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-crafted/zero_sum_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:13,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:13,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:13,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:31:13,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:31:13,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:31:13,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:31:13,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:31:13,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:31:13,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:31:13,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:31:13,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:31:13,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:13,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:13,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:13,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:13,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:13,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:13,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:13,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:13,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:13,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:13,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:13,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:13,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:31:13,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:31:13,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:31:13,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:31:13,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:31:13,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:31:13,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:31:13,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:31:13,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:31:13,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:13,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:13,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:13,123 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 [2019-10-15 01:31:13,151 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:13,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:13,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:13,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:13,163 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:13,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:13,164 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:13,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:13,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:13,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:13,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:13,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:13,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:13,165 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:13,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:13,165 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:13,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:13,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:13,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:13,167 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:13,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:13,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:13,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:13,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:13,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:13,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:13,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:13,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:13,169 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 [2019-10-15 01:31:13,436 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:13,458 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:13,461 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:13,462 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:13,463 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:13,464 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2019-10-15 01:31:13,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a73b01aa3/286c356863c14a93a1b2148dcf5d562f/FLAGc2278139b [2019-10-15 01:31:14,006 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:14,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2019-10-15 01:31:14,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a73b01aa3/286c356863c14a93a1b2148dcf5d562f/FLAGc2278139b [2019-10-15 01:31:14,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a73b01aa3/286c356863c14a93a1b2148dcf5d562f [2019-10-15 01:31:14,354 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:14,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:14,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:14,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:14,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:14,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:14" (1/1) ... [2019-10-15 01:31:14,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad4c578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:14, skipping insertion in model container [2019-10-15 01:31:14,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:14" (1/1) ... [2019-10-15 01:31:14,372 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:14,393 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:14,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:14,589 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:14,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:14,636 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:14,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:14 WrapperNode [2019-10-15 01:31:14,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:14,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:14,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:14,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:14,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:14" (1/1) ... [2019-10-15 01:31:14,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:14" (1/1) ... [2019-10-15 01:31:14,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:14" (1/1) ... [2019-10-15 01:31:14,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:14" (1/1) ... [2019-10-15 01:31:14,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:14" (1/1) ... [2019-10-15 01:31:14,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:14" (1/1) ... [2019-10-15 01:31:14,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:14" (1/1) ... [2019-10-15 01:31:14,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:14,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:14,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:14,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:14,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:14" (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 [2019-10-15 01:31:14,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:14,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:14,827 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:14,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:31:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-10-15 01:31:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:31:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:15,389 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:15,390 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-15 01:31:15,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:15 BoogieIcfgContainer [2019-10-15 01:31:15,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:15,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:15,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:15,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:15,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:14" (1/3) ... [2019-10-15 01:31:15,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5d876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:15, skipping insertion in model container [2019-10-15 01:31:15,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:14" (2/3) ... [2019-10-15 01:31:15,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5d876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:15, skipping insertion in model container [2019-10-15 01:31:15,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:15" (3/3) ... [2019-10-15 01:31:15,402 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2019-10-15 01:31:15,413 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:15,422 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:15,434 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:15,461 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:15,462 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:15,462 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:15,462 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:15,463 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:15,463 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:15,463 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:15,463 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-15 01:31:15,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:31:15,490 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:15,491 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:15,494 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:15,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:15,500 INFO L82 PathProgramCache]: Analyzing trace with hash -205990741, now seen corresponding path program 1 times [2019-10-15 01:31:15,510 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:15,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418521384] [2019-10-15 01:31:15,511 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:15,511 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:15,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:15,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418521384] [2019-10-15 01:31:15,740 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:15,741 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:31:15,741 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653047829] [2019-10-15 01:31:15,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:31:15,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:15,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:31:15,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:31:15,763 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2019-10-15 01:31:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:15,894 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2019-10-15 01:31:15,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:31:15,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-15 01:31:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:15,906 INFO L225 Difference]: With dead ends: 56 [2019-10-15 01:31:15,906 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 01:31:15,910 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:31:15,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 01:31:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-15 01:31:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:31:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 51 transitions. [2019-10-15 01:31:15,952 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 51 transitions. Word has length 21 [2019-10-15 01:31:15,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:15,952 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 51 transitions. [2019-10-15 01:31:15,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:31:15,953 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 51 transitions. [2019-10-15 01:31:15,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:31:15,954 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:15,954 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:15,954 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:15,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:15,955 INFO L82 PathProgramCache]: Analyzing trace with hash 940905143, now seen corresponding path program 1 times [2019-10-15 01:31:15,955 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:15,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563212857] [2019-10-15 01:31:15,956 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:15,956 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:15,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:16,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563212857] [2019-10-15 01:31:16,012 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:16,012 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:16,012 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092739520] [2019-10-15 01:31:16,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:16,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:16,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:16,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:16,015 INFO L87 Difference]: Start difference. First operand 32 states and 51 transitions. Second operand 3 states. [2019-10-15 01:31:16,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:16,072 INFO L93 Difference]: Finished difference Result 58 states and 96 transitions. [2019-10-15 01:31:16,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:16,073 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-10-15 01:31:16,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:16,074 INFO L225 Difference]: With dead ends: 58 [2019-10-15 01:31:16,074 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 01:31:16,075 INFO L600 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 [2019-10-15 01:31:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 01:31:16,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-15 01:31:16,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 01:31:16,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 52 transitions. [2019-10-15 01:31:16,084 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 52 transitions. Word has length 22 [2019-10-15 01:31:16,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:16,084 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 52 transitions. [2019-10-15 01:31:16,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 52 transitions. [2019-10-15 01:31:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 01:31:16,086 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:16,086 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:16,086 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:16,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:16,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1041186174, now seen corresponding path program 1 times [2019-10-15 01:31:16,087 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:16,088 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804641503] [2019-10-15 01:31:16,088 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:16,088 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:16,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:31:16,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804641503] [2019-10-15 01:31:16,152 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:16,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:31:16,153 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503106263] [2019-10-15 01:31:16,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:31:16,154 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:16,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:31:16,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:31:16,155 INFO L87 Difference]: Start difference. First operand 33 states and 52 transitions. Second operand 4 states. [2019-10-15 01:31:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:16,266 INFO L93 Difference]: Finished difference Result 56 states and 92 transitions. [2019-10-15 01:31:16,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:31:16,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-15 01:31:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:16,267 INFO L225 Difference]: With dead ends: 56 [2019-10-15 01:31:16,268 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 01:31:16,268 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:31:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 01:31:16,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-15 01:31:16,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 01:31:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2019-10-15 01:31:16,276 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 23 [2019-10-15 01:31:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:16,276 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2019-10-15 01:31:16,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:31:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2019-10-15 01:31:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:31:16,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:16,278 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:16,278 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash 608840992, now seen corresponding path program 1 times [2019-10-15 01:31:16,279 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:16,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8677362] [2019-10-15 01:31:16,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:16,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:16,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:31:16,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8677362] [2019-10-15 01:31:16,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187213526] [2019-10-15 01:31:16,373 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 [2019-10-15 01:31:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:16,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:31:16,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:31:16,511 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:31:16,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254936945] [2019-10-15 01:31:16,601 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 01:31:16,601 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:16,616 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:16,627 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:16,627 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:16,847 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-10-15 01:31:17,451 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:17,488 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:31:17,495 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:17,848 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:17,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:31:17,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483988361] [2019-10-15 01:31:17,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:31:17,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:17,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:31:17,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:31:17,853 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 17 states. [2019-10-15 01:31:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:18,283 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2019-10-15 01:31:18,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-15 01:31:18,284 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2019-10-15 01:31:18,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:18,286 INFO L225 Difference]: With dead ends: 59 [2019-10-15 01:31:18,286 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:31:18,288 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:31:18,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:31:18,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-15 01:31:18,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-15 01:31:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2019-10-15 01:31:18,296 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 32 [2019-10-15 01:31:18,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:18,297 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2019-10-15 01:31:18,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:31:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2019-10-15 01:31:18,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:31:18,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:18,298 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:18,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:18,503 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:18,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1126249689, now seen corresponding path program 2 times [2019-10-15 01:31:18,504 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:18,504 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342617416] [2019-10-15 01:31:18,505 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:18,505 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:18,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:31:18,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342617416] [2019-10-15 01:31:18,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771851490] [2019-10-15 01:31:18,611 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 [2019-10-15 01:31:18,696 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:31:18,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:18,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:31:18,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:31:18,735 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:31:18,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1478268366] [2019-10-15 01:31:18,771 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 01:31:18,771 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:18,772 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:18,772 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:18,772 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:18,820 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-10-15 01:31:19,359 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:19,376 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:31:19,384 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:19,740 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:19,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 11] total 18 [2019-10-15 01:31:19,741 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167104734] [2019-10-15 01:31:19,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:31:19,742 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:19,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:31:19,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:31:19,743 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 18 states. [2019-10-15 01:31:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:20,162 INFO L93 Difference]: Finished difference Result 67 states and 95 transitions. [2019-10-15 01:31:20,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 01:31:20,163 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2019-10-15 01:31:20,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:20,164 INFO L225 Difference]: With dead ends: 67 [2019-10-15 01:31:20,164 INFO L226 Difference]: Without dead ends: 44 [2019-10-15 01:31:20,165 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:31:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-15 01:31:20,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-15 01:31:20,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 01:31:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-10-15 01:31:20,179 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 33 [2019-10-15 01:31:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:20,180 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-10-15 01:31:20,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:31:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-10-15 01:31:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 01:31:20,181 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:20,181 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:20,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:20,389 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:20,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1666989621, now seen corresponding path program 3 times [2019-10-15 01:31:20,391 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:20,391 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835017204] [2019-10-15 01:31:20,391 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:20,392 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:20,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:22,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835017204] [2019-10-15 01:31:22,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987567811] [2019-10-15 01:31:22,456 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 [2019-10-15 01:31:22,543 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:31:22,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:22,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 90 conjunts are in the unsatisfiable core [2019-10-15 01:31:22,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:31:23,615 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:31:25,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [227127328] [2019-10-15 01:31:25,522 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 01:31:25,522 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:25,523 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:25,523 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:25,523 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:25,558 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-10-15 01:31:25,882 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:25,896 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:31:25,899 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:26,852 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:26,852 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 30, 11] total 76 [2019-10-15 01:31:26,852 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669037705] [2019-10-15 01:31:26,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-10-15 01:31:26,854 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:26,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-10-15 01:31:26,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=5460, Unknown=0, NotChecked=0, Total=5700 [2019-10-15 01:31:26,857 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 76 states. [2019-10-15 01:31:29,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:29,786 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2019-10-15 01:31:29,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-15 01:31:29,786 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 43 [2019-10-15 01:31:29,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:29,788 INFO L225 Difference]: With dead ends: 77 [2019-10-15 01:31:29,789 INFO L226 Difference]: Without dead ends: 72 [2019-10-15 01:31:29,793 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 68 SyntacticMatches, 23 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=327, Invalid=7505, Unknown=0, NotChecked=0, Total=7832 [2019-10-15 01:31:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-15 01:31:29,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-10-15 01:31:29,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-15 01:31:29,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2019-10-15 01:31:29,803 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 43 [2019-10-15 01:31:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:29,804 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2019-10-15 01:31:29,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-10-15 01:31:29,804 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2019-10-15 01:31:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:31:29,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:29,806 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:30,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:30,009 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:30,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:30,010 INFO L82 PathProgramCache]: Analyzing trace with hash -893816937, now seen corresponding path program 4 times [2019-10-15 01:31:30,010 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:30,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426933369] [2019-10-15 01:31:30,010 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:30,011 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:30,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-15 01:31:30,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426933369] [2019-10-15 01:31:30,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604412382] [2019-10-15 01:31:30,074 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 [2019-10-15 01:31:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:30,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:31:30,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-15 01:31:30,233 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-15 01:31:30,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [979719286] [2019-10-15 01:31:30,271 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 01:31:30,272 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:30,273 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:30,273 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:30,274 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:30,297 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:31:30,579 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:30,613 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:31:30,617 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:30,979 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:30,980 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 23 [2019-10-15 01:31:30,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650256103] [2019-10-15 01:31:30,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:31:30,981 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:30,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:31:30,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:31:30,984 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 23 states. [2019-10-15 01:31:31,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:31,664 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2019-10-15 01:31:31,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:31:31,664 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2019-10-15 01:31:31,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:31,666 INFO L225 Difference]: With dead ends: 134 [2019-10-15 01:31:31,666 INFO L226 Difference]: Without dead ends: 71 [2019-10-15 01:31:31,668 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:31:31,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-15 01:31:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-10-15 01:31:31,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-15 01:31:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2019-10-15 01:31:31,678 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 44 [2019-10-15 01:31:31,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:31,678 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2019-10-15 01:31:31,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:31:31,678 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2019-10-15 01:31:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 01:31:31,680 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:31,680 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:31,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:31,884 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:31,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:31,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1998177506, now seen corresponding path program 5 times [2019-10-15 01:31:31,885 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:31,885 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400770701] [2019-10-15 01:31:31,886 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:31,886 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:31,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:31:31,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400770701] [2019-10-15 01:31:31,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876995094] [2019-10-15 01:31:31,950 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 [2019-10-15 01:31:32,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:31:32,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:32,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:31:32,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:31:32,191 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:31:32,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [468541025] [2019-10-15 01:31:32,260 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 01:31:32,260 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:32,261 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:32,261 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:32,262 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:32,287 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-10-15 01:31:32,588 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:32,604 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:31:32,611 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:33,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:33,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 11] total 26 [2019-10-15 01:31:33,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385542727] [2019-10-15 01:31:33,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:31:33,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:33,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:31:33,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:31:33,082 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand 26 states. [2019-10-15 01:31:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:33,912 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2019-10-15 01:31:33,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 01:31:33,913 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 45 [2019-10-15 01:31:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:33,914 INFO L225 Difference]: With dead ends: 110 [2019-10-15 01:31:33,914 INFO L226 Difference]: Without dead ends: 55 [2019-10-15 01:31:33,916 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 01:31:33,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-15 01:31:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-10-15 01:31:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-15 01:31:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2019-10-15 01:31:33,923 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 45 [2019-10-15 01:31:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:33,924 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2019-10-15 01:31:33,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:31:33,924 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2019-10-15 01:31:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-15 01:31:33,925 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:33,925 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:34,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:34,129 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:34,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:34,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1338189056, now seen corresponding path program 6 times [2019-10-15 01:31:34,130 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:34,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109383070] [2019-10-15 01:31:34,131 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:34,131 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:34,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:35,094 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 28 [2019-10-15 01:31:35,300 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 29 [2019-10-15 01:31:35,473 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 26 [2019-10-15 01:31:35,682 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 34 [2019-10-15 01:31:35,945 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 38 [2019-10-15 01:31:36,168 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2019-10-15 01:31:36,373 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 34 [2019-10-15 01:31:36,598 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 36 [2019-10-15 01:31:36,840 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2019-10-15 01:31:37,076 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 39 [2019-10-15 01:31:37,281 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 34 [2019-10-15 01:31:37,482 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2019-10-15 01:31:37,702 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2019-10-15 01:31:37,941 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 39 [2019-10-15 01:31:38,145 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 36 [2019-10-15 01:31:38,356 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 38 [2019-10-15 01:31:38,564 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2019-10-15 01:31:38,776 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2019-10-15 01:31:38,991 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2019-10-15 01:31:39,180 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 37 [2019-10-15 01:31:39,385 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2019-10-15 01:31:39,580 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2019-10-15 01:31:39,860 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2019-10-15 01:31:40,041 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2019-10-15 01:31:40,294 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2019-10-15 01:31:40,454 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2019-10-15 01:31:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:41,254 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109383070] [2019-10-15 01:31:41,254 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763528764] [2019-10-15 01:31:41,255 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 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 [2019-10-15 01:31:41,407 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:31:41,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:41,411 WARN L254 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 130 conjunts are in the unsatisfiable core [2019-10-15 01:31:41,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:31:43,659 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:47,584 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 29 [2019-10-15 01:31:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:31:47,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1669844265] [2019-10-15 01:31:47,760 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 01:31:47,760 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:47,761 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:47,761 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:47,761 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:47,792 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:31:48,028 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:48,038 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:31:48,041 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:49,340 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:49,340 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 37, 40, 11] total 121 [2019-10-15 01:31:49,341 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661817348] [2019-10-15 01:31:49,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 121 states [2019-10-15 01:31:49,342 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:49,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2019-10-15 01:31:49,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=13941, Unknown=0, NotChecked=0, Total=14520 [2019-10-15 01:31:49,346 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 121 states.