/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/sep10-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:42:56,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:42:56,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:42:56,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:42:56,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:42:56,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:42:56,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:42:56,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:42:56,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:42:56,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:42:56,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:42:56,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:42:56,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:42:56,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:42:56,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:42:56,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:42:56,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:42:56,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:42:56,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:42:56,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:42:56,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:42:56,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:42:56,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:42:56,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:42:56,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:42:56,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:42:56,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:42:56,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:42:56,306 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 05:42:56,328 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:42:56,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:42:56,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:42:56,330 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:42:56,330 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:42:56,330 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:42:56,330 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:42:56,330 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:42:56,331 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:42:56,331 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:42:56,331 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:42:56,331 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:42:56,331 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:42:56,332 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:42:56,332 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:42:56,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:42:56,333 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:42:56,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:42:56,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:42:56,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:42:56,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:42:56,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:42:56,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:42:56,334 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:42:56,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:42:56,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:42:56,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:42:56,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:42:56,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:42:56,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:42:56,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:42:56,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:42:56,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:42:56,336 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:42:56,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:42:56,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:42:56,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:42:56,337 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:42:56,628 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:42:56,641 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:42:56,644 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:42:56,646 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:42:56,646 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:42:56,646 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-11-24 05:42:56,708 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b35e2e890/b7b43245fe02404aab7a4295dc37824a/FLAG29e1be114 [2019-11-24 05:42:57,164 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:42:57,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-11-24 05:42:57,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b35e2e890/b7b43245fe02404aab7a4295dc37824a/FLAG29e1be114 [2019-11-24 05:42:57,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b35e2e890/b7b43245fe02404aab7a4295dc37824a [2019-11-24 05:42:57,557 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:42:57,558 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:42:57,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:42:57,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:42:57,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:42:57,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67bb72c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57, skipping insertion in model container [2019-11-24 05:42:57,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:42:57,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:42:57,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:42:57,807 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:42:57,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:42:57,846 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:42:57,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57 WrapperNode [2019-11-24 05:42:57,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:42:57,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:42:57,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:42:57,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:42:57,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:42:57,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:42:57,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:42:57,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:42:57,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:58,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:58,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:42:58,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:42:58,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:42:58,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:42:58,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (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 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:42:58,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:42:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 05:42:58,690 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:42:58,691 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-24 05:42:58,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:42:58 BoogieIcfgContainer [2019-11-24 05:42:58,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:42:58,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:42:58,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:42:58,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:42:58,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:42:57" (1/3) ... [2019-11-24 05:42:58,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514dda9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:42:58, skipping insertion in model container [2019-11-24 05:42:58,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (2/3) ... [2019-11-24 05:42:58,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514dda9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:42:58, skipping insertion in model container [2019-11-24 05:42:58,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:42:58" (3/3) ... [2019-11-24 05:42:58,705 INFO L109 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2019-11-24 05:42:58,716 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:42:58,723 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 05:42:58,736 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 05:42:58,758 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:42:58,758 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:42:58,758 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:42:58,758 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:42:58,759 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:42:58,759 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:42:58,759 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:42:58,759 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:42:58,771 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 05:42:58,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:42:58,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:42:58,777 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:42:58,777 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:42:58,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:42:58,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1115299327, now seen corresponding path program 1 times [2019-11-24 05:42:58,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:42:58,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148857262] [2019-11-24 05:42:58,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:42:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:42:58,934 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 05:42:58,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148857262] [2019-11-24 05:42:58,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:42:58,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:42:58,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912709210] [2019-11-24 05:42:58,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:42:58,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:42:58,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:42:58,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:42:58,956 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-24 05:42:58,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:42:58,983 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-24 05:42:58,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:42:58,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:42:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:42:58,995 INFO L225 Difference]: With dead ends: 21 [2019-11-24 05:42:58,996 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 05:42:58,999 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 05:42:59,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 05:42:59,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 05:42:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 05:42:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-24 05:42:59,033 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-24 05:42:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:42:59,034 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-24 05:42:59,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:42:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-24 05:42:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:42:59,035 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:42:59,035 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:42:59,035 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:42:59,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:42:59,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1991853340, now seen corresponding path program 1 times [2019-11-24 05:42:59,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:42:59,037 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789891677] [2019-11-24 05:42:59,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:42:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:42:59,097 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 05:42:59,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789891677] [2019-11-24 05:42:59,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652872121] [2019-11-24 05:42:59,098 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 05:42:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:42:59,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:42:59,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:42:59,186 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 05:42:59,186 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:42:59,203 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 05:42:59,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:42:59,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:42:59,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352850156] [2019-11-24 05:42:59,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:42:59,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:42:59,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:42:59,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:42:59,208 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-24 05:42:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:42:59,253 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-24 05:42:59,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:42:59,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 05:42:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:42:59,255 INFO L225 Difference]: With dead ends: 22 [2019-11-24 05:42:59,255 INFO L226 Difference]: Without dead ends: 16 [2019-11-24 05:42:59,256 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 05:42:59,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-24 05:42:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-24 05:42:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 05:42:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-24 05:42:59,261 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-24 05:42:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:42:59,261 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-24 05:42:59,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:42:59,261 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-24 05:42:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:42:59,262 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:42:59,262 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:42:59,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:42:59,465 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:42:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:42:59,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1952849532, now seen corresponding path program 1 times [2019-11-24 05:42:59,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:42:59,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167000736] [2019-11-24 05:42:59,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:42:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:42:59,540 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 05:42:59,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167000736] [2019-11-24 05:42:59,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594318995] [2019-11-24 05:42:59,541 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 05:42:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:42:59,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:42:59,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:42:59,637 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 05:42:59,638 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:42:59,655 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 05:42:59,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:42:59,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:42:59,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101089556] [2019-11-24 05:42:59,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:42:59,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:42:59,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:42:59,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:42:59,658 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-24 05:42:59,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:42:59,673 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-24 05:42:59,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:42:59,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 05:42:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:42:59,675 INFO L225 Difference]: With dead ends: 24 [2019-11-24 05:42:59,676 INFO L226 Difference]: Without dead ends: 18 [2019-11-24 05:42:59,676 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 05:42:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-24 05:42:59,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-24 05:42:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-24 05:42:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-24 05:42:59,683 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-24 05:42:59,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:42:59,683 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-24 05:42:59,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:42:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-24 05:42:59,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:42:59,684 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:42:59,685 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:42:59,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:42:59,886 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:42:59,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:42:59,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1248077028, now seen corresponding path program 1 times [2019-11-24 05:42:59,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:42:59,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546707908] [2019-11-24 05:42:59,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:42:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:42:59,985 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 05:42:59,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546707908] [2019-11-24 05:42:59,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927326423] [2019-11-24 05:42:59,986 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 05:43:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:00,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:43:00,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:43:00,080 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 05:43:00,081 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:43:00,106 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 05:43:00,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [276294067] [2019-11-24 05:43:00,158 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 05:43:00,159 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:43:00,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:43:00,185 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:43:00,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:43:04,522 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 353 [2019-11-24 05:43:06,730 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 333 [2019-11-24 05:43:07,090 WARN L192 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 583 [2019-11-24 05:43:11,279 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7670 conjuctions. This might take some time... [2019-11-24 05:43:15,883 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7664 conjuctions. This might take some time... [2019-11-24 05:43:41,596 WARN L192 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 583 [2019-11-24 05:43:42,395 WARN L192 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 1112 DAG size of output: 1105 [2019-11-24 05:43:45,500 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6130 conjuctions. This might take some time... [2019-11-24 05:43:49,564 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7466 conjuctions. This might take some time... [2019-11-24 05:44:15,086 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6168 conjuctions. This might take some time... [2019-11-24 05:44:20,135 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 14854 conjuctions. This might take some time... [2019-11-24 05:44:41,933 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6160 conjuctions. This might take some time...