/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-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:13:38,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:13:38,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:13:38,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:13:38,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:13:38,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:13:38,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:13:38,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:13:38,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:13:38,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:13:38,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:13:38,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:13:38,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:13:38,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:13:38,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:13:38,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:13:38,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:13:38,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:13:38,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:13:38,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:13:38,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:13:38,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:13:38,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:13:38,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:13:38,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:13:38,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:13:38,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:13:38,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:13:38,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:13:38,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:13:38,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:13:38,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:13:38,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:13:38,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:13:38,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:13:38,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:13:38,837 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 04:13:38,876 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:13:38,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:13:38,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:13:38,877 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:13:38,877 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:13:38,882 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:13:38,882 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:13:38,882 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:13:38,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:13:38,883 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:13:38,883 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:13:38,883 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:13:38,883 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:13:38,884 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:13:38,884 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:13:38,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:13:38,886 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:13:38,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:13:38,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:13:38,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:13:38,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:13:38,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:13:38,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:13:38,888 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:13:38,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:13:38,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:13:38,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:13:38,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:13:38,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:13:38,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:13:38,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:13:38,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:13:38,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:13:38,890 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:13:38,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:13:38,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:13:38,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:13:38,891 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:13:39,177 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:13:39,197 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:13:39,201 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:13:39,202 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:13:39,202 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:13:39,203 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2019-11-24 04:13:39,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9e0094e/d6c3b3d4ebc64c7b98c76d7904b5d502/FLAGa85c01095 [2019-11-24 04:13:39,699 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:13:39,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2019-11-24 04:13:39,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9e0094e/d6c3b3d4ebc64c7b98c76d7904b5d502/FLAGa85c01095 [2019-11-24 04:13:40,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9e0094e/d6c3b3d4ebc64c7b98c76d7904b5d502 [2019-11-24 04:13:40,094 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:13:40,095 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:13:40,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:13:40,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:13:40,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:13:40,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:13:40" (1/1) ... [2019-11-24 04:13:40,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1241334f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:40, skipping insertion in model container [2019-11-24 04:13:40,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:13:40" (1/1) ... [2019-11-24 04:13:40,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:13:40,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:13:40,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:13:40,315 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:13:40,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:13:40,353 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:13:40,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:40 WrapperNode [2019-11-24 04:13:40,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:13:40,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:13:40,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:13:40,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:13:40,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:40" (1/1) ... [2019-11-24 04:13:40,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:40" (1/1) ... [2019-11-24 04:13:40,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:13:40,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:13:40,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:13:40,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:13:40,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:40" (1/1) ... [2019-11-24 04:13:40,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:40" (1/1) ... [2019-11-24 04:13:40,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:40" (1/1) ... [2019-11-24 04:13:40,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:40" (1/1) ... [2019-11-24 04:13:40,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:40" (1/1) ... [2019-11-24 04:13:40,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:40" (1/1) ... [2019-11-24 04:13:40,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:40" (1/1) ... [2019-11-24 04:13:40,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:13:40,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:13:40,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:13:40,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:13:40,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:40" (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 04:13:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:13:40,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:13:40,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:13:40,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:13:40,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:13:40,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:13:40,815 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:13:40,815 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 04:13:40,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:13:40 BoogieIcfgContainer [2019-11-24 04:13:40,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:13:40,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:13:40,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:13:40,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:13:40,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:13:40" (1/3) ... [2019-11-24 04:13:40,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7822325e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:13:40, skipping insertion in model container [2019-11-24 04:13:40,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:40" (2/3) ... [2019-11-24 04:13:40,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7822325e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:13:40, skipping insertion in model container [2019-11-24 04:13:40,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:13:40" (3/3) ... [2019-11-24 04:13:40,828 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2019-11-24 04:13:40,845 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:13:40,854 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:13:40,880 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:13:40,902 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:13:40,902 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:13:40,902 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:13:40,902 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:13:40,902 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:13:40,902 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:13:40,902 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:13:40,902 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:13:40,914 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-11-24 04:13:40,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 04:13:40,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:13:40,920 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 04:13:40,921 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:13:40,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:13:40,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1882248, now seen corresponding path program 1 times [2019-11-24 04:13:40,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:13:40,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97205942] [2019-11-24 04:13:40,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:13:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:41,107 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 04:13:41,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97205942] [2019-11-24 04:13:41,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:13:41,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:13:41,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720971035] [2019-11-24 04:13:41,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:13:41,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:13:41,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:13:41,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:13:41,134 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-11-24 04:13:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:13:41,166 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-11-24 04:13:41,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:13:41,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-24 04:13:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:13:41,190 INFO L225 Difference]: With dead ends: 13 [2019-11-24 04:13:41,191 INFO L226 Difference]: Without dead ends: 6 [2019-11-24 04:13:41,195 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:13:41,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-11-24 04:13:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-11-24 04:13:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-24 04:13:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-11-24 04:13:41,228 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-11-24 04:13:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:13:41,229 INFO L462 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-11-24 04:13:41,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:13:41,229 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-11-24 04:13:41,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:13:41,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:13:41,230 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:13:41,231 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:13:41,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:13:41,231 INFO L82 PathProgramCache]: Analyzing trace with hash 58276611, now seen corresponding path program 1 times [2019-11-24 04:13:41,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:13:41,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625846777] [2019-11-24 04:13:41,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:13:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:13:41,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625846777] [2019-11-24 04:13:41,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100696900] [2019-11-24 04:13:41,292 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 04:13:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:41,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:13:41,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:13:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:13:41,371 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:13:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:13:41,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [89811424] [2019-11-24 04:13:41,423 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-24 04:13:41,423 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:13:41,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:13:41,437 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:13:41,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:13:58,410 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 210 [2019-11-24 04:14:46,266 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 328 [2019-11-24 04:15:00,053 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 351 [2019-11-24 04:15:02,657 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 355 [2019-11-24 04:15:05,281 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2019-11-24 04:15:05,400 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 360 [2019-11-24 04:15:07,866 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 364 [2019-11-24 04:15:07,983 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 363 [2019-11-24 04:15:10,625 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 368 [2019-11-24 04:15:10,740 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 366