/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/reducercommutativity/sep60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:44:07,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:44:07,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:44:07,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:44:07,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:44:07,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:44:07,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:44:07,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:44:07,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:44:07,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:44:07,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:44:07,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:44:07,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:44:07,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:44:07,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:44:07,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:44:07,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:44:07,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:44:07,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:44:07,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:44:07,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:44:07,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:44:07,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:44:07,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:44:07,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:44:07,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:44:07,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:44:07,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:44:07,490 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 05:44:07,526 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:44:07,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:44:07,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:44:07,527 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:44:07,527 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:44:07,527 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:44:07,527 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:44:07,528 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:44:07,528 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:44:07,528 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:44:07,528 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:44:07,528 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:44:07,529 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:44:07,529 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:44:07,529 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:44:07,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:44:07,530 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:44:07,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:44:07,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:44:07,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:44:07,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:44:07,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:44:07,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:44:07,531 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:44:07,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:44:07,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:44:07,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:44:07,532 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:44:07,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:44:07,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:44:07,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:44:07,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:44:07,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:44:07,533 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:44:07,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:44:07,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:44:07,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:44:07,534 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:44:07,841 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:44:07,855 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:44:07,860 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:44:07,862 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:44:07,862 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:44:07,863 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep60-2.i [2019-11-24 05:44:07,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/293dcf5ec/f8ffca532d414c3aa33574108dfa2e9b/FLAG4e9cec173 [2019-11-24 05:44:08,383 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:44:08,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep60-2.i [2019-11-24 05:44:08,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/293dcf5ec/f8ffca532d414c3aa33574108dfa2e9b/FLAG4e9cec173 [2019-11-24 05:44:08,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/293dcf5ec/f8ffca532d414c3aa33574108dfa2e9b [2019-11-24 05:44:08,816 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:44:08,818 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:44:08,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:44:08,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:44:08,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:44:08,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:44:08" (1/1) ... [2019-11-24 05:44:08,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32876bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:08, skipping insertion in model container [2019-11-24 05:44:08,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:44:08" (1/1) ... [2019-11-24 05:44:08,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:44:08,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:44:09,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:44:09,072 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:44:09,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:44:09,110 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:44:09,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09 WrapperNode [2019-11-24 05:44:09,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:44:09,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:44:09,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:44:09,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:44:09,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:44:09,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:44:09,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:44:09,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:44:09,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:44:09,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:44:09,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:44:09,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:44:09,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:44:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 05:44:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:44:09,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:44:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 05:44:09,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:44:09,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 05:44:09,955 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:44:09,956 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-24 05:44:09,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:44:09 BoogieIcfgContainer [2019-11-24 05:44:09,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:44:09,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:44:09,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:44:09,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:44:09,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:44:08" (1/3) ... [2019-11-24 05:44:09,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687bd723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:44:09, skipping insertion in model container [2019-11-24 05:44:09,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (2/3) ... [2019-11-24 05:44:09,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687bd723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:44:09, skipping insertion in model container [2019-11-24 05:44:09,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:44:09" (3/3) ... [2019-11-24 05:44:09,966 INFO L109 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2019-11-24 05:44:09,976 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:44:09,984 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 05:44:09,996 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 05:44:10,020 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:44:10,020 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:44:10,021 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:44:10,021 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:44:10,021 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:44:10,022 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:44:10,022 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:44:10,022 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:44:10,035 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 05:44:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:44:10,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:44:10,041 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:44:10,042 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:44:10,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:44:10,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1115299327, now seen corresponding path program 1 times [2019-11-24 05:44:10,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:44:10,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477383953] [2019-11-24 05:44:10,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:44:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:44:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:44:10,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477383953] [2019-11-24 05:44:10,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:44:10,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:44:10,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88704595] [2019-11-24 05:44:10,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:44:10,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:44:10,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:44:10,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:44:10,219 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-24 05:44:10,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:44:10,248 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-24 05:44:10,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:44:10,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:44:10,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:44:10,258 INFO L225 Difference]: With dead ends: 21 [2019-11-24 05:44:10,259 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 05:44:10,262 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 05:44:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 05:44:10,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 05:44:10,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 05:44:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-24 05:44:10,299 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-24 05:44:10,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:44:10,300 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-24 05:44:10,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:44:10,300 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-24 05:44:10,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:44:10,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:44:10,301 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:44:10,301 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:44:10,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:44:10,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1991853340, now seen corresponding path program 1 times [2019-11-24 05:44:10,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:44:10,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816438053] [2019-11-24 05:44:10,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:44:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:44:10,373 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 05:44:10,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816438053] [2019-11-24 05:44:10,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25833760] [2019-11-24 05:44:10,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:44:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:44:10,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:44:10,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:44:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 05:44:10,500 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:44:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 05:44:10,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:44:10,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:44:10,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367051574] [2019-11-24 05:44:10,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:44:10,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:44:10,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:44:10,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:44:10,525 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-24 05:44:10,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:44:10,585 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-24 05:44:10,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:44:10,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 05:44:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:44:10,587 INFO L225 Difference]: With dead ends: 22 [2019-11-24 05:44:10,587 INFO L226 Difference]: Without dead ends: 16 [2019-11-24 05:44:10,589 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:44:10,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-24 05:44:10,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-24 05:44:10,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 05:44:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-24 05:44:10,595 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-24 05:44:10,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:44:10,596 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-24 05:44:10,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:44:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-24 05:44:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:44:10,598 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:44:10,599 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:44:10,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:44:10,805 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:44:10,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:44:10,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1952849532, now seen corresponding path program 1 times [2019-11-24 05:44:10,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:44:10,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562037597] [2019-11-24 05:44:10,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:44:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:44:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-24 05:44:10,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562037597] [2019-11-24 05:44:10,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372606534] [2019-11-24 05:44:10,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:44:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:44:10,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:44:10,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:44:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 05:44:10,982 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:44:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 05:44:10,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:44:10,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:44:10,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880153855] [2019-11-24 05:44:10,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:44:10,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:44:10,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:44:10,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:44:10,999 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-24 05:44:11,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:44:11,019 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-24 05:44:11,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:44:11,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 05:44:11,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:44:11,021 INFO L225 Difference]: With dead ends: 24 [2019-11-24 05:44:11,021 INFO L226 Difference]: Without dead ends: 18 [2019-11-24 05:44:11,022 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:44:11,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-24 05:44:11,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-24 05:44:11,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-24 05:44:11,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-24 05:44:11,028 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-24 05:44:11,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:44:11,029 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-24 05:44:11,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:44:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-24 05:44:11,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:44:11,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:44:11,031 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:44:11,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:44:11,232 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:44:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:44:11,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1248077028, now seen corresponding path program 1 times [2019-11-24 05:44:11,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:44:11,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701764668] [2019-11-24 05:44:11,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:44:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:44:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:44:11,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701764668] [2019-11-24 05:44:11,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933067778] [2019-11-24 05:44:11,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:44:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:44:11,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:44:11,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:44:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:44:11,366 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:44:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:44:11,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [70281011] [2019-11-24 05:44:11,419 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 05:44:11,419 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:44:11,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:44:11,432 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:44:11,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:44:36,610 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 226 [2019-11-24 05:44:36,775 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 224 [2019-11-24 05:44:36,919 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2019-11-24 05:44:37,026 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 224 [2019-11-24 05:45:03,956 WARN L192 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 487 [2019-11-24 05:45:06,331 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 461 [2019-11-24 05:45:06,926 WARN L192 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 874 [2019-11-24 05:45:09,881 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 12290 conjuctions. This might take some time... [2019-11-24 05:45:20,613 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 12254 conjuctions. This might take some time...