/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:02:50,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:02:50,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:02:50,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:02:50,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:02:50,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:02:50,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:02:50,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:02:50,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:02:50,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:02:50,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:02:50,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:02:50,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:02:50,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:02:50,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:02:50,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:02:50,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:02:50,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:02:50,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:02:50,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:02:50,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:02:50,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:02:50,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:02:50,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:02:50,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:02:50,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:02:50,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:02:50,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:02:50,765 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-23 23:02:50,786 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:02:50,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:02:50,788 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:02:50,788 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:02:50,788 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:02:50,789 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:02:50,789 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:02:50,789 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:02:50,789 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:02:50,789 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:02:50,790 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:02:50,791 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:02:50,791 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:02:50,791 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:02:50,791 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:02:50,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:02:50,793 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:02:50,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:02:50,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:02:50,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:02:50,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:02:50,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:02:50,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:02:50,794 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:02:50,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:02:50,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:02:50,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:02:50,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:02:50,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:02:50,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:02:50,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:02:50,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:02:50,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:02:50,797 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:02:50,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:02:50,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:02:50,798 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:02:50,799 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:02:51,092 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:02:51,115 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:02:51,119 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:02:51,120 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:02:51,121 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:02:51,122 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-11-23 23:02:51,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d740f3c04/fdec100179b34aa38ab2fa5e7eaea815/FLAG62ece1128 [2019-11-23 23:02:51,638 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:02:51,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-11-23 23:02:51,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d740f3c04/fdec100179b34aa38ab2fa5e7eaea815/FLAG62ece1128 [2019-11-23 23:02:52,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d740f3c04/fdec100179b34aa38ab2fa5e7eaea815 [2019-11-23 23:02:52,036 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:02:52,037 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:02:52,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:02:52,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:02:52,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:02:52,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:02:52" (1/1) ... [2019-11-23 23:02:52,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b68018e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:52, skipping insertion in model container [2019-11-23 23:02:52,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:02:52" (1/1) ... [2019-11-23 23:02:52,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:02:52,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:02:52,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:02:52,301 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:02:52,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:02:52,345 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:02:52,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:52 WrapperNode [2019-11-23 23:02:52,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:02:52,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:02:52,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:02:52,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:02:52,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:52" (1/1) ... [2019-11-23 23:02:52,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:52" (1/1) ... [2019-11-23 23:02:52,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:02:52,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:02:52,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:02:52,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:02:52,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:52" (1/1) ... [2019-11-23 23:02:52,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:52" (1/1) ... [2019-11-23 23:02:52,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:52" (1/1) ... [2019-11-23 23:02:52,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:52" (1/1) ... [2019-11-23 23:02:52,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:52" (1/1) ... [2019-11-23 23:02:52,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:52" (1/1) ... [2019-11-23 23:02:52,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:52" (1/1) ... [2019-11-23 23:02:52,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:02:52,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:02:52,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:02:52,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:02:52,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:02:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:02:52,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:02:52,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:02:52,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:02:52,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:02:52,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:02:52,962 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:02:52,963 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 23:02:52,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:02:52 BoogieIcfgContainer [2019-11-23 23:02:52,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:02:52,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:02:52,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:02:52,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:02:52,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:02:52" (1/3) ... [2019-11-23 23:02:52,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565e94a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:02:52, skipping insertion in model container [2019-11-23 23:02:52,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:52" (2/3) ... [2019-11-23 23:02:52,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565e94a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:02:52, skipping insertion in model container [2019-11-23 23:02:52,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:02:52" (3/3) ... [2019-11-23 23:02:52,975 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2019-11-23 23:02:52,990 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:02:53,000 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:02:53,012 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:02:53,035 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:02:53,036 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:02:53,036 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:02:53,036 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:02:53,036 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:02:53,036 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:02:53,036 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:02:53,036 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:02:53,047 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-11-23 23:02:53,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:02:53,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:02:53,053 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:02:53,053 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:02:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:02:53,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1412201657, now seen corresponding path program 1 times [2019-11-23 23:02:53,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:02:53,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632653659] [2019-11-23 23:02:53,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:02:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:02:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:02:53,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632653659] [2019-11-23 23:02:53,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:02:53,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:02:53,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453166285] [2019-11-23 23:02:53,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:02:53,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:02:53,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:02:53,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:02:53,241 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2019-11-23 23:02:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:02:53,282 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2019-11-23 23:02:53,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:02:53,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 23:02:53,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:02:53,293 INFO L225 Difference]: With dead ends: 25 [2019-11-23 23:02:53,294 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:02:53,297 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:02:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:02:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:02:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:02:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-11-23 23:02:53,332 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2019-11-23 23:02:53,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:02:53,332 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-23 23:02:53,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:02:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2019-11-23 23:02:53,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 23:02:53,333 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:02:53,333 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:02:53,334 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:02:53,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:02:53,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1200147840, now seen corresponding path program 1 times [2019-11-23 23:02:53,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:02:53,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901422889] [2019-11-23 23:02:53,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:02:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:02:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:02:53,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901422889] [2019-11-23 23:02:53,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:02:53,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 23:02:53,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959647480] [2019-11-23 23:02:53,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:02:53,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:02:53,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:02:53,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:02:53,420 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 4 states. [2019-11-23 23:02:53,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:02:53,493 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2019-11-23 23:02:53,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:02:53,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 23:02:53,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:02:53,495 INFO L225 Difference]: With dead ends: 21 [2019-11-23 23:02:53,495 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 23:02:53,496 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:02:53,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 23:02:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-11-23 23:02:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 23:02:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2019-11-23 23:02:53,506 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 9 [2019-11-23 23:02:53,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:02:53,507 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2019-11-23 23:02:53,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:02:53,507 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2019-11-23 23:02:53,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 23:02:53,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:02:53,509 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:02:53,509 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:02:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:02:53,511 INFO L82 PathProgramCache]: Analyzing trace with hash 398690835, now seen corresponding path program 1 times [2019-11-23 23:02:53,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:02:53,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105364544] [2019-11-23 23:02:53,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:02:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:02:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:02:53,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105364544] [2019-11-23 23:02:53,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:02:53,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 23:02:53,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86257399] [2019-11-23 23:02:53,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:02:53,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:02:53,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:02:53,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:02:53,625 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 4 states. [2019-11-23 23:02:53,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:02:53,688 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2019-11-23 23:02:53,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:02:53,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-23 23:02:53,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:02:53,689 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:02:53,690 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 23:02:53,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:02:53,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 23:02:53,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2019-11-23 23:02:53,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 23:02:53,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2019-11-23 23:02:53,695 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2019-11-23 23:02:53,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:02:53,696 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2019-11-23 23:02:53,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:02:53,696 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2019-11-23 23:02:53,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 23:02:53,696 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:02:53,697 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:02:53,697 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:02:53,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:02:53,697 INFO L82 PathProgramCache]: Analyzing trace with hash -740741326, now seen corresponding path program 1 times [2019-11-23 23:02:53,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:02:53,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894785784] [2019-11-23 23:02:53,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:02:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:02:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:02:53,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894785784] [2019-11-23 23:02:53,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674425355] [2019-11-23 23:02:53,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:02:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:02:53,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:02:53,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:02:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:02:53,891 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:02:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:02:53,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [988029620] [2019-11-23 23:02:53,978 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-23 23:02:53,978 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:02:53,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:02:53,997 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:02:53,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:03:22,374 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 246 [2019-11-23 23:03:22,570 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 247 [2019-11-23 23:03:26,218 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 253 [2019-11-23 23:03:29,813 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 261 [2019-11-23 23:03:29,993 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 260 [2019-11-23 23:03:30,197 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2019-11-23 23:03:30,374 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 261 [2019-11-23 23:03:30,505 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2019-11-23 23:03:53,627 WARN L192 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2019-11-23 23:03:53,834 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 306 [2019-11-23 23:03:54,045 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 309 [2019-11-23 23:03:58,521 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 322 [2019-11-23 23:03:58,634 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 317 [2019-11-23 23:04:00,924 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 322 [2019-11-23 23:04:01,158 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 320 [2019-11-23 23:04:03,918 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2019-11-23 23:04:04,039 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 323 [2019-11-23 23:04:06,943 WARN L192 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-23 23:04:07,214 WARN L192 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 326 [2019-11-23 23:04:09,776 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 334 [2019-11-23 23:04:09,899 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 329 [2019-11-23 23:04:10,045 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2019-11-23 23:04:10,175 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 330 [2019-11-23 23:04:10,299 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2019-11-23 23:04:10,415 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 332 [2019-11-23 23:04:10,643 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 336 [2019-11-23 23:04:13,259 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2019-11-23 23:04:13,388 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 340 [2019-11-23 23:04:15,989 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2019-11-23 23:04:16,118 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 344 [2019-11-23 23:04:18,924 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-23 23:04:19,052 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 349