/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/minepump_spec4_product50.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:29:26,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:29:26,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:29:26,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:29:26,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:29:26,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:29:26,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:29:26,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:29:26,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:29:26,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:29:26,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:29:26,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:29:26,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:29:26,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:29:26,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:29:26,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:29:26,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:29:26,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:29:26,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:29:26,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:29:26,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:29:26,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:29:26,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:29:26,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:29:26,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:29:26,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:29:26,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:29:26,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:29:26,893 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 05:29:26,909 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:29:26,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:29:26,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:29:26,910 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:29:26,910 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:29:26,911 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:29:26,911 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:29:26,911 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:29:26,911 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:29:26,912 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:29:26,912 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:29:26,912 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:29:26,912 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:29:26,913 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:29:26,913 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:29:26,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:29:26,914 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:29:26,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:29:26,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:29:26,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:29:26,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:29:26,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:29:26,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:29:26,915 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:29:26,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:29:26,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:29:26,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:29:26,916 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:29:26,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:29:26,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:29:26,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:29:26,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:29:26,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:29:26,918 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:29:26,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:29:26,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:29:26,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:29:26,919 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:29:27,192 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:29:27,205 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:29:27,209 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:29:27,210 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:29:27,211 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:29:27,211 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product50.cil.c [2019-11-24 05:29:27,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fe4ebf1f/16e92522bb8b449eae5e3d8d2ac9ecfa/FLAGccb1ea1d5 [2019-11-24 05:29:27,743 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:29:27,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product50.cil.c [2019-11-24 05:29:27,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fe4ebf1f/16e92522bb8b449eae5e3d8d2ac9ecfa/FLAGccb1ea1d5 [2019-11-24 05:29:27,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fe4ebf1f/16e92522bb8b449eae5e3d8d2ac9ecfa [2019-11-24 05:29:27,794 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:29:27,795 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:29:27,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:29:27,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:29:27,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:29:27,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:29:27" (1/1) ... [2019-11-24 05:29:27,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2722d55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:29:27, skipping insertion in model container [2019-11-24 05:29:27,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:29:27" (1/1) ... [2019-11-24 05:29:27,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:29:27,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:29:28,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:29:28,351 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:29:28,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:29:28,480 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:29:28,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:29:28 WrapperNode [2019-11-24 05:29:28,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:29:28,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:29:28,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:29:28,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:29:28,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:29:28" (1/1) ... [2019-11-24 05:29:28,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:29:28" (1/1) ... [2019-11-24 05:29:28,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:29:28,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:29:28,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:29:28,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:29:28,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:29:28" (1/1) ... [2019-11-24 05:29:28,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:29:28" (1/1) ... [2019-11-24 05:29:28,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:29:28" (1/1) ... [2019-11-24 05:29:28,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:29:28" (1/1) ... [2019-11-24 05:29:28,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:29:28" (1/1) ... [2019-11-24 05:29:28,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:29:28" (1/1) ... [2019-11-24 05:29:28,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:29:28" (1/1) ... [2019-11-24 05:29:28,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:29:28,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:29:28,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:29:28,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:29:28,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:29:28" (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 05:29:28,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:29:28,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:29:28,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:29:28,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:29:31,070 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:29:31,070 INFO L284 CfgBuilder]: Removed 158 assume(true) statements. [2019-11-24 05:29:31,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:29:31 BoogieIcfgContainer [2019-11-24 05:29:31,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:29:31,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:29:31,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:29:31,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:29:31,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:29:27" (1/3) ... [2019-11-24 05:29:31,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adceabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:29:31, skipping insertion in model container [2019-11-24 05:29:31,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:29:28" (2/3) ... [2019-11-24 05:29:31,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adceabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:29:31, skipping insertion in model container [2019-11-24 05:29:31,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:29:31" (3/3) ... [2019-11-24 05:29:31,087 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product50.cil.c [2019-11-24 05:29:31,098 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:29:31,106 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-24 05:29:31,121 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-24 05:29:31,153 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:29:31,153 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:29:31,153 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:29:31,154 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:29:31,154 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:29:31,154 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:29:31,154 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:29:31,155 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:29:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-24 05:29:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:29:31,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:29:31,181 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:29:31,181 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:29:31,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:29:31,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1289940716, now seen corresponding path program 1 times [2019-11-24 05:29:31,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:29:31,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005179238] [2019-11-24 05:29:31,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:29:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:29:31,660 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 05:29:31,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005179238] [2019-11-24 05:29:31,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:29:31,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:29:31,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036814760] [2019-11-24 05:29:31,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:29:31,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:29:31,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:29:31,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 05:29:31,687 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2019-11-24 05:29:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:29:31,796 INFO L93 Difference]: Finished difference Result 67 states and 94 transitions. [2019-11-24 05:29:31,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 05:29:31,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-24 05:29:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:29:31,809 INFO L225 Difference]: With dead ends: 67 [2019-11-24 05:29:31,810 INFO L226 Difference]: Without dead ends: 31 [2019-11-24 05:29:31,814 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 05:29:31,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-24 05:29:31,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2019-11-24 05:29:31,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-24 05:29:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-24 05:29:31,856 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2019-11-24 05:29:31,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:29:31,857 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-24 05:29:31,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:29:31,857 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-24 05:29:31,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 05:29:31,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:29:31,858 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-24 05:29:31,859 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:29:31,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:29:31,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2146055754, now seen corresponding path program 1 times [2019-11-24 05:29:31,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:29:31,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564184921] [2019-11-24 05:29:31,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:29:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:29:32,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:29:32,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564184921] [2019-11-24 05:29:32,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365368573] [2019-11-24 05:29:32,096 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 05:29:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:29:32,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-24 05:29:32,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:29:32,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,484 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:29:32,582 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:29:32,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 05:29:32,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,733 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 05:29:32,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:29:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:29:32,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [27933082] [2019-11-24 05:29:32,803 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-24 05:29:32,803 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:29:32,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:29:32,815 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:29:32,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:29:42,987 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 476 [2019-11-24 05:29:44,769 WARN L192 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-11-24 05:29:44,935 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 484 [2019-11-24 05:29:45,456 WARN L192 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 578 [2019-11-24 05:29:46,388 WARN L192 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 678 [2019-11-24 05:29:47,719 WARN L192 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 787 DAG size of output: 785 [2019-11-24 05:29:56,344 WARN L192 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 784 [2019-11-24 05:30:01,664 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 05:30:06,140 WARN L192 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 484 DAG size of output: 429 [2019-11-24 05:30:24,981 WARN L192 SmtUtils]: Spent 18.52 s on a formula simplification. DAG size of input: 778 DAG size of output: 574