/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:59:46,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:59:46,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:59:46,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:59:46,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:59:46,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:59:46,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:59:46,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:59:46,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:59:46,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:59:46,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:59:46,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:59:46,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:59:46,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:59:46,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:59:46,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:59:46,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:59:46,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:59:46,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:59:46,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:59:46,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:59:46,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:59:46,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:59:46,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:59:46,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:59:46,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:59:46,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:59:46,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:59:46,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:59:46,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:59:46,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:59:46,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:59:46,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:59:46,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:59:46,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:59:46,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:59:46,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-23 22:59:46,993 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:59:46,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:59:46,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:59:46,998 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:59:46,998 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:59:46,998 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:59:46,998 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:59:46,998 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:59:46,999 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:59:46,999 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:59:46,999 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:59:46,999 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:59:46,999 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:59:47,000 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:59:47,000 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:59:47,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:59:47,003 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:59:47,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:59:47,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:59:47,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:59:47,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:59:47,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:59:47,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:59:47,004 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:59:47,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:59:47,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:59:47,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:59:47,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:59:47,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:59:47,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:59:47,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:59:47,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:59:47,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:59:47,007 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:59:47,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:59:47,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:59:47,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:59:47,008 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:59:47,331 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:59:47,345 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:59:47,349 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:59:47,350 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:59:47,351 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:59:47,352 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2019-11-23 22:59:47,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4150b6088/e2c0371c33a645a0aef7968828911e8f/FLAG2b0b17be5 [2019-11-23 22:59:47,851 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:59:47,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2019-11-23 22:59:47,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4150b6088/e2c0371c33a645a0aef7968828911e8f/FLAG2b0b17be5 [2019-11-23 22:59:48,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4150b6088/e2c0371c33a645a0aef7968828911e8f [2019-11-23 22:59:48,277 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:59:48,279 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:59:48,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:59:48,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:59:48,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:59:48,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:59:48" (1/1) ... [2019-11-23 22:59:48,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f20484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:48, skipping insertion in model container [2019-11-23 22:59:48,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:59:48" (1/1) ... [2019-11-23 22:59:48,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:59:48,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:59:48,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:59:48,594 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:59:48,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:59:48,728 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:59:48,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:48 WrapperNode [2019-11-23 22:59:48,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:59:48,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:59:48,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:59:48,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:59:48,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:48" (1/1) ... [2019-11-23 22:59:48,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:48" (1/1) ... [2019-11-23 22:59:48,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:59:48,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:59:48,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:59:48,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:59:48,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:48" (1/1) ... [2019-11-23 22:59:48,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:48" (1/1) ... [2019-11-23 22:59:48,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:48" (1/1) ... [2019-11-23 22:59:48,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:48" (1/1) ... [2019-11-23 22:59:48,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:48" (1/1) ... [2019-11-23 22:59:48,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:48" (1/1) ... [2019-11-23 22:59:48,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:48" (1/1) ... [2019-11-23 22:59:48,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:59:48,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:59:48,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:59:48,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:59:48,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:59:48,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:59:48,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:59:48,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:59:48,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:59:48,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:59:48,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:59:49,558 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:59:49,558 INFO L284 CfgBuilder]: Removed 24 assume(true) statements. [2019-11-23 22:59:49,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:59:49 BoogieIcfgContainer [2019-11-23 22:59:49,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:59:49,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:59:49,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:59:49,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:59:49,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:59:48" (1/3) ... [2019-11-23 22:59:49,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a4dc409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:59:49, skipping insertion in model container [2019-11-23 22:59:49,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:48" (2/3) ... [2019-11-23 22:59:49,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a4dc409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:59:49, skipping insertion in model container [2019-11-23 22:59:49,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:59:49" (3/3) ... [2019-11-23 22:59:49,568 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2019-11-23 22:59:49,579 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:59:49,587 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-23 22:59:49,598 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-23 22:59:49,619 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:59:49,619 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:59:49,619 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:59:49,619 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:59:49,620 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:59:49,620 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:59:49,620 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:59:49,620 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:59:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-23 22:59:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 22:59:49,640 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:49,641 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 22:59:49,641 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:49,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:49,647 INFO L82 PathProgramCache]: Analyzing trace with hash 2054062916, now seen corresponding path program 1 times [2019-11-23 22:59:49,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:49,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327356500] [2019-11-23 22:59:49,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:59:49,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327356500] [2019-11-23 22:59:49,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:59:49,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:59:49,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995968136] [2019-11-23 22:59:49,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:59:49,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:59:49,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:59:49,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:59:49,814 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-11-23 22:59:49,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:59:49,919 INFO L93 Difference]: Finished difference Result 75 states and 113 transitions. [2019-11-23 22:59:49,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:59:49,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 22:59:49,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:59:49,931 INFO L225 Difference]: With dead ends: 75 [2019-11-23 22:59:49,931 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 22:59:49,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:59:49,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 22:59:49,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 26. [2019-11-23 22:59:49,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:59:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-11-23 22:59:49,976 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 6 [2019-11-23 22:59:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:59:49,977 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-11-23 22:59:49,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:59:49,977 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-11-23 22:59:49,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:59:49,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:49,978 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:59:49,978 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:49,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:49,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1036015311, now seen corresponding path program 1 times [2019-11-23 22:59:49,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:49,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69551165] [2019-11-23 22:59:49,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:59:50,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69551165] [2019-11-23 22:59:50,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454759007] [2019-11-23 22:59:50,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:59:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:50,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:59:50,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:59:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:59:50,107 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:59:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:59:50,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1611801903] [2019-11-23 22:59:50,176 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 22:59:50,176 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:59:50,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:59:50,214 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:59:50,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:00:17,931 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 244 [2019-11-23 23:00:18,066 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 243 [2019-11-23 23:00:45,613 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 300 [2019-11-23 23:00:52,521 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 317 [2019-11-23 23:00:55,053 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 319 [2019-11-23 23:01:00,301 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 327 [2019-11-23 23:01:00,747 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 331 [2019-11-23 23:01:03,165 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 343 [2019-11-23 23:01:03,292 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 337 [2019-11-23 23:01:03,550 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 338 [2019-11-23 23:01:03,773 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 340 [2019-11-23 23:01:03,996 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 343 [2019-11-23 23:01:06,583 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 347 [2019-11-23 23:01:09,017 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 355 [2019-11-23 23:01:09,136 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 351 [2019-11-23 23:01:11,789 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2019-11-23 23:01:11,918 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 354 [2019-11-23 23:01:14,589 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2019-11-23 23:01:14,712 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 356 [2019-11-23 23:01:17,640 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 360 [2019-11-23 23:01:20,373 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-11-23 23:01:20,491 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 364