/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/reducercommutativity/sum60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:40:42,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:40:42,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:40:42,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 04:40:42,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:40:42,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:40:42,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:40:42,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:40:42,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:40:42,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:40:42,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:40:42,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:40:42,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:40:42,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:40:42,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:40:42,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:40:42,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:40:42,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:40:42,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:40:42,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:40:42,688 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 04:40:42,706 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:40:42,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:40:42,707 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:40:42,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:40:42,708 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:40:42,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:40:42,708 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:40:42,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:40:42,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:40:42,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:40:42,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:40:42,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:40:42,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:40:42,710 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:40:42,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:40:42,710 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:40:42,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:40:42,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:40:42,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:40:42,711 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:40:42,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:40:42,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:40:42,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:40:42,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:40:42,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:40:42,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:40:42,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:40:42,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:40:42,712 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 04:40:43,060 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:40:43,080 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:40:43,084 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:40:43,086 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:40:43,086 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:40:43,087 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum60-2.i [2019-11-07 04:40:43,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fe950eae/71942520aa984385a5f4f13eb0f3d0e4/FLAG980176dd9 [2019-11-07 04:40:43,586 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:40:43,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum60-2.i [2019-11-07 04:40:43,593 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fe950eae/71942520aa984385a5f4f13eb0f3d0e4/FLAG980176dd9 [2019-11-07 04:40:44,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fe950eae/71942520aa984385a5f4f13eb0f3d0e4 [2019-11-07 04:40:44,034 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:40:44,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:40:44,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:40:44,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:40:44,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:40:44,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:40:44" (1/1) ... [2019-11-07 04:40:44,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5823125d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:44, skipping insertion in model container [2019-11-07 04:40:44,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:40:44" (1/1) ... [2019-11-07 04:40:44,080 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:40:44,132 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:40:44,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:40:44,362 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:40:44,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:40:44,401 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:40:44,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:44 WrapperNode [2019-11-07 04:40:44,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:40:44,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:40:44,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:40:44,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:40:44,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:44" (1/1) ... [2019-11-07 04:40:44,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:44" (1/1) ... [2019-11-07 04:40:44,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:44" (1/1) ... [2019-11-07 04:40:44,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:44" (1/1) ... [2019-11-07 04:40:44,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:44" (1/1) ... [2019-11-07 04:40:44,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:44" (1/1) ... [2019-11-07 04:40:44,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:44" (1/1) ... [2019-11-07 04:40:44,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:40:44,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:40:44,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:40:44,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:40:44,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:44" (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 04:40:44,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:40:44,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:40:44,577 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-07 04:40:44,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:40:44,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:40:44,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:40:44,577 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-07 04:40:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:40:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:40:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:40:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:40:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:40:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:40:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:40:44,957 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:40:44,958 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 04:40:44,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:40:44 BoogieIcfgContainer [2019-11-07 04:40:44,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:40:44,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:40:44,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:40:44,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:40:44,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:40:44" (1/3) ... [2019-11-07 04:40:44,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4564817f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:40:44, skipping insertion in model container [2019-11-07 04:40:44,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:44" (2/3) ... [2019-11-07 04:40:44,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4564817f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:40:44, skipping insertion in model container [2019-11-07 04:40:44,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:40:44" (3/3) ... [2019-11-07 04:40:44,972 INFO L109 eAbstractionObserver]: Analyzing ICFG sum60-2.i [2019-11-07 04:40:44,982 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:40:44,990 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:40:45,000 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:40:45,022 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:40:45,023 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:40:45,023 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:40:45,023 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:40:45,023 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:40:45,023 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:40:45,024 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:40:45,024 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:40:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-07 04:40:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 04:40:45,046 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:45,046 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:45,048 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:45,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1818423299, now seen corresponding path program 1 times [2019-11-07 04:40:45,070 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:45,071 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186227056] [2019-11-07 04:40:45,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 04:40:45,285 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186227056] [2019-11-07 04:40:45,287 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:40:45,287 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:40:45,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619132094] [2019-11-07 04:40:45,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:40:45,301 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:45,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:40:45,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:40:45,330 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-07 04:40:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:45,377 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-11-07 04:40:45,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:40:45,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-07 04:40:45,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:45,396 INFO L225 Difference]: With dead ends: 41 [2019-11-07 04:40:45,396 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 04:40:45,402 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 04:40:45,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 04:40:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 04:40:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 04:40:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-07 04:40:45,463 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-11-07 04:40:45,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:45,464 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-07 04:40:45,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:40:45,465 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-07 04:40:45,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 04:40:45,469 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:45,470 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:45,470 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:45,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:45,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2093950433, now seen corresponding path program 1 times [2019-11-07 04:40:45,472 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:45,473 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144114041] [2019-11-07 04:40:45,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:40:45,610 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144114041] [2019-11-07 04:40:45,611 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690593250] [2019-11-07 04:40:45,614 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 04:40:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:45,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:40:45,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:40:45,747 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:40:45,795 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:40:45,795 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-11-07 04:40:45,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615869171] [2019-11-07 04:40:45,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:40:45,797 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:45,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:40:45,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:40:45,798 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-11-07 04:40:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:45,809 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-11-07 04:40:45,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:40:45,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-07 04:40:45,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:45,812 INFO L225 Difference]: With dead ends: 33 [2019-11-07 04:40:45,812 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 04:40:45,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:40:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 04:40:45,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-07 04:40:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 04:40:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-07 04:40:45,820 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-11-07 04:40:45,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:45,820 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-07 04:40:45,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:40:45,820 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-07 04:40:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 04:40:45,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:45,823 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:46,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:46,025 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:46,026 INFO L82 PathProgramCache]: Analyzing trace with hash 903502258, now seen corresponding path program 1 times [2019-11-07 04:40:46,026 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:46,027 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871702586] [2019-11-07 04:40:46,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:40:46,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871702586] [2019-11-07 04:40:46,094 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:40:46,094 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:40:46,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210441166] [2019-11-07 04:40:46,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:40:46,095 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:46,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:40:46,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:40:46,096 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-11-07 04:40:46,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:46,107 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-07 04:40:46,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:40:46,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-07 04:40:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:46,109 INFO L225 Difference]: With dead ends: 31 [2019-11-07 04:40:46,109 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 04:40:46,110 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 04:40:46,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 04:40:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 04:40:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 04:40:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-07 04:40:46,117 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-11-07 04:40:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:46,119 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-07 04:40:46,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:40:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-07 04:40:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-07 04:40:46,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:46,121 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:46,121 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:46,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:46,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2130547361, now seen corresponding path program 1 times [2019-11-07 04:40:46,122 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:46,122 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568029810] [2019-11-07 04:40:46,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:40:46,222 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568029810] [2019-11-07 04:40:46,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331174914] [2019-11-07 04:40:46,223 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 [2019-11-07 04:40:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:46,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:40:46,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:40:46,352 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:40:46,397 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [978285357] [2019-11-07 04:40:46,437 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:46,437 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:46,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:46,450 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:46,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:46,563 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:47,087 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-11-07 04:40:47,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:47,140 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:47,817 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:47,817 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 15] total 21 [2019-11-07 04:40:47,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293307592] [2019-11-07 04:40:47,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 04:40:47,819 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:47,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 04:40:47,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2019-11-07 04:40:47,821 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 21 states. [2019-11-07 04:40:49,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:49,851 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-11-07 04:40:49,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 04:40:49,851 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2019-11-07 04:40:49,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:49,852 INFO L225 Difference]: With dead ends: 40 [2019-11-07 04:40:49,852 INFO L226 Difference]: Without dead ends: 25 [2019-11-07 04:40:49,854 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2019-11-07 04:40:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-07 04:40:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-07 04:40:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 04:40:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-07 04:40:49,861 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-11-07 04:40:49,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:49,861 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-07 04:40:49,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 04:40:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-07 04:40:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 04:40:49,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:49,863 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:50,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:50,067 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:50,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:50,068 INFO L82 PathProgramCache]: Analyzing trace with hash 356639231, now seen corresponding path program 2 times [2019-11-07 04:40:50,068 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:50,068 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071574048] [2019-11-07 04:40:50,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:40:50,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071574048] [2019-11-07 04:40:50,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946583290] [2019-11-07 04:40:50,239 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 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 04:40:50,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 04:40:50,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:40:50,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:40:50,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:40:50,327 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:40:50,359 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106248123] [2019-11-07 04:40:50,361 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:50,361 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:50,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:50,362 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:50,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:50,387 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:50,763 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-11-07 04:40:50,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:50,798 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:53,493 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:53,494 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 15] total 25 [2019-11-07 04:40:53,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647193490] [2019-11-07 04:40:53,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-07 04:40:53,495 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:53,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-07 04:40:53,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=524, Unknown=1, NotChecked=0, Total=600 [2019-11-07 04:40:53,496 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 25 states. [2019-11-07 04:40:56,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:56,106 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-11-07 04:40:56,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-07 04:40:56,107 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-11-07 04:40:56,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:56,108 INFO L225 Difference]: With dead ends: 44 [2019-11-07 04:40:56,108 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 04:40:56,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=247, Invalid=1732, Unknown=1, NotChecked=0, Total=1980 [2019-11-07 04:40:56,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 04:40:56,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-07 04:40:56,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 04:40:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-07 04:40:56,121 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-11-07 04:40:56,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:56,122 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-07 04:40:56,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-07 04:40:56,122 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-07 04:40:56,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-07 04:40:56,131 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:56,131 INFO L410 BasicCegarLoop]: trace histogram [12, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:56,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:56,333 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:56,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:56,333 INFO L82 PathProgramCache]: Analyzing trace with hash 906031436, now seen corresponding path program 3 times [2019-11-07 04:40:56,333 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:56,333 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960664778] [2019-11-07 04:40:56,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:40:56,519 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960664778] [2019-11-07 04:40:56,519 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965144742] [2019-11-07 04:40:56,519 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 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 04:40:56,597 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 04:40:56,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:40:56,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 04:40:56,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:40:56,618 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:40:56,704 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1518615245] [2019-11-07 04:40:56,706 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:56,706 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:56,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:56,707 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:56,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:56,727 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:57,032 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-11-07 04:40:57,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:57,066 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:57,800 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:57,801 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 15] total 29 [2019-11-07 04:40:57,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592019304] [2019-11-07 04:40:57,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-07 04:40:57,802 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:57,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-07 04:40:57,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2019-11-07 04:40:57,803 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 29 states. [2019-11-07 04:40:59,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:59,008 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-11-07 04:40:59,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-07 04:40:59,009 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 42 [2019-11-07 04:40:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:59,010 INFO L225 Difference]: With dead ends: 54 [2019-11-07 04:40:59,010 INFO L226 Difference]: Without dead ends: 36 [2019-11-07 04:40:59,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=406, Invalid=2246, Unknown=0, NotChecked=0, Total=2652 [2019-11-07 04:40:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-07 04:40:59,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-07 04:40:59,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-07 04:40:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-07 04:40:59,020 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-11-07 04:40:59,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:59,021 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-07 04:40:59,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-07 04:40:59,021 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-07 04:40:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-07 04:40:59,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:59,023 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:59,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:59,228 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:59,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:59,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1194663378, now seen corresponding path program 4 times [2019-11-07 04:40:59,229 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:59,229 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933143933] [2019-11-07 04:40:59,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:40:59,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933143933] [2019-11-07 04:40:59,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065319643] [2019-11-07 04:40:59,411 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 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 [2019-11-07 04:40:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:59,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-07 04:40:59,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:40:59,517 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:40:59,830 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [688588289] [2019-11-07 04:40:59,831 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:59,832 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:59,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:59,832 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:59,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:59,862 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:41:00,160 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-11-07 04:41:00,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:41:00,181 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:41:00,847 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:41:00,848 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15] total 43 [2019-11-07 04:41:00,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102261484] [2019-11-07 04:41:00,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-07 04:41:00,849 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:41:00,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-07 04:41:00,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2019-11-07 04:41:00,851 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 43 states. [2019-11-07 04:41:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:41:02,821 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-11-07 04:41:02,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-07 04:41:02,821 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2019-11-07 04:41:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:41:02,823 INFO L225 Difference]: With dead ends: 68 [2019-11-07 04:41:02,823 INFO L226 Difference]: Without dead ends: 50 [2019-11-07 04:41:02,825 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1281, Invalid=5039, Unknown=0, NotChecked=0, Total=6320 [2019-11-07 04:41:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-07 04:41:02,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-07 04:41:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-07 04:41:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-07 04:41:02,835 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-11-07 04:41:02,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:41:02,836 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-07 04:41:02,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-07 04:41:02,836 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-07 04:41:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-07 04:41:02,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:41:02,837 INFO L410 BasicCegarLoop]: trace histogram [26, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:41:03,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:41:03,043 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:41:03,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:41:03,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1997950062, now seen corresponding path program 5 times [2019-11-07 04:41:03,044 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:41:03,044 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345121821] [2019-11-07 04:41:03,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:41:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:41:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:41:03,467 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345121821] [2019-11-07 04:41:03,468 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498187231] [2019-11-07 04:41:03,468 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:41:03,553 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 04:41:03,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:41:03,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:41:03,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:41:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-11-07 04:41:03,598 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:41:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-11-07 04:41:03,638 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [157967117] [2019-11-07 04:41:03,640 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:41:03,640 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:41:03,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:41:03,640 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:41:03,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:41:03,656 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:41:03,883 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-11-07 04:41:03,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:41:03,907 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:41:04,816 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:41:04,817 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 15] total 47 [2019-11-07 04:41:04,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199376172] [2019-11-07 04:41:04,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-07 04:41:04,819 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:41:04,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-07 04:41:04,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=1702, Unknown=0, NotChecked=0, Total=2162 [2019-11-07 04:41:04,821 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 47 states. [2019-11-07 04:41:13,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:41:13,359 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-11-07 04:41:13,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-07 04:41:13,360 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 63 [2019-11-07 04:41:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:41:13,361 INFO L225 Difference]: With dead ends: 72 [2019-11-07 04:41:13,362 INFO L226 Difference]: Without dead ends: 54 [2019-11-07 04:41:13,365 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1386, Invalid=6445, Unknown=1, NotChecked=0, Total=7832 [2019-11-07 04:41:13,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-07 04:41:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-07 04:41:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-07 04:41:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-11-07 04:41:13,374 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-11-07 04:41:13,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:41:13,374 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-11-07 04:41:13,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-07 04:41:13,375 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-11-07 04:41:13,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-07 04:41:13,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:41:13,376 INFO L410 BasicCegarLoop]: trace histogram [27, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:41:13,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:41:13,581 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:41:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:41:13,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1475332959, now seen corresponding path program 6 times [2019-11-07 04:41:13,582 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:41:13,583 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145898690] [2019-11-07 04:41:13,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:41:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:41:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 04:41:14,067 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145898690] [2019-11-07 04:41:14,067 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710261354] [2019-11-07 04:41:14,068 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:41:14,183 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 04:41:14,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:41:14,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 04:41:14,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:41:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 04:41:14,218 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:41:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 04:41:15,808 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [719194573] [2019-11-07 04:41:15,810 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:41:15,810 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:41:15,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:41:15,811 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:41:15,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:41:15,834 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:41:16,072 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-11-07 04:41:16,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:41:16,086 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:41:16,904 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:41:16,904 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 15] total 73 [2019-11-07 04:41:16,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599975579] [2019-11-07 04:41:16,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-11-07 04:41:16,905 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:41:16,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-11-07 04:41:16,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=3505, Unknown=0, NotChecked=0, Total=5256 [2019-11-07 04:41:16,907 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 73 states. [2019-11-07 04:41:21,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:41:21,125 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-11-07 04:41:21,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-11-07 04:41:21,126 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 67 [2019-11-07 04:41:21,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:41:21,127 INFO L225 Difference]: With dead ends: 104 [2019-11-07 04:41:21,127 INFO L226 Difference]: Without dead ends: 83 [2019-11-07 04:41:21,133 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4667 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5136, Invalid=14324, Unknown=0, NotChecked=0, Total=19460 [2019-11-07 04:41:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-07 04:41:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-11-07 04:41:21,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-07 04:41:21,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-07 04:41:21,145 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 67 [2019-11-07 04:41:21,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:41:21,146 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-07 04:41:21,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-11-07 04:41:21,146 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-07 04:41:21,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 04:41:21,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:41:21,148 INFO L410 BasicCegarLoop]: trace histogram [56, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:41:21,365 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:41:21,365 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:41:21,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:41:21,366 INFO L82 PathProgramCache]: Analyzing trace with hash 441486205, now seen corresponding path program 7 times [2019-11-07 04:41:21,366 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:41:21,366 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092437792] [2019-11-07 04:41:21,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:41:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:41:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 04:41:22,914 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092437792] [2019-11-07 04:41:22,914 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022175384] [2019-11-07 04:41:22,914 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:41:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:41:23,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 58 conjunts are in the unsatisfiable core [2019-11-07 04:41:23,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:41:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 04:41:23,093 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:41:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 04:41:24,648 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1133526847] [2019-11-07 04:41:24,650 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:41:24,650 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:41:24,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:41:24,651 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:41:24,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:41:24,681 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:41:24,914 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 1 for LOIs [2019-11-07 04:41:24,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:41:24,928 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:41:26,119 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:41:26,119 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59, 15] total 77 [2019-11-07 04:41:26,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645647207] [2019-11-07 04:41:26,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-11-07 04:41:26,121 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:41:26,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-11-07 04:41:26,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=3859, Unknown=0, NotChecked=0, Total=5852 [2019-11-07 04:41:26,124 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 77 states.