/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_init3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:24:05,488 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:24:05,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:24:05,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:24:05,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:24:05,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:24:05,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:24:05,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:24:05,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:24:05,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:24:05,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:24:05,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:24:05,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:24:05,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:24:05,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:24:05,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:24:05,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:24:05,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:24:05,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 01:24:05,620 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:24:05,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:24:05,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:24:05,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:24:05,622 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:24:05,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:24:05,623 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:24:05,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:24:05,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:24:05,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:24:05,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:24:05,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:24:05,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:24:05,627 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:24:05,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:24:05,627 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:24:05,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:24:05,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:24:05,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:24:05,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:24:05,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:24:05,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:24:05,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:24:05,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:24:05,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:24:05,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:24:05,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:24:05,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:24:05,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:24:05,904 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:24:05,926 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:24:05,930 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:24:05,931 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:24:05,932 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:24:05,933 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init3_ground-2.i [2019-11-07 01:24:06,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d60e9bfb/00cd8775d7b14076802cddf43ac44294/FLAG251e3e040 [2019-11-07 01:24:06,445 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:24:06,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init3_ground-2.i [2019-11-07 01:24:06,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d60e9bfb/00cd8775d7b14076802cddf43ac44294/FLAG251e3e040 [2019-11-07 01:24:06,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d60e9bfb/00cd8775d7b14076802cddf43ac44294 [2019-11-07 01:24:06,918 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:24:06,926 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:24:06,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:06,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:24:06,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:24:06,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:06" (1/1) ... [2019-11-07 01:24:06,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e5ac96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:06, skipping insertion in model container [2019-11-07 01:24:06,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:06" (1/1) ... [2019-11-07 01:24:06,983 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:24:07,024 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:24:07,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:07,341 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:24:07,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:07,378 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:24:07,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07 WrapperNode [2019-11-07 01:24:07,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:07,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:24:07,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:24:07,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:24:07,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:07,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:07,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:07,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:07,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:07,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:07,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (1/1) ... [2019-11-07 01:24:07,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:24:07,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:24:07,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:24:07,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:24:07,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (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 [2019-11-07 01:24:07,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:24:07,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:24:07,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:24:07,557 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:24:07,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:24:07,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:24:07,559 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:24:07,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:24:07,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:24:07,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:24:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:24:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:24:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:24:07,921 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:24:07,921 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-07 01:24:07,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:07 BoogieIcfgContainer [2019-11-07 01:24:07,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:24:07,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:24:07,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:24:07,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:24:07,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:24:06" (1/3) ... [2019-11-07 01:24:07,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d59cdb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:07, skipping insertion in model container [2019-11-07 01:24:07,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:07" (2/3) ... [2019-11-07 01:24:07,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d59cdb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:07, skipping insertion in model container [2019-11-07 01:24:07,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:07" (3/3) ... [2019-11-07 01:24:07,930 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-2.i [2019-11-07 01:24:07,940 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:24:07,947 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:24:07,959 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:24:07,986 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:24:07,986 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:24:07,986 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:24:07,986 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:24:07,987 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:24:07,987 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:24:07,987 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:24:07,987 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:24:08,002 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-07 01:24:08,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:24:08,008 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:08,009 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:08,010 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:08,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1905658029, now seen corresponding path program 1 times [2019-11-07 01:24:08,023 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:08,023 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235408121] [2019-11-07 01:24:08,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:24:08,186 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235408121] [2019-11-07 01:24:08,188 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:24:08,188 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:24:08,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088654914] [2019-11-07 01:24:08,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:24:08,198 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:08,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:24:08,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:24:08,223 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-07 01:24:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:08,316 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2019-11-07 01:24:08,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:24:08,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 01:24:08,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:08,330 INFO L225 Difference]: With dead ends: 37 [2019-11-07 01:24:08,331 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 01:24:08,337 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:24:08,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 01:24:08,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 01:24:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 01:24:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-07 01:24:08,386 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2019-11-07 01:24:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:08,386 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-07 01:24:08,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:24:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-07 01:24:08,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 01:24:08,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:08,390 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:08,390 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:08,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:08,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1984082666, now seen corresponding path program 1 times [2019-11-07 01:24:08,391 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:08,392 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778787219] [2019-11-07 01:24:08,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:24:08,538 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778787219] [2019-11-07 01:24:08,538 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167279916] [2019-11-07 01:24:08,538 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 [2019-11-07 01:24:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:08,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:24:08,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:24:08,674 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:24:08,710 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [380189125] [2019-11-07 01:24:08,736 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:24:08,737 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:08,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:08,751 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:08,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:08,916 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:09,414 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:09,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:09,427 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:09,824 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:09,825 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-11-07 01:24:09,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366600655] [2019-11-07 01:24:09,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:24:09,828 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:09,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:24:09,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:24:09,829 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 17 states. [2019-11-07 01:24:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:10,628 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2019-11-07 01:24:10,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:24:10,628 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2019-11-07 01:24:10,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:10,630 INFO L225 Difference]: With dead ends: 51 [2019-11-07 01:24:10,630 INFO L226 Difference]: Without dead ends: 38 [2019-11-07 01:24:10,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:24:10,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-07 01:24:10,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2019-11-07 01:24:10,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 01:24:10,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-11-07 01:24:10,642 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 16 [2019-11-07 01:24:10,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:10,642 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-11-07 01:24:10,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:24:10,642 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-11-07 01:24:10,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 01:24:10,643 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:10,644 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:10,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:10,850 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:10,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:10,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1492132205, now seen corresponding path program 2 times [2019-11-07 01:24:10,851 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:10,852 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575730272] [2019-11-07 01:24:10,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 01:24:10,971 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575730272] [2019-11-07 01:24:10,972 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624350774] [2019-11-07 01:24:10,972 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-07 01:24:11,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:24:11,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:24:11,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:24:11,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 01:24:11,059 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 01:24:11,127 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108868463] [2019-11-07 01:24:11,128 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:24:11,128 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:11,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:11,129 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:11,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:11,157 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:11,409 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:11,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:11,418 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:11,811 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:11,811 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-11-07 01:24:11,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051645284] [2019-11-07 01:24:11,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:24:11,813 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:11,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:24:11,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:24:11,814 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 23 states. [2019-11-07 01:24:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:12,804 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2019-11-07 01:24:12,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:24:12,805 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2019-11-07 01:24:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:12,806 INFO L225 Difference]: With dead ends: 75 [2019-11-07 01:24:12,807 INFO L226 Difference]: Without dead ends: 56 [2019-11-07 01:24:12,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:24:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-07 01:24:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-11-07 01:24:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-07 01:24:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-11-07 01:24:12,821 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 25 [2019-11-07 01:24:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:12,821 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-11-07 01:24:12,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:24:12,821 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-11-07 01:24:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-07 01:24:12,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:12,823 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:13,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:13,035 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:13,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:13,035 INFO L82 PathProgramCache]: Analyzing trace with hash -776537459, now seen corresponding path program 3 times [2019-11-07 01:24:13,036 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:13,036 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574361905] [2019-11-07 01:24:13,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-07 01:24:13,258 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574361905] [2019-11-07 01:24:13,258 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218205601] [2019-11-07 01:24:13,258 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-07 01:24:13,329 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:24:13,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:24:13,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:24:13,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-07 01:24:13,353 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-07 01:24:13,579 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [286890530] [2019-11-07 01:24:13,580 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:24:13,581 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:13,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:13,581 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:13,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:13,602 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:13,836 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:13,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:13,844 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:14,178 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:14,179 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-11-07 01:24:14,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850889862] [2019-11-07 01:24:14,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:24:14,180 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:14,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:24:14,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:24:14,182 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 35 states. [2019-11-07 01:24:15,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:15,959 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2019-11-07 01:24:15,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:24:15,959 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2019-11-07 01:24:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:15,962 INFO L225 Difference]: With dead ends: 123 [2019-11-07 01:24:15,963 INFO L226 Difference]: Without dead ends: 92 [2019-11-07 01:24:15,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:24:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-07 01:24:15,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2019-11-07 01:24:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-07 01:24:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2019-11-07 01:24:16,002 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 43 [2019-11-07 01:24:16,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:16,003 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2019-11-07 01:24:16,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:24:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2019-11-07 01:24:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-07 01:24:16,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:16,009 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:16,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:16,215 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:16,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1525888205, now seen corresponding path program 4 times [2019-11-07 01:24:16,216 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:16,216 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945165751] [2019-11-07 01:24:16,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-11-07 01:24:16,693 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945165751] [2019-11-07 01:24:16,695 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216996447] [2019-11-07 01:24:16,696 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:16,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:24:16,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-11-07 01:24:16,833 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-11-07 01:24:17,587 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1231579001] [2019-11-07 01:24:17,588 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:24:17,588 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:17,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:17,589 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:17,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:17,613 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:17,786 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:17,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:17,794 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:18,200 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:18,201 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-11-07 01:24:18,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767945311] [2019-11-07 01:24:18,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:24:18,204 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:18,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:24:18,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:24:18,207 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 59 states. [2019-11-07 01:24:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:21,897 INFO L93 Difference]: Finished difference Result 219 states and 296 transitions. [2019-11-07 01:24:21,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:24:21,898 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 79 [2019-11-07 01:24:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:21,901 INFO L225 Difference]: With dead ends: 219 [2019-11-07 01:24:21,901 INFO L226 Difference]: Without dead ends: 164 [2019-11-07 01:24:21,908 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:24:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-07 01:24:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2019-11-07 01:24:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-11-07 01:24:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2019-11-07 01:24:21,947 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 79 [2019-11-07 01:24:21,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:21,947 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2019-11-07 01:24:21,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:24:21,947 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2019-11-07 01:24:21,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-07 01:24:21,951 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:21,951 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:22,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:22,152 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:22,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:22,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1051866803, now seen corresponding path program 5 times [2019-11-07 01:24:22,153 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:22,153 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6304652] [2019-11-07 01:24:22,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2019-11-07 01:24:23,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6304652] [2019-11-07 01:24:23,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681605201] [2019-11-07 01:24:23,239 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true