/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-industry-pattern/array_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:28:52,454 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:28:52,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:28:52,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:28:52,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:28:52,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:28:52,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:28:52,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:28:52,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:28:52,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:28:52,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:28:52,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:28:52,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:28:52,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:28:52,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:28:52,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:28:52,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:28:52,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:28:52,546 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 01:28:52,569 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:28:52,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:28:52,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:28:52,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:28:52,572 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:28:52,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:28:52,573 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:28:52,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:28:52,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:28:52,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:28:52,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:28:52,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:28:52,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:28:52,576 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:28:52,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:28:52,576 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:28:52,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:28:52,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:28:52,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:28:52,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:28:52,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:28:52,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:28:52,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:28:52,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:28:52,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:28:52,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:28:52,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:28:52,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:28:52,579 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 01:28:52,901 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:28:52,922 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:28:52,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:28:52,927 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:28:52,928 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:28:52,928 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2019-11-07 01:28:53,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6317dc051/00ac73bbf32e4306869e9778aec9a5b8/FLAGbbe6ad1d3 [2019-11-07 01:28:53,497 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:28:53,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2019-11-07 01:28:53,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6317dc051/00ac73bbf32e4306869e9778aec9a5b8/FLAGbbe6ad1d3 [2019-11-07 01:28:53,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6317dc051/00ac73bbf32e4306869e9778aec9a5b8 [2019-11-07 01:28:53,910 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:28:53,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:28:53,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:28:53,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:28:53,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:28:53,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:53" (1/1) ... [2019-11-07 01:28:53,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58706db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:53, skipping insertion in model container [2019-11-07 01:28:53,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:53" (1/1) ... [2019-11-07 01:28:53,929 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:28:53,949 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:28:54,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:28:54,142 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:28:54,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:28:54,266 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:28:54,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54 WrapperNode [2019-11-07 01:28:54,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:28:54,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:28:54,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:28:54,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:28:54,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2019-11-07 01:28:54,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2019-11-07 01:28:54,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2019-11-07 01:28:54,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2019-11-07 01:28:54,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2019-11-07 01:28:54,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2019-11-07 01:28:54,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (1/1) ... [2019-11-07 01:28:54,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:28:54,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:28:54,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:28:54,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:28:54,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (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 01:28:54,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:28:54,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:28:54,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:28:54,375 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:28:54,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:28:54,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:28:54,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:28:54,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:28:54,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:28:54,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:28:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:28:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:28:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:28:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:28:54,860 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:28:54,860 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 01:28:54,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:54 BoogieIcfgContainer [2019-11-07 01:28:54,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:28:54,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:28:54,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:28:54,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:28:54,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:28:53" (1/3) ... [2019-11-07 01:28:54,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729d5b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:54, skipping insertion in model container [2019-11-07 01:28:54,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:54" (2/3) ... [2019-11-07 01:28:54,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729d5b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:54, skipping insertion in model container [2019-11-07 01:28:54,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:54" (3/3) ... [2019-11-07 01:28:54,869 INFO L109 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2019-11-07 01:28:54,878 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:28:54,886 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:28:54,897 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:28:54,920 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:28:54,920 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:28:54,920 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:28:54,920 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:28:54,920 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:28:54,921 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:28:54,921 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:28:54,921 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:28:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-07 01:28:54,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 01:28:54,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:54,939 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:54,941 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:54,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:54,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1264123479, now seen corresponding path program 1 times [2019-11-07 01:28:54,953 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:54,953 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054778594] [2019-11-07 01:28:54,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:55,120 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 01:28:55,120 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054778594] [2019-11-07 01:28:55,121 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:28:55,122 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:28:55,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777865767] [2019-11-07 01:28:55,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:28:55,128 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:55,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:28:55,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:28:55,144 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-07 01:28:55,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:55,220 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-07 01:28:55,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:28:55,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-07 01:28:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:55,230 INFO L225 Difference]: With dead ends: 38 [2019-11-07 01:28:55,230 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 01:28:55,233 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 01:28:55,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 01:28:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-07 01:28:55,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 01:28:55,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-07 01:28:55,270 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2019-11-07 01:28:55,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:55,271 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-07 01:28:55,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:28:55,271 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-07 01:28:55,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 01:28:55,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:55,272 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:55,273 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:55,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:55,273 INFO L82 PathProgramCache]: Analyzing trace with hash -392956526, now seen corresponding path program 1 times [2019-11-07 01:28:55,274 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:55,274 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653328810] [2019-11-07 01:28:55,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:28:55,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653328810] [2019-11-07 01:28:55,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283118835] [2019-11-07 01:28:55,385 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 01:28:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:55,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:28:55,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:55,477 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 01:28:55,477 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:55,513 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 01:28:55,514 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503565495] [2019-11-07 01:28:55,539 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:28:55,540 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:55,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:55,562 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:55,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:55,749 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:56,240 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:56,288 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:56,732 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:28:56,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:56,744 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:57,156 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2019-11-07 01:28:57,353 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2019-11-07 01:28:57,549 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:57,549 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-11-07 01:28:57,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578436961] [2019-11-07 01:28:57,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:28:57,553 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:57,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:28:57,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:28:57,556 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 18 states. [2019-11-07 01:28:57,846 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2019-11-07 01:28:58,006 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:28:58,135 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2019-11-07 01:28:58,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:58,727 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-11-07 01:28:58,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:28:58,727 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2019-11-07 01:28:58,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:58,729 INFO L225 Difference]: With dead ends: 44 [2019-11-07 01:28:58,730 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 01:28:58,731 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2019-11-07 01:28:58,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 01:28:58,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-11-07 01:28:58,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-07 01:28:58,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-07 01:28:58,739 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2019-11-07 01:28:58,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:58,740 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-07 01:28:58,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:28:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-07 01:28:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-07 01:28:58,741 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:58,741 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:58,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:58,951 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:58,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:58,952 INFO L82 PathProgramCache]: Analyzing trace with hash -127994615, now seen corresponding path program 2 times [2019-11-07 01:28:58,952 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:58,952 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844408423] [2019-11-07 01:28:58,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:28:59,084 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844408423] [2019-11-07 01:28:59,084 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527531997] [2019-11-07 01:28:59,085 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 01:28:59,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:28:59,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:28:59,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:28:59,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 01:28:59,228 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 01:28:59,317 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1546663367] [2019-11-07 01:28:59,318 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:28:59,319 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:59,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:59,321 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:59,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:59,351 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:59,534 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:28:59,906 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:29:00,065 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:29:00,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:00,073 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:00,417 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2019-11-07 01:29:00,563 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2019-11-07 01:29:00,737 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:29:00,737 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7, 11] total 24 [2019-11-07 01:29:00,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966020346] [2019-11-07 01:29:00,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-07 01:29:00,738 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:00,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-07 01:29:00,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:29:00,739 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 24 states. [2019-11-07 01:29:01,229 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:01,378 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:01,530 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:02,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:02,741 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2019-11-07 01:29:02,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:29:02,742 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 22 [2019-11-07 01:29:02,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:02,745 INFO L225 Difference]: With dead ends: 71 [2019-11-07 01:29:02,745 INFO L226 Difference]: Without dead ends: 55 [2019-11-07 01:29:02,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=364, Invalid=1276, Unknown=0, NotChecked=0, Total=1640 [2019-11-07 01:29:02,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-07 01:29:02,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2019-11-07 01:29:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-07 01:29:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-11-07 01:29:02,757 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 22 [2019-11-07 01:29:02,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:02,758 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-11-07 01:29:02,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-07 01:29:02,758 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-11-07 01:29:02,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-07 01:29:02,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:02,759 INFO L410 BasicCegarLoop]: trace histogram [10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:02,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:02,965 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:02,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:02,965 INFO L82 PathProgramCache]: Analyzing trace with hash 701320466, now seen corresponding path program 3 times [2019-11-07 01:29:02,965 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:02,966 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132483370] [2019-11-07 01:29:02,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:29:03,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132483370] [2019-11-07 01:29:03,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457546883] [2019-11-07 01:29:03,156 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 01:29:03,264 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:29:03,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:29:03,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:29:03,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:29:03,292 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:29:03,375 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1938536227] [2019-11-07 01:29:03,377 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:29:03,377 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:03,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:03,378 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:03,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:03,406 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:03,708 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:29:03,728 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:29:04,008 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:29:04,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:04,014 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:04,340 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2019-11-07 01:29:04,504 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2019-11-07 01:29:04,675 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:29:04,676 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 26 [2019-11-07 01:29:04,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103244258] [2019-11-07 01:29:04,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-07 01:29:04,678 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:04,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-07 01:29:04,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2019-11-07 01:29:04,679 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 26 states. [2019-11-07 01:29:04,948 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2019-11-07 01:29:05,088 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:05,212 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:05,503 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:05,635 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:05,772 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:05,924 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:06,086 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:06,227 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:06,370 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:06,511 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2019-11-07 01:29:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:07,192 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2019-11-07 01:29:07,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-07 01:29:07,194 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2019-11-07 01:29:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:07,196 INFO L225 Difference]: With dead ends: 92 [2019-11-07 01:29:07,197 INFO L226 Difference]: Without dead ends: 67 [2019-11-07 01:29:07,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=455, Invalid=1615, Unknown=0, NotChecked=0, Total=2070 [2019-11-07 01:29:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-07 01:29:07,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-07 01:29:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-07 01:29:07,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-11-07 01:29:07,213 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 37 [2019-11-07 01:29:07,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:07,213 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-11-07 01:29:07,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-07 01:29:07,214 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-11-07 01:29:07,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-07 01:29:07,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:07,216 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:07,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:07,420 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:07,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:07,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1216881623, now seen corresponding path program 4 times [2019-11-07 01:29:07,421 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:07,422 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872334935] [2019-11-07 01:29:07,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-07 01:29:07,664 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872334935] [2019-11-07 01:29:07,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384283450] [2019-11-07 01:29:07,665 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 01:29:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:07,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-07 01:29:07,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-07 01:29:07,805 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-07 01:29:08,083 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [217915830] [2019-11-07 01:29:08,085 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:29:08,085 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:08,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:08,086 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:08,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:08,107 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:08,188 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:29:08,349 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:29:08,655 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:29:08,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:08,665 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:09,376 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2019-11-07 01:29:09,546 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2019-11-07 01:29:09,735 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:29:09,735 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16, 11] total 42 [2019-11-07 01:29:09,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816329697] [2019-11-07 01:29:09,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-07 01:29:09,737 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:09,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-07 01:29:09,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=1208, Unknown=0, NotChecked=0, Total=1722 [2019-11-07 01:29:09,738 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 42 states. [2019-11-07 01:29:10,223 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:10,372 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:10,540 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:10,692 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:11,377 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:11,956 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:12,117 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:12,446 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:13,212 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:13,522 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:13,682 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-07 01:29:13,843 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2019-11-07 01:29:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:14,844 INFO L93 Difference]: Finished difference Result 173 states and 206 transitions. [2019-11-07 01:29:14,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-07 01:29:14,845 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 61 [2019-11-07 01:29:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:14,847 INFO L225 Difference]: With dead ends: 173 [2019-11-07 01:29:14,847 INFO L226 Difference]: Without dead ends: 127 [2019-11-07 01:29:14,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1606, Invalid=4246, Unknown=0, NotChecked=0, Total=5852 [2019-11-07 01:29:14,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-07 01:29:14,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 86. [2019-11-07 01:29:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-07 01:29:14,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2019-11-07 01:29:14,890 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 61 [2019-11-07 01:29:14,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:14,891 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2019-11-07 01:29:14,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-07 01:29:14,891 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2019-11-07 01:29:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-07 01:29:14,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:14,898 INFO L410 BasicCegarLoop]: trace histogram [28, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:15,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:15,112 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:15,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:15,112 INFO L82 PathProgramCache]: Analyzing trace with hash -578813623, now seen corresponding path program 5 times [2019-11-07 01:29:15,113 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:15,113 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573724757] [2019-11-07 01:29:15,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-07 01:29:15,442 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573724757] [2019-11-07 01:29:15,443 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360293201] [2019-11-07 01:29:15,443 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