/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/product-lines/email_spec3_product28.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:00:39,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:00:39,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:00:39,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:00:39,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:00:39,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:00:39,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:00:39,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:00:39,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:00:39,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:00:39,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:00:39,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:00:39,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:00:39,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:00:39,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:00:39,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:00:39,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:00:39,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:00:39,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:00:39,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:00:39,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:00:39,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:00:39,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:00:39,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:00:39,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:00:39,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:00:39,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:00:39,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:00:39,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:00:39,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:00:39,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:00:39,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:00:39,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:00:39,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:00:39,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:00:39,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:00:39,596 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 05:00:39,615 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:00:39,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:00:39,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:00:39,616 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:00:39,617 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:00:39,617 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:00:39,617 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:00:39,617 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:00:39,617 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:00:39,618 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:00:39,619 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:00:39,619 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:00:39,619 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:00:39,620 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:00:39,620 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:00:39,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:00:39,622 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:00:39,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:00:39,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:00:39,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:00:39,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:00:39,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:00:39,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:00:39,623 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:00:39,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:00:39,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:00:39,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:00:39,624 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:00:39,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:00:39,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:00:39,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:00:39,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:00:39,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:00:39,626 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:00:39,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:00:39,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:00:39,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:00:39,627 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:00:39,912 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:00:39,925 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:00:39,929 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:00:39,930 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:00:39,931 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:00:39,931 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec3_product28.cil.c [2019-11-24 05:00:40,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/205efde82/192fafd1644a49bc9b63c4ec198f64e6/FLAG77980c355 [2019-11-24 05:00:40,602 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:00:40,603 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec3_product28.cil.c [2019-11-24 05:00:40,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/205efde82/192fafd1644a49bc9b63c4ec198f64e6/FLAG77980c355 [2019-11-24 05:00:40,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/205efde82/192fafd1644a49bc9b63c4ec198f64e6 [2019-11-24 05:00:40,855 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:00:40,858 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:00:40,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:00:40,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:00:40,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:00:40,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:00:40" (1/1) ... [2019-11-24 05:00:40,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10cda93e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:00:40, skipping insertion in model container [2019-11-24 05:00:40,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:00:40" (1/1) ... [2019-11-24 05:00:40,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:00:40,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:00:41,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:00:41,797 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:00:41,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:00:42,007 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:00:42,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:00:42 WrapperNode [2019-11-24 05:00:42,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:00:42,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:00:42,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:00:42,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:00:42,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:00:42" (1/1) ... [2019-11-24 05:00:42,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:00:42" (1/1) ... [2019-11-24 05:00:42,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:00:42,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:00:42,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:00:42,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:00:42,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:00:42" (1/1) ... [2019-11-24 05:00:42,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:00:42" (1/1) ... [2019-11-24 05:00:42,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:00:42" (1/1) ... [2019-11-24 05:00:42,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:00:42" (1/1) ... [2019-11-24 05:00:42,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:00:42" (1/1) ... [2019-11-24 05:00:42,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:00:42" (1/1) ... [2019-11-24 05:00:42,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:00:42" (1/1) ... [2019-11-24 05:00:42,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:00:42,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:00:42,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:00:42,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:00:42,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:00:42" (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 05:00:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:00:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:00:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:00:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:00:42,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:00:50,361 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:00:50,362 INFO L284 CfgBuilder]: Removed 311 assume(true) statements. [2019-11-24 05:00:50,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:00:50 BoogieIcfgContainer [2019-11-24 05:00:50,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:00:50,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:00:50,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:00:50,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:00:50,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:00:40" (1/3) ... [2019-11-24 05:00:50,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@319331d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:00:50, skipping insertion in model container [2019-11-24 05:00:50,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:00:42" (2/3) ... [2019-11-24 05:00:50,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@319331d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:00:50, skipping insertion in model container [2019-11-24 05:00:50,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:00:50" (3/3) ... [2019-11-24 05:00:50,372 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec3_product28.cil.c [2019-11-24 05:00:50,382 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:00:50,390 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-24 05:00:50,401 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-24 05:00:50,426 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:00:50,426 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:00:50,426 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:00:50,426 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:00:50,426 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:00:50,426 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:00:50,427 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:00:50,427 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:00:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2019-11-24 05:00:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:00:50,448 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:00:50,449 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:00:50,450 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:00:50,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:00:50,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2086013023, now seen corresponding path program 1 times [2019-11-24 05:00:50,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:00:50,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294737104] [2019-11-24 05:00:50,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:00:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:00:50,801 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 05:00:50,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294737104] [2019-11-24 05:00:50,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:00:50,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:00:50,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047735804] [2019-11-24 05:00:50,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:00:50,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:00:50,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:00:50,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:00:50,822 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2019-11-24 05:00:50,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:00:50,844 INFO L93 Difference]: Finished difference Result 66 states and 103 transitions. [2019-11-24 05:00:50,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:00:50,846 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 05:00:50,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:00:50,857 INFO L225 Difference]: With dead ends: 66 [2019-11-24 05:00:50,857 INFO L226 Difference]: Without dead ends: 43 [2019-11-24 05:00:50,860 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:00:50,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-24 05:00:50,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-24 05:00:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-24 05:00:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 66 transitions. [2019-11-24 05:00:50,897 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 66 transitions. Word has length 7 [2019-11-24 05:00:50,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:00:50,898 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 66 transitions. [2019-11-24 05:00:50,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:00:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 66 transitions. [2019-11-24 05:00:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:00:50,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:00:50,899 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:00:50,899 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:00:50,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:00:50,900 INFO L82 PathProgramCache]: Analyzing trace with hash 420409205, now seen corresponding path program 1 times [2019-11-24 05:00:50,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:00:50,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288560337] [2019-11-24 05:00:50,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:00:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:00:51,048 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 05:00:51,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288560337] [2019-11-24 05:00:51,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:00:51,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:00:51,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947266562] [2019-11-24 05:00:51,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:00:51,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:00:51,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:00:51,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:00:51,054 INFO L87 Difference]: Start difference. First operand 43 states and 66 transitions. Second operand 3 states. [2019-11-24 05:00:51,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:00:51,080 INFO L93 Difference]: Finished difference Result 62 states and 86 transitions. [2019-11-24 05:00:51,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:00:51,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:00:51,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:00:51,083 INFO L225 Difference]: With dead ends: 62 [2019-11-24 05:00:51,083 INFO L226 Difference]: Without dead ends: 45 [2019-11-24 05:00:51,084 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 05:00:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-24 05:00:51,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-11-24 05:00:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-24 05:00:51,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 68 transitions. [2019-11-24 05:00:51,093 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 68 transitions. Word has length 8 [2019-11-24 05:00:51,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:00:51,094 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 68 transitions. [2019-11-24 05:00:51,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:00:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 68 transitions. [2019-11-24 05:00:51,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:00:51,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:00:51,095 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:00:51,095 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:00:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:00:51,096 INFO L82 PathProgramCache]: Analyzing trace with hash -281692220, now seen corresponding path program 1 times [2019-11-24 05:00:51,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:00:51,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467807258] [2019-11-24 05:00:51,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:00:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:00:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:00:51,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467807258] [2019-11-24 05:00:51,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786791017] [2019-11-24 05:00:51,379 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 05:00:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:00:51,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:00:51,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:00:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:00:51,781 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:00:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:00:51,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [213324166] [2019-11-24 05:00:51,884 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-24 05:00:51,884 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:00:51,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:00:51,901 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:00:51,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:01:56,327 WARN L192 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 712 [2019-11-24 05:02:00,624 WARN L192 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 341 DAG size of output: 277 [2019-11-24 05:02:01,063 WARN L192 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 760 [2019-11-24 05:02:01,288 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8