/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_copyInitSum2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:23:02,348 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:23:02,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:23:02,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:23:02,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:23:02,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:23:02,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:23:02,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:23:02,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:23:02,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:23:02,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:23:02,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:23:02,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:23:02,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:23:02,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:23:02,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:23:02,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:23:02,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:23:02,420 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 01:23:02,433 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:23:02,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:23:02,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:23:02,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:23:02,435 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:23:02,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:23:02,436 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:23:02,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:23:02,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:23:02,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:23:02,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:23:02,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:23:02,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:23:02,437 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:23:02,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:23:02,437 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:23:02,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:23:02,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:23:02,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:23:02,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:23:02,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:23:02,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:23:02,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:23:02,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:23:02,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:23:02,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:23:02,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:23:02,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:23:02,440 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 01:23:02,749 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:23:02,770 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:23:02,774 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:23:02,776 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:23:02,776 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:23:02,777 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2019-11-07 01:23:02,858 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2af8e6aa/f6b7016e98d948e4becee66dff1043e1/FLAG0f24b2384 [2019-11-07 01:23:03,330 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:23:03,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2019-11-07 01:23:03,337 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2af8e6aa/f6b7016e98d948e4becee66dff1043e1/FLAG0f24b2384 [2019-11-07 01:23:03,696 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2af8e6aa/f6b7016e98d948e4becee66dff1043e1 [2019-11-07 01:23:03,724 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:23:03,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:23:03,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:23:03,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:23:03,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:23:03,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:03" (1/1) ... [2019-11-07 01:23:03,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64049ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:03, skipping insertion in model container [2019-11-07 01:23:03,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:03" (1/1) ... [2019-11-07 01:23:03,752 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:23:03,784 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:23:04,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:23:04,051 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:23:04,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:23:04,100 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:23:04,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:04 WrapperNode [2019-11-07 01:23:04,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:23:04,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:23:04,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:23:04,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:23:04,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:04" (1/1) ... [2019-11-07 01:23:04,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:04" (1/1) ... [2019-11-07 01:23:04,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:04" (1/1) ... [2019-11-07 01:23:04,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:04" (1/1) ... [2019-11-07 01:23:04,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:04" (1/1) ... [2019-11-07 01:23:04,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:04" (1/1) ... [2019-11-07 01:23:04,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:04" (1/1) ... [2019-11-07 01:23:04,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:23:04,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:23:04,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:23:04,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:23:04,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:04" (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 01:23:04,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:23:04,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:23:04,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:23:04,269 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:23:04,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:23:04,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:23:04,270 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:23:04,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:23:04,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:23:04,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:23:04,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:23:04,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:23:04,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:23:04,640 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:23:04,641 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-07 01:23:04,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:23:04 BoogieIcfgContainer [2019-11-07 01:23:04,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:23:04,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:23:04,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:23:04,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:23:04,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:23:03" (1/3) ... [2019-11-07 01:23:04,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5157e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:23:04, skipping insertion in model container [2019-11-07 01:23:04,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:04" (2/3) ... [2019-11-07 01:23:04,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5157e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:23:04, skipping insertion in model container [2019-11-07 01:23:04,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:23:04" (3/3) ... [2019-11-07 01:23:04,651 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-1.i [2019-11-07 01:23:04,660 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:23:04,671 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:23:04,683 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:23:04,719 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:23:04,720 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:23:04,720 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:23:04,720 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:23:04,720 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:23:04,721 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:23:04,721 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:23:04,721 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:23:04,744 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-07 01:23:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:23:04,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:04,753 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:04,756 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:04,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:04,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2065348534, now seen corresponding path program 1 times [2019-11-07 01:23:04,772 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:04,773 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681996242] [2019-11-07 01:23:04,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:04,923 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 01:23:04,924 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681996242] [2019-11-07 01:23:04,925 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:23:04,926 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:23:04,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648415457] [2019-11-07 01:23:04,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:23:04,932 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:23:04,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:23:04,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:23:04,946 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-07 01:23:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:23:05,013 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2019-11-07 01:23:05,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:23:05,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 01:23:05,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:23:05,026 INFO L225 Difference]: With dead ends: 37 [2019-11-07 01:23:05,027 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 01:23:05,030 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 01:23:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 01:23:05,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 01:23:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 01:23:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-07 01:23:05,078 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2019-11-07 01:23:05,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:23:05,079 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-07 01:23:05,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:23:05,080 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-07 01:23:05,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 01:23:05,083 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:05,083 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:05,084 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:05,085 INFO L82 PathProgramCache]: Analyzing trace with hash 465570675, now seen corresponding path program 1 times [2019-11-07 01:23:05,085 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:05,086 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031829667] [2019-11-07 01:23:05,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:23:05,202 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031829667] [2019-11-07 01:23:05,203 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585186365] [2019-11-07 01:23:05,203 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 01:23:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:05,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:23:05,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:23:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:23:05,300 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:23:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:23:05,332 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [193523794] [2019-11-07 01:23:05,360 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:23:05,360 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:23:05,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:23:05,375 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:23:05,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:23:05,511 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:23:06,167 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:23:06,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:23:06,183 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:23:06,601 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:23:06,602 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-11-07 01:23:06,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831810910] [2019-11-07 01:23:06,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:23:06,607 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:23:06,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:23:06,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:23:06,613 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 17 states. [2019-11-07 01:23:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:23:07,557 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2019-11-07 01:23:07,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:23:07,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2019-11-07 01:23:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:23:07,559 INFO L225 Difference]: With dead ends: 51 [2019-11-07 01:23:07,559 INFO L226 Difference]: Without dead ends: 38 [2019-11-07 01:23:07,562 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:23:07,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-07 01:23:07,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2019-11-07 01:23:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 01:23:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-11-07 01:23:07,576 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 16 [2019-11-07 01:23:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:23:07,576 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-11-07 01:23:07,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:23:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-11-07 01:23:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 01:23:07,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:07,582 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:07,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:23:07,786 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:07,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:07,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1023729270, now seen corresponding path program 2 times [2019-11-07 01:23:07,787 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:07,787 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936529775] [2019-11-07 01:23:07,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 01:23:07,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936529775] [2019-11-07 01:23:07,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356723386] [2019-11-07 01:23:07,934 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 01:23:07,997 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:23:07,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:23:07,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:23:08,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:23:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 01:23:08,011 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:23:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 01:23:08,068 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [470889073] [2019-11-07 01:23:08,070 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:23:08,070 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:23:08,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:23:08,071 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:23:08,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:23:08,094 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:23:08,575 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:23:08,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:23:08,584 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:23:08,918 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:23:08,918 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-11-07 01:23:08,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277612011] [2019-11-07 01:23:08,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:23:08,920 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:23:08,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:23:08,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:23:08,920 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 23 states. [2019-11-07 01:23:10,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:23:10,024 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2019-11-07 01:23:10,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:23:10,025 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2019-11-07 01:23:10,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:23:10,026 INFO L225 Difference]: With dead ends: 75 [2019-11-07 01:23:10,026 INFO L226 Difference]: Without dead ends: 56 [2019-11-07 01:23:10,028 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:23:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-07 01:23:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-11-07 01:23:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-07 01:23:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-11-07 01:23:10,040 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 25 [2019-11-07 01:23:10,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:23:10,041 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-11-07 01:23:10,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:23:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-11-07 01:23:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-07 01:23:10,042 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:10,043 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:10,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:23:10,249 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:10,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:10,250 INFO L82 PathProgramCache]: Analyzing trace with hash -173978774, now seen corresponding path program 3 times [2019-11-07 01:23:10,250 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:10,250 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001467711] [2019-11-07 01:23:10,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-07 01:23:10,476 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001467711] [2019-11-07 01:23:10,476 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119100790] [2019-11-07 01:23:10,476 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 01:23:10,543 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:23:10,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:23:10,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:23:10,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:23:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-07 01:23:10,563 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:23:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-07 01:23:10,836 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115085494] [2019-11-07 01:23:10,837 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:23:10,837 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:23:10,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:23:10,838 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:23:10,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:23:10,865 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:23:11,168 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:23:11,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:23:11,178 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:23:11,525 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:23:11,525 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-11-07 01:23:11,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249860789] [2019-11-07 01:23:11,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:23:11,528 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:23:11,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:23:11,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:23:11,529 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 35 states. [2019-11-07 01:23:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:23:13,808 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2019-11-07 01:23:13,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:23:13,810 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2019-11-07 01:23:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:23:13,812 INFO L225 Difference]: With dead ends: 123 [2019-11-07 01:23:13,812 INFO L226 Difference]: Without dead ends: 92 [2019-11-07 01:23:13,814 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:23:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-07 01:23:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2019-11-07 01:23:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-07 01:23:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2019-11-07 01:23:13,829 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 43 [2019-11-07 01:23:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:23:13,829 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2019-11-07 01:23:13,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:23:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2019-11-07 01:23:13,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-07 01:23:13,832 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:13,832 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:14,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:23:14,036 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:14,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:14,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1373570858, now seen corresponding path program 4 times [2019-11-07 01:23:14,037 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:14,037 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970872571] [2019-11-07 01:23:14,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-11-07 01:23:14,482 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970872571] [2019-11-07 01:23:14,482 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241290327] [2019-11-07 01:23:14,482 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 01:23:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:14,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:23:14,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:23:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-11-07 01:23:14,618 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:23:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-11-07 01:23:15,357 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724914300] [2019-11-07 01:23:15,359 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:23:15,359 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:23:15,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:23:15,359 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:23:15,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:23:15,381 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:23:15,707 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:23:15,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:23:15,715 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:23:16,155 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:23:16,156 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-11-07 01:23:16,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960850416] [2019-11-07 01:23:16,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:23:16,158 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:23:16,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:23:16,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:23:16,161 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 59 states. [2019-11-07 01:23:17,976 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2019-11-07 01:23:21,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:23:21,387 INFO L93 Difference]: Finished difference Result 219 states and 296 transitions. [2019-11-07 01:23:21,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:23:21,387 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 79 [2019-11-07 01:23:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:23:21,390 INFO L225 Difference]: With dead ends: 219 [2019-11-07 01:23:21,390 INFO L226 Difference]: Without dead ends: 164 [2019-11-07 01:23:21,394 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:23:21,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-07 01:23:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2019-11-07 01:23:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-11-07 01:23:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2019-11-07 01:23:21,419 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 79 [2019-11-07 01:23:21,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:23:21,420 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2019-11-07 01:23:21,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:23:21,420 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2019-11-07 01:23:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-07 01:23:21,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:23:21,425 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:23:21,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:23:21,632 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:23:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:23:21,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1915231914, now seen corresponding path program 5 times [2019-11-07 01:23:21,632 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:23:21,633 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725620706] [2019-11-07 01:23:21,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:23:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:23:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2019-11-07 01:23:22,813 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725620706] [2019-11-07 01:23:22,813 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922192880] [2019-11-07 01:23:22,814 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