/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:24:45,705 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:24:45,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:24:45,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:24:45,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:24:45,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:24:45,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:24:45,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:24:45,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:24:45,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:24:45,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:24:45,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:24:45,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:24:45,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:24:45,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:24:45,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:24:45,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:24:45,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:24:45,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 01:24:45,782 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:24:45,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:24:45,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:24:45,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:24:45,785 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:24:45,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:24:45,786 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:24:45,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:24:45,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:24:45,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:24:45,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:24:45,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:24:45,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:24:45,789 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:24:45,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:24:45,789 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:24:45,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:24:45,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:24:45,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:24:45,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:24:45,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:24:45,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:24:45,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:24:45,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:24:45,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:24:45,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:24:45,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:24:45,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:24:45,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:24:46,120 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:24:46,144 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:24:46,148 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:24:46,149 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:24:46,150 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:24:46,150 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2019-11-07 01:24:46,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf98fe28/f62781f3697248dcb102924c9d34e8d3/FLAG6d033ee2c [2019-11-07 01:24:46,694 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:24:46,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2019-11-07 01:24:46,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf98fe28/f62781f3697248dcb102924c9d34e8d3/FLAG6d033ee2c [2019-11-07 01:24:47,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf98fe28/f62781f3697248dcb102924c9d34e8d3 [2019-11-07 01:24:47,121 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:24:47,125 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:24:47,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:47,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:24:47,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:24:47,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:47" (1/1) ... [2019-11-07 01:24:47,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc6d529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:47, skipping insertion in model container [2019-11-07 01:24:47,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:47" (1/1) ... [2019-11-07 01:24:47,173 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:24:47,212 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:24:47,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:47,446 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:24:47,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:47,487 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:24:47,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:47 WrapperNode [2019-11-07 01:24:47,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:47,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:24:47,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:24:47,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:24:47,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:47" (1/1) ... [2019-11-07 01:24:47,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:47" (1/1) ... [2019-11-07 01:24:47,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:47" (1/1) ... [2019-11-07 01:24:47,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:47" (1/1) ... [2019-11-07 01:24:47,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:47" (1/1) ... [2019-11-07 01:24:47,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:47" (1/1) ... [2019-11-07 01:24:47,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:47" (1/1) ... [2019-11-07 01:24:47,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:24:47,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:24:47,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:24:47,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:24:47,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:24:47,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:24:47,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:24:47,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:24:47,687 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:24:47,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:24:47,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:24:47,687 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:24:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:24:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:24:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:24:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:24:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:24:47,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:24:48,092 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:24:48,092 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-07 01:24:48,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:48 BoogieIcfgContainer [2019-11-07 01:24:48,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:24:48,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:24:48,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:24:48,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:24:48,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:24:47" (1/3) ... [2019-11-07 01:24:48,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e80fa54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:48, skipping insertion in model container [2019-11-07 01:24:48,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:47" (2/3) ... [2019-11-07 01:24:48,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e80fa54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:48, skipping insertion in model container [2019-11-07 01:24:48,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:48" (3/3) ... [2019-11-07 01:24:48,103 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2019-11-07 01:24:48,113 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:24:48,122 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:24:48,134 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:24:48,159 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:24:48,160 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:24:48,160 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:24:48,160 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:24:48,161 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:24:48,161 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:24:48,162 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:24:48,162 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:24:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-07 01:24:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 01:24:48,183 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:48,184 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:48,186 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:48,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2120380695, now seen corresponding path program 1 times [2019-11-07 01:24:48,201 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:48,202 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076945821] [2019-11-07 01:24:48,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:24:48,372 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076945821] [2019-11-07 01:24:48,373 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:24:48,373 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:24:48,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241939747] [2019-11-07 01:24:48,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:24:48,380 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:48,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:24:48,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:24:48,400 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-07 01:24:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:48,539 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2019-11-07 01:24:48,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:24:48,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-07 01:24:48,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:48,556 INFO L225 Difference]: With dead ends: 46 [2019-11-07 01:24:48,556 INFO L226 Difference]: Without dead ends: 26 [2019-11-07 01:24:48,562 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:24:48,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-07 01:24:48,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-07 01:24:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-07 01:24:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-07 01:24:48,620 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 16 [2019-11-07 01:24:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:48,621 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-07 01:24:48,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:24:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-07 01:24:48,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-07 01:24:48,624 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:48,624 INFO L410 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] [2019-11-07 01:24:48,625 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:48,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1248295838, now seen corresponding path program 1 times [2019-11-07 01:24:48,626 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:48,626 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147296339] [2019-11-07 01:24:48,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:24:48,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147296339] [2019-11-07 01:24:48,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565606272] [2019-11-07 01:24:48,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:48,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:24:48,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:24:48,884 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:24:48,924 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1955611654] [2019-11-07 01:24:48,969 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-07 01:24:48,972 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:48,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:48,997 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:48,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:49,122 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:49,971 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:49,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:49,982 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:50,395 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:50,395 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-11-07 01:24:50,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437542098] [2019-11-07 01:24:50,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:24:50,400 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:50,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:24:50,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:24:50,401 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 17 states. [2019-11-07 01:24:51,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:51,169 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2019-11-07 01:24:51,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:24:51,169 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2019-11-07 01:24:51,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:51,171 INFO L225 Difference]: With dead ends: 72 [2019-11-07 01:24:51,171 INFO L226 Difference]: Without dead ends: 53 [2019-11-07 01:24:51,173 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:24:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-07 01:24:51,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2019-11-07 01:24:51,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-07 01:24:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-11-07 01:24:51,196 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 22 [2019-11-07 01:24:51,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:51,196 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-11-07 01:24:51,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:24:51,196 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-11-07 01:24:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-07 01:24:51,201 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:51,201 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:51,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:51,402 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:51,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1543679785, now seen corresponding path program 2 times [2019-11-07 01:24:51,403 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:51,403 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903010626] [2019-11-07 01:24:51,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-07 01:24:51,574 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903010626] [2019-11-07 01:24:51,574 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394714575] [2019-11-07 01:24:51,574 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:51,666 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:24:51,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:24:51,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:24:51,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-07 01:24:51,691 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-07 01:24:51,766 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1632447714] [2019-11-07 01:24:51,768 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-07 01:24:51,768 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:51,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:51,771 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:51,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:51,823 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:52,369 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:52,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:52,382 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:52,736 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:52,736 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-11-07 01:24:52,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302798682] [2019-11-07 01:24:52,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:24:52,738 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:52,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:24:52,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:24:52,739 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 23 states. [2019-11-07 01:24:53,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:53,960 INFO L93 Difference]: Finished difference Result 123 states and 170 transitions. [2019-11-07 01:24:53,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:24:53,961 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2019-11-07 01:24:53,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:53,962 INFO L225 Difference]: With dead ends: 123 [2019-11-07 01:24:53,963 INFO L226 Difference]: Without dead ends: 89 [2019-11-07 01:24:53,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:24:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-07 01:24:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2019-11-07 01:24:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-07 01:24:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2019-11-07 01:24:54,008 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 40 [2019-11-07 01:24:54,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:54,008 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2019-11-07 01:24:54,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:24:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2019-11-07 01:24:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-07 01:24:54,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:54,015 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:54,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:54,220 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:54,221 INFO L82 PathProgramCache]: Analyzing trace with hash 376036471, now seen corresponding path program 3 times [2019-11-07 01:24:54,221 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:54,221 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107663953] [2019-11-07 01:24:54,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-11-07 01:24:54,502 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107663953] [2019-11-07 01:24:54,502 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529926298] [2019-11-07 01:24:54,502 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:54,617 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:24:54,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:24:54,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:24:54,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-11-07 01:24:54,652 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-11-07 01:24:54,895 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1224926027] [2019-11-07 01:24:54,901 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-07 01:24:54,901 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:54,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:54,904 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:54,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:54,923 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:55,366 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:55,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:55,374 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:55,754 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:55,754 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-11-07 01:24:55,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553819846] [2019-11-07 01:24:55,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:24:55,757 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:55,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:24:55,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:24:55,759 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 35 states. [2019-11-07 01:24:57,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:57,950 INFO L93 Difference]: Finished difference Result 225 states and 308 transitions. [2019-11-07 01:24:57,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:24:57,956 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2019-11-07 01:24:57,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:57,958 INFO L225 Difference]: With dead ends: 225 [2019-11-07 01:24:57,959 INFO L226 Difference]: Without dead ends: 161 [2019-11-07 01:24:57,963 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:24:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-07 01:24:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 152. [2019-11-07 01:24:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-11-07 01:24:57,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 158 transitions. [2019-11-07 01:24:57,998 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 158 transitions. Word has length 76 [2019-11-07 01:24:57,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:57,999 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 158 transitions. [2019-11-07 01:24:57,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:24:57,999 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 158 transitions. [2019-11-07 01:24:58,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-07 01:24:58,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:58,002 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:58,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:58,211 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:58,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:58,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1663159223, now seen corresponding path program 4 times [2019-11-07 01:24:58,213 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:58,214 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836502642] [2019-11-07 01:24:58,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-11-07 01:24:58,716 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836502642] [2019-11-07 01:24:58,716 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734616079] [2019-11-07 01:24:58,716 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:58,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:24:58,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-11-07 01:24:58,905 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-11-07 01:24:59,623 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [607280464] [2019-11-07 01:24:59,625 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-07 01:24:59,625 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:59,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:59,626 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:59,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:59,648 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:00,003 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:25:00,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:00,014 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:00,419 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:00,419 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-11-07 01:25:00,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422143163] [2019-11-07 01:25:00,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:25:00,422 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:00,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:25:00,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:25:00,425 INFO L87 Difference]: Start difference. First operand 152 states and 158 transitions. Second operand 59 states. [2019-11-07 01:25:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:06,517 INFO L93 Difference]: Finished difference Result 429 states and 584 transitions. [2019-11-07 01:25:06,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:25:06,518 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 148 [2019-11-07 01:25:06,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:06,526 INFO L225 Difference]: With dead ends: 429 [2019-11-07 01:25:06,526 INFO L226 Difference]: Without dead ends: 305 [2019-11-07 01:25:06,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:25:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-11-07 01:25:06,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 296. [2019-11-07 01:25:06,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2019-11-07 01:25:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 302 transitions. [2019-11-07 01:25:06,608 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 302 transitions. Word has length 148 [2019-11-07 01:25:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:06,610 INFO L462 AbstractCegarLoop]: Abstraction has 296 states and 302 transitions. [2019-11-07 01:25:06,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:25:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 302 transitions. [2019-11-07 01:25:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-11-07 01:25:06,624 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:06,624 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:06,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:06,841 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:06,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:06,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1615525321, now seen corresponding path program 5 times [2019-11-07 01:25:06,842 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:06,842 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122597947] [2019-11-07 01:25:06,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2019-11-07 01:25:08,354 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122597947] [2019-11-07 01:25:08,354 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072036753] [2019-11-07 01:25:08,354 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