/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/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:17:11,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:17:11,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:17:11,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:17:11,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:17:11,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:17:11,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:17:11,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:17:11,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:17:11,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:17:11,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:17:11,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:17:11,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:17:11,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:17:11,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:17:11,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:17:11,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:17:11,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:17:11,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:17:11,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:17:11,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:17:11,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:17:11,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:17:11,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:17:11,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:17:11,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:17:11,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:17:11,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:17:11,822 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 04:17:11,837 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:17:11,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:17:11,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:17:11,838 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:17:11,839 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:17:11,839 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:17:11,839 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:17:11,839 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:17:11,839 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:17:11,840 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:17:11,840 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:17:11,840 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:17:11,840 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:17:11,840 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:17:11,841 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:17:11,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:17:11,842 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:17:11,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:17:11,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:17:11,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:17:11,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:17:11,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:17:11,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:17:11,843 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:17:11,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:17:11,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:17:11,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:17:11,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:17:11,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:17:11,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:17:11,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:17:11,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:17:11,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:17:11,845 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:17:11,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:17:11,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:17:11,846 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:17:11,846 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:17:12,108 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:17:12,126 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:17:12,133 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:17:12,134 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:17:12,135 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:17:12,135 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2019-11-24 04:17:12,209 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a822bd0d/9d7be25a17054be0b1553dd9080b5e1d/FLAG1b027eba9 [2019-11-24 04:17:12,793 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:17:12,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2019-11-24 04:17:12,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a822bd0d/9d7be25a17054be0b1553dd9080b5e1d/FLAG1b027eba9 [2019-11-24 04:17:13,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a822bd0d/9d7be25a17054be0b1553dd9080b5e1d [2019-11-24 04:17:13,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:17:13,132 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:17:13,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:17:13,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:17:13,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:17:13,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:17:13" (1/1) ... [2019-11-24 04:17:13,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b40b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:13, skipping insertion in model container [2019-11-24 04:17:13,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:17:13" (1/1) ... [2019-11-24 04:17:13,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:17:13,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:17:13,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:17:13,578 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:17:13,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:17:13,663 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:17:13,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:13 WrapperNode [2019-11-24 04:17:13,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:17:13,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:17:13,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:17:13,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:17:13,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:13" (1/1) ... [2019-11-24 04:17:13,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:13" (1/1) ... [2019-11-24 04:17:13,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:17:13,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:17:13,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:17:13,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:17:13,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:13" (1/1) ... [2019-11-24 04:17:13,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:13" (1/1) ... [2019-11-24 04:17:13,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:13" (1/1) ... [2019-11-24 04:17:13,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:13" (1/1) ... [2019-11-24 04:17:13,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:13" (1/1) ... [2019-11-24 04:17:13,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:13" (1/1) ... [2019-11-24 04:17:13,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:13" (1/1) ... [2019-11-24 04:17:13,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:17:13,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:17:13,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:17:13,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:17:13,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:13" (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 04:17:13,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:17:13,889 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2019-11-24 04:17:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:17:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:17:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:17:13,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:17:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:17:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:17:14,686 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:17:14,687 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-24 04:17:14,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:17:14 BoogieIcfgContainer [2019-11-24 04:17:14,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:17:14,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:17:14,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:17:14,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:17:14,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:17:13" (1/3) ... [2019-11-24 04:17:14,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@455311d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:17:14, skipping insertion in model container [2019-11-24 04:17:14,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:13" (2/3) ... [2019-11-24 04:17:14,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@455311d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:17:14, skipping insertion in model container [2019-11-24 04:17:14,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:17:14" (3/3) ... [2019-11-24 04:17:14,719 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2019-11-24 04:17:14,729 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:17:14,737 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:17:14,748 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:17:14,776 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:17:14,776 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:17:14,777 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:17:14,777 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:17:14,777 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:17:14,777 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:17:14,777 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:17:14,777 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:17:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-24 04:17:14,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:17:14,798 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:17:14,798 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:17:14,799 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:17:14,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:17:14,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1953555076, now seen corresponding path program 1 times [2019-11-24 04:17:14,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:17:14,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094120022] [2019-11-24 04:17:14,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:17:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:17:15,196 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 04:17:15,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094120022] [2019-11-24 04:17:15,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:17:15,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:17:15,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620259268] [2019-11-24 04:17:15,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:17:15,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:17:15,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:17:15,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:17:15,221 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 5 states. [2019-11-24 04:17:15,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:17:15,312 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-11-24 04:17:15,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 04:17:15,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-24 04:17:15,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:17:15,325 INFO L225 Difference]: With dead ends: 24 [2019-11-24 04:17:15,325 INFO L226 Difference]: Without dead ends: 14 [2019-11-24 04:17:15,329 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-24 04:17:15,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-24 04:17:15,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2019-11-24 04:17:15,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-24 04:17:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-24 04:17:15,362 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2019-11-24 04:17:15,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:17:15,363 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-24 04:17:15,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:17:15,363 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-24 04:17:15,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:17:15,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:17:15,364 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-24 04:17:15,364 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:17:15,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:17:15,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1000383431, now seen corresponding path program 1 times [2019-11-24 04:17:15,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:17:15,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773682120] [2019-11-24 04:17:15,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:17:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:17:15,580 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 04:17:15,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773682120] [2019-11-24 04:17:15,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474925486] [2019-11-24 04:17:15,581 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 04:17:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:17:15,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-24 04:17:15,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:17:15,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:17:15,807 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 04:17:15,807 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:17:15,860 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 04:17:15,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [209741217] [2019-11-24 04:17:15,886 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-24 04:17:15,886 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:17:15,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:17:15,900 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:17:15,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:17:34,614 WARN L192 SmtUtils]: Spent 546.00 ms on a formula simplification that was a NOOP. DAG size: 937 [2019-11-24 04:17:49,776 WARN L192 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 976 [2019-11-24 04:17:50,510 WARN L192 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 1003 [2019-11-24 04:17:51,132 WARN L192 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 1000 [2019-11-24 04:17:51,782 WARN L192 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 1047 [2019-11-24 04:17:53,306 WARN L192 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 1088 [2019-11-24 04:17:54,452 WARN L192 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1149 DAG size of output: 1149 [2019-11-24 04:17:57,684 WARN L192 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 1149 DAG size of output: 1149 [2019-11-24 04:17:59,368 WARN L192 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 1218 DAG size of output: 1218 [2019-11-24 04:18:08,154 WARN L192 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 1219 DAG size of output: 1218 [2019-11-24 04:18:10,791 WARN L192 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 1278 DAG size of output: 1276 [2019-11-24 04:18:25,814 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6898 conjuctions. This might take some time... [2019-11-24 04:18:51,503 WARN L192 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 1277 DAG size of output: 1277