32:27,256 INFO L226 Difference]: Without dead ends: 124 [2019-11-24 03:32:27,260 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 03:32:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-24 03:32:27,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2019-11-24 03:32:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-24 03:32:27,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 208 transitions. [2019-11-24 03:32:27,313 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 208 transitions. Word has length 19 [2019-11-24 03:32:27,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:32:27,313 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 208 transitions. [2019-11-24 03:32:27,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:32:27,314 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 208 transitions. [2019-11-24 03:32:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-24 03:32:27,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:32:27,315 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 03:32:27,316 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:32:27,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:32:27,316 INFO L82 PathProgramCache]: Analyzing trace with hash 832788527, now seen corresponding path program 1 times [2019-11-24 03:32:27,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:32:27,317 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894244171] [2019-11-24 03:32:27,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:32:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:27,475 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 03:32:27,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894244171] [2019-11-24 03:32:27,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:32:27,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 03:32:27,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76919269] [2019-11-24 03:32:27,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:32:27,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:32:27,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:32:27,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:32:27,483 INFO L87 Difference]: Start difference. First operand 124 states and 208 transitions. Second operand 3 states. [2019-11-24 03:32:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:32:27,527 INFO L93 Difference]: Finished difference Result 237 states and 395 transitions. [2019-11-24 03:32:27,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:32:27,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-24 03:32:27,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:32:27,531 INFO L225 Difference]: With dead ends: 237 [2019-11-24 03:32:27,531 INFO L226 Difference]: Without dead ends: 234 [2019-11-24 03:32:27,532 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 03:32:27,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-11-24 03:32:27,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2019-11-24 03:32:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-11-24 03:32:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 391 transitions. [2019-11-24 03:32:27,638 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 391 transitions. Word has length 23 [2019-11-24 03:32:27,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:32:27,641 INFO L462 AbstractCegarLoop]: Abstraction has 234 states and 391 transitions. [2019-11-24 03:32:27,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:32:27,644 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 391 transitions. [2019-11-24 03:32:27,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-24 03:32:27,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:32:27,646 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] [2019-11-24 03:32:27,646 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:32:27,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:32:27,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1619197865, now seen corresponding path program 1 times [2019-11-24 03:32:27,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:32:27,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98226199] [2019-11-24 03:32:27,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:32:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:27,765 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 03:32:27,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98226199] [2019-11-24 03:32:27,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:32:27,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:32:27,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675685913] [2019-11-24 03:32:27,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:32:27,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:32:27,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:32:27,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:32:27,767 INFO L87 Difference]: Start difference. First operand 234 states and 391 transitions. Second operand 3 states. [2019-11-24 03:32:29,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:32:29,458 INFO L93 Difference]: Finished difference Result 411 states and 680 transitions. [2019-11-24 03:32:29,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:32:29,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-24 03:32:29,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:32:29,461 INFO L225 Difference]: With dead ends: 411 [2019-11-24 03:32:29,461 INFO L226 Difference]: Without dead ends: 188 [2019-11-24 03:32:29,463 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 03:32:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-11-24 03:32:29,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2019-11-24 03:32:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-11-24 03:32:29,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 305 transitions. [2019-11-24 03:32:29,481 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 305 transitions. Word has length 32 [2019-11-24 03:32:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:32:29,481 INFO L462 AbstractCegarLoop]: Abstraction has 185 states and 305 transitions. [2019-11-24 03:32:29,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:32:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 305 transitions. [2019-11-24 03:32:29,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-24 03:32:29,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:32:29,484 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] [2019-11-24 03:32:29,485 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:32:29,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:32:29,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1007215894, now seen corresponding path program 1 times [2019-11-24 03:32:29,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:32:29,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137403329] [2019-11-24 03:32:29,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:32:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:32:30,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137403329] [2019-11-24 03:32:30,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886433622] [2019-11-24 03:32:30,227 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 03:32:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:32:30,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-24 03:32:30,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:32:30,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:32:30,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:32:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:32:30,989 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:32:31,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:32:31,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:32:31,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:32:31,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:32:31,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:32:31,137 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:32:31,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:32:31,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 03:32:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:32:31,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [986004980] [2019-11-24 03:32:31,313 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2019-11-24 03:32:31,313 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 03:32:31,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 03:32:31,339 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 03:32:31,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs