/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-programs/copysome2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:31:20,836 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:31:20,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:31:20,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:31:20,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:31:20,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:31:20,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:31:20,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:31:20,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:31:20,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:31:20,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:31:20,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:31:20,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:31:20,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:31:20,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:31:20,936 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 01:31:20,956 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:31:20,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:31:20,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:31:20,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:31:20,959 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:31:20,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:31:20,959 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:31:20,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:31:20,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:31:20,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:31:20,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:31:20,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:31:20,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:31:20,962 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:31:20,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:31:20,962 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:31:20,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:31:20,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:31:20,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:31:20,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:31:20,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:31:20,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:31:20,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:31:20,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:31:20,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:31:20,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:31:20,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:31:20,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:31:20,965 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 01:31:21,288 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:31:21,303 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:31:21,307 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:31:21,309 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:31:21,309 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:31:21,310 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome2-1.i [2019-11-07 01:31:21,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0641303c5/77b58cc94c9747fba9a7a73f70240ed3/FLAGeea7efd3c [2019-11-07 01:31:21,854 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:31:21,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome2-1.i [2019-11-07 01:31:21,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0641303c5/77b58cc94c9747fba9a7a73f70240ed3/FLAGeea7efd3c [2019-11-07 01:31:22,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0641303c5/77b58cc94c9747fba9a7a73f70240ed3 [2019-11-07 01:31:22,248 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:31:22,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:31:22,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:31:22,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:31:22,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:31:22,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:22" (1/1) ... [2019-11-07 01:31:22,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d3df3f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:22, skipping insertion in model container [2019-11-07 01:31:22,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:22" (1/1) ... [2019-11-07 01:31:22,309 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:31:22,333 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:31:22,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:31:22,571 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:31:22,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:31:22,616 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:31:22,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:22 WrapperNode [2019-11-07 01:31:22,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:31:22,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:31:22,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:31:22,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:31:22,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:22" (1/1) ... [2019-11-07 01:31:22,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:22" (1/1) ... [2019-11-07 01:31:22,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:22" (1/1) ... [2019-11-07 01:31:22,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:22" (1/1) ... [2019-11-07 01:31:22,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:22" (1/1) ... [2019-11-07 01:31:22,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:22" (1/1) ... [2019-11-07 01:31:22,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:22" (1/1) ... [2019-11-07 01:31:22,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:31:22,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:31:22,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:31:22,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:31:22,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:22" (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 01:31:22,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:31:22,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:31:22,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:31:22,811 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:31:22,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:31:22,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:31:22,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:31:22,812 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:31:22,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:31:22,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:31:22,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:31:22,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:31:22,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:31:22,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:31:23,301 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:31:23,301 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-07 01:31:23,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:23 BoogieIcfgContainer [2019-11-07 01:31:23,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:31:23,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:31:23,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:31:23,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:31:23,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:31:22" (1/3) ... [2019-11-07 01:31:23,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5053441a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:31:23, skipping insertion in model container [2019-11-07 01:31:23,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:22" (2/3) ... [2019-11-07 01:31:23,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5053441a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:31:23, skipping insertion in model container [2019-11-07 01:31:23,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:23" (3/3) ... [2019-11-07 01:31:23,311 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome2-1.i [2019-11-07 01:31:23,319 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:31:23,328 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:31:23,340 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:31:23,364 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:31:23,364 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:31:23,364 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:31:23,364 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:31:23,365 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:31:23,365 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:31:23,365 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:31:23,365 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:31:23,380 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-07 01:31:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:31:23,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:23,387 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:23,389 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:23,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:23,395 INFO L82 PathProgramCache]: Analyzing trace with hash -29131444, now seen corresponding path program 1 times [2019-11-07 01:31:23,405 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:23,405 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159927882] [2019-11-07 01:31:23,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:23,584 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 01:31:23,585 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159927882] [2019-11-07 01:31:23,586 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:31:23,586 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:31:23,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089841521] [2019-11-07 01:31:23,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:31:23,592 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:31:23,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:31:23,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:31:23,610 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-07 01:31:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:31:23,681 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2019-11-07 01:31:23,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:31:23,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 01:31:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:31:23,692 INFO L225 Difference]: With dead ends: 37 [2019-11-07 01:31:23,693 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 01:31:23,696 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 01:31:23,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 01:31:23,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 01:31:23,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 01:31:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-07 01:31:23,736 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2019-11-07 01:31:23,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:31:23,737 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-07 01:31:23,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:31:23,738 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-07 01:31:23,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 01:31:23,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:23,739 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:23,739 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:23,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:23,740 INFO L82 PathProgramCache]: Analyzing trace with hash 762072982, now seen corresponding path program 1 times [2019-11-07 01:31:23,740 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:23,740 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554836443] [2019-11-07 01:31:23,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:23,853 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 01:31:23,854 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554836443] [2019-11-07 01:31:23,854 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813325637] [2019-11-07 01:31:23,855 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 01:31:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:23,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:31:23,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:31:23,993 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 01:31:23,993 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:31:24,039 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 01:31:24,040 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1706876455] [2019-11-07 01:31:24,076 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:31:24,076 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:31:24,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:31:24,092 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:31:24,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:31:24,264 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:31:24,663 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2019-11-07 01:31:25,194 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:31:25,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:31:25,204 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:31:25,467 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:31:25,467 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-11-07 01:31:25,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685921509] [2019-11-07 01:31:25,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:31:25,470 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:31:25,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:31:25,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:31:25,472 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 17 states. [2019-11-07 01:31:26,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:31:26,140 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2019-11-07 01:31:26,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:31:26,141 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2019-11-07 01:31:26,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:31:26,142 INFO L225 Difference]: With dead ends: 51 [2019-11-07 01:31:26,142 INFO L226 Difference]: Without dead ends: 38 [2019-11-07 01:31:26,144 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:31:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-07 01:31:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2019-11-07 01:31:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 01:31:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-11-07 01:31:26,154 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 16 [2019-11-07 01:31:26,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:31:26,154 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-11-07 01:31:26,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:31:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-11-07 01:31:26,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 01:31:26,156 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:26,156 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:26,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:31:26,365 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:26,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:26,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1611920692, now seen corresponding path program 2 times [2019-11-07 01:31:26,367 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:26,369 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700457229] [2019-11-07 01:31:26,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:26,567 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 01:31:26,567 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700457229] [2019-11-07 01:31:26,568 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077947768] [2019-11-07 01:31:26,568 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 01:31:26,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:31:26,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:31:26,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:31:26,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:31:26,688 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 01:31:26,688 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:31:26,746 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 01:31:26,746 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881760075] [2019-11-07 01:31:26,748 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:31:26,748 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:31:26,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:31:26,749 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:31:26,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:31:26,776 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:31:26,982 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2019-11-07 01:31:27,375 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:31:27,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:31:27,384 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:31:27,609 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:31:27,609 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-11-07 01:31:27,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135584527] [2019-11-07 01:31:27,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:31:27,611 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:31:27,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:31:27,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:31:27,612 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 23 states. [2019-11-07 01:31:28,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:31:28,484 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2019-11-07 01:31:28,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:31:28,486 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2019-11-07 01:31:28,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:31:28,487 INFO L225 Difference]: With dead ends: 75 [2019-11-07 01:31:28,487 INFO L226 Difference]: Without dead ends: 56 [2019-11-07 01:31:28,488 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:31:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-07 01:31:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-11-07 01:31:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-07 01:31:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-11-07 01:31:28,500 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 25 [2019-11-07 01:31:28,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:31:28,500 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-11-07 01:31:28,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:31:28,501 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-11-07 01:31:28,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-07 01:31:28,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:28,502 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:28,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:31:28,706 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:28,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:28,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1819326220, now seen corresponding path program 3 times [2019-11-07 01:31:28,707 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:28,707 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579267664] [2019-11-07 01:31:28,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:29,070 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 01:31:29,071 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579267664] [2019-11-07 01:31:29,071 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20800148] [2019-11-07 01:31:29,071 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 01:31:29,169 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:31:29,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:31:29,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:31:29,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:31:29,190 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 01:31:29,191 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:31:29,384 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 01:31:29,384 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2144261434] [2019-11-07 01:31:29,385 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:31:29,386 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:31:29,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:31:29,386 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:31:29,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:31:29,405 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:31:29,931 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:31:29,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:31:29,938 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:31:30,209 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:31:30,210 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-11-07 01:31:30,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955007564] [2019-11-07 01:31:30,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:31:30,211 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:31:30,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:31:30,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:31:30,212 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 35 states. [2019-11-07 01:31:31,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:31:31,919 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2019-11-07 01:31:31,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:31:31,919 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2019-11-07 01:31:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:31:31,921 INFO L225 Difference]: With dead ends: 123 [2019-11-07 01:31:31,921 INFO L226 Difference]: Without dead ends: 92 [2019-11-07 01:31:31,924 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=979, Invalid=3053, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:31:31,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-07 01:31:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2019-11-07 01:31:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-07 01:31:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2019-11-07 01:31:31,939 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 43 [2019-11-07 01:31:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:31:31,940 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2019-11-07 01:31:31,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:31:31,940 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2019-11-07 01:31:31,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-07 01:31:31,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:31,943 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:32,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:31:32,147 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:32,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:32,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1941864564, now seen corresponding path program 4 times [2019-11-07 01:31:32,148 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:32,149 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397224682] [2019-11-07 01:31:32,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:32,871 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 01:31:32,872 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397224682] [2019-11-07 01:31:32,872 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725643708] [2019-11-07 01:31:32,872 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 01:31:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:33,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:31:33,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:31:33,023 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 01:31:33,024 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:31:33,728 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 01:31:33,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1027865747] [2019-11-07 01:31:33,729 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:31:33,730 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:31:33,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:31:33,730 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:31:33,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:31:33,755 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:31:34,231 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:31:34,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:31:34,241 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:31:34,568 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:31:34,568 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-11-07 01:31:34,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516626455] [2019-11-07 01:31:34,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:31:34,569 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:31:34,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:31:34,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=2216, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:31:34,572 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 59 states. [2019-11-07 01:31:38,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:31:38,499 INFO L93 Difference]: Finished difference Result 219 states and 296 transitions. [2019-11-07 01:31:38,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:31:38,500 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 79 [2019-11-07 01:31:38,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:31:38,502 INFO L225 Difference]: With dead ends: 219 [2019-11-07 01:31:38,502 INFO L226 Difference]: Without dead ends: 164 [2019-11-07 01:31:38,508 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3607, Invalid=8825, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:31:38,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-07 01:31:38,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2019-11-07 01:31:38,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-11-07 01:31:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2019-11-07 01:31:38,539 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 79 [2019-11-07 01:31:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:31:38,539 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2019-11-07 01:31:38,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:31:38,539 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2019-11-07 01:31:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-07 01:31:38,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:38,542 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:38,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:31:38,746 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:38,747 INFO L82 PathProgramCache]: Analyzing trace with hash 908120204, now seen corresponding path program 5 times [2019-11-07 01:31:38,747 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:38,750 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614708468] [2019-11-07 01:31:38,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:40,500 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 01:31:40,501 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614708468] [2019-11-07 01:31:40,501 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633934355] [2019-11-07 01:31:40,501 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