java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:32:30,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:32:30,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:32:30,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:32:30,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:32:30,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:32:30,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:32:30,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:32:30,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:32:30,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:32:30,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:32:30,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:32:30,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:32:30,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:32:30,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:32:30,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:32:30,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:32:30,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:32:30,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:32:30,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:32:30,858 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:32:30,880 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:32:30,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:32:30,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:32:30,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:32:30,883 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:32:30,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:32:30,884 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:32:30,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:32:30,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:32:30,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:32:30,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:32:30,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:32:30,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:32:30,886 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:32:30,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:32:30,887 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:32:30,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:32:30,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:32:30,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:32:30,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:32:30,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:32:30,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:32:30,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:32:30,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:32:30,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:32:30,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:32:30,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:32:30,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:32:30,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:32:31,168 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:32:31,182 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:32:31,186 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:32:31,187 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:32:31,188 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:32:31,188 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2019-10-15 01:32:31,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b86621dd2/0997601332e54bbfbaa294cc8437f6fc/FLAG72b8c5aed [2019-10-15 01:32:31,632 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:32:31,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2019-10-15 01:32:31,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b86621dd2/0997601332e54bbfbaa294cc8437f6fc/FLAG72b8c5aed [2019-10-15 01:32:32,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b86621dd2/0997601332e54bbfbaa294cc8437f6fc [2019-10-15 01:32:32,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:32:32,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:32:32,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:32,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:32:32,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:32:32,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:32" (1/1) ... [2019-10-15 01:32:32,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@287e3a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:32, skipping insertion in model container [2019-10-15 01:32:32,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:32" (1/1) ... [2019-10-15 01:32:32,080 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:32:32,097 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:32:32,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:32,246 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:32:32,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:32,289 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:32:32,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:32 WrapperNode [2019-10-15 01:32:32,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:32,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:32:32,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:32:32,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:32:32,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:32" (1/1) ... [2019-10-15 01:32:32,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:32" (1/1) ... [2019-10-15 01:32:32,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:32" (1/1) ... [2019-10-15 01:32:32,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:32" (1/1) ... [2019-10-15 01:32:32,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:32" (1/1) ... [2019-10-15 01:32:32,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:32" (1/1) ... [2019-10-15 01:32:32,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:32" (1/1) ... [2019-10-15 01:32:32,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:32:32,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:32:32,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:32:32,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:32:32,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:32:32,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:32:32,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:32:32,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:32:32,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:32:32,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:32:32,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:32:32,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:32:32,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:32:32,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:32:32,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:32:32,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:32:32,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:32:32,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:32:32,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:32:33,073 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:32:33,074 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 01:32:33,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:33 BoogieIcfgContainer [2019-10-15 01:32:33,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:32:33,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:32:33,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:32:33,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:32:33,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:32:32" (1/3) ... [2019-10-15 01:32:33,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8efd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:33, skipping insertion in model container [2019-10-15 01:32:33,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:32" (2/3) ... [2019-10-15 01:32:33,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8efd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:33, skipping insertion in model container [2019-10-15 01:32:33,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:33" (3/3) ... [2019-10-15 01:32:33,083 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2019-10-15 01:32:33,091 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:32:33,099 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:32:33,111 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:32:33,140 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:32:33,140 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:32:33,140 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:32:33,140 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:32:33,140 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:32:33,141 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:32:33,141 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:32:33,141 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:32:33,157 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:32:33,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:32:33,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:33,166 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:33,169 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:33,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:33,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1240250468, now seen corresponding path program 1 times [2019-10-15 01:32:33,183 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:33,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682528224] [2019-10-15 01:32:33,184 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:33,184 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:33,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:32:33,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682528224] [2019-10-15 01:32:33,388 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:33,388 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:33,389 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501912887] [2019-10-15 01:32:33,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:33,394 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:33,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:33,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:33,413 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-15 01:32:33,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:33,456 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2019-10-15 01:32:33,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:33,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:32:33,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:33,467 INFO L225 Difference]: With dead ends: 35 [2019-10-15 01:32:33,468 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 01:32:33,474 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 01:32:33,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-15 01:32:33,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:32:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-10-15 01:32:33,518 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2019-10-15 01:32:33,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:33,518 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-10-15 01:32:33,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-10-15 01:32:33,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:32:33,520 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:33,520 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:33,520 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:33,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:33,521 INFO L82 PathProgramCache]: Analyzing trace with hash 650913249, now seen corresponding path program 1 times [2019-10-15 01:32:33,521 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:33,522 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173697752] [2019-10-15 01:32:33,522 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:33,522 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:33,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:33,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173697752] [2019-10-15 01:32:33,573 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:33,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:33,573 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252323667] [2019-10-15 01:32:33,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:33,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:33,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:33,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:33,576 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2019-10-15 01:32:33,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:33,597 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2019-10-15 01:32:33,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:33,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-15 01:32:33,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:33,599 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:32:33,599 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:32:33,600 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:33,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:32:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:32:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:32:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-15 01:32:33,606 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2019-10-15 01:32:33,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:33,607 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-15 01:32:33,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:33,607 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-15 01:32:33,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:32:33,608 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:33,608 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:33,608 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:33,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:33,609 INFO L82 PathProgramCache]: Analyzing trace with hash -586370056, now seen corresponding path program 1 times [2019-10-15 01:32:33,609 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:33,609 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541358064] [2019-10-15 01:32:33,610 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:33,610 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:33,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:32:33,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541358064] [2019-10-15 01:32:33,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205780904] [2019-10-15 01:32:33,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:33,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:32:33,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:32:33,821 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:32:33,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1482108010] [2019-10-15 01:32:33,883 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:33,884 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:33,890 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:33,901 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:33,901 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:34,063 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:34,853 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:32:34,948 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:34,961 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:34,968 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:35,328 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:35,328 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:32:35,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017339608] [2019-10-15 01:32:35,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:32:35,331 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:35,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:32:35,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:32:35,334 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 18 states. [2019-10-15 01:32:36,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:36,050 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2019-10-15 01:32:36,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:32:36,051 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2019-10-15 01:32:36,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:36,052 INFO L225 Difference]: With dead ends: 47 [2019-10-15 01:32:36,052 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:32:36,053 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:32:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:32:36,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2019-10-15 01:32:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:32:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-15 01:32:36,061 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2019-10-15 01:32:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:36,061 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-15 01:32:36,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:32:36,061 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-15 01:32:36,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:32:36,062 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:36,062 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:36,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:36,276 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:36,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:36,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1834779132, now seen corresponding path program 2 times [2019-10-15 01:32:36,278 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:36,278 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142327289] [2019-10-15 01:32:36,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:36,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:36,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:32:36,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142327289] [2019-10-15 01:32:36,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214387588] [2019-10-15 01:32:36,413 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:36,489 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:32:36,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:36,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:32:36,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:32:36,517 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:32:36,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098170125] [2019-10-15 01:32:36,552 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:36,552 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:36,553 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:36,553 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:36,553 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:36,602 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:37,198 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:32:37,308 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:37,327 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:37,336 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:37,635 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:37,635 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 11] total 19 [2019-10-15 01:32:37,636 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436479359] [2019-10-15 01:32:37,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:32:37,637 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:37,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:32:37,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:32:37,638 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 19 states. [2019-10-15 01:32:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:38,308 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2019-10-15 01:32:38,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:32:38,309 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2019-10-15 01:32:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:38,311 INFO L225 Difference]: With dead ends: 54 [2019-10-15 01:32:38,311 INFO L226 Difference]: Without dead ends: 42 [2019-10-15 01:32:38,312 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:32:38,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-15 01:32:38,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-10-15 01:32:38,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 01:32:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-10-15 01:32:38,320 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 21 [2019-10-15 01:32:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:38,321 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-10-15 01:32:38,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:32:38,321 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-10-15 01:32:38,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:32:38,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:38,324 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:38,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:38,525 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:38,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:38,525 INFO L82 PathProgramCache]: Analyzing trace with hash -12438844, now seen corresponding path program 3 times [2019-10-15 01:32:38,526 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:38,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814774914] [2019-10-15 01:32:38,526 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:38,526 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:38,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:32:38,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814774914] [2019-10-15 01:32:38,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509627827] [2019-10-15 01:32:38,738 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:38,858 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:38,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:38,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:32:38,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-15 01:32:38,952 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-15 01:32:39,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1701073261] [2019-10-15 01:32:39,059 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:39,060 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:39,061 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:39,062 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:39,062 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:39,097 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:39,672 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:39,680 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:39,684 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:40,026 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:40,026 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7, 11] total 29 [2019-10-15 01:32:40,026 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404714727] [2019-10-15 01:32:40,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-15 01:32:40,028 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:40,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-15 01:32:40,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2019-10-15 01:32:40,029 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 29 states. [2019-10-15 01:32:41,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:41,167 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2019-10-15 01:32:41,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-15 01:32:41,168 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2019-10-15 01:32:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:41,169 INFO L225 Difference]: With dead ends: 73 [2019-10-15 01:32:41,169 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 01:32:41,172 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=398, Invalid=2358, Unknown=0, NotChecked=0, Total=2756 [2019-10-15 01:32:41,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 01:32:41,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2019-10-15 01:32:41,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-15 01:32:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2019-10-15 01:32:41,180 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 29 [2019-10-15 01:32:41,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:41,181 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2019-10-15 01:32:41,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-15 01:32:41,181 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2019-10-15 01:32:41,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 01:32:41,182 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:41,182 INFO L380 BasicCegarLoop]: trace histogram [10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:41,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:41,386 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:41,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:41,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1328394821, now seen corresponding path program 4 times [2019-10-15 01:32:41,388 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:41,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893805539] [2019-10-15 01:32:41,388 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:41,389 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:41,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-15 01:32:41,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893805539] [2019-10-15 01:32:41,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480280860] [2019-10-15 01:32:41,523 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:41,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:32:41,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 01:32:41,714 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 01:32:41,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [523442449] [2019-10-15 01:32:41,953 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:41,955 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:41,955 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:41,956 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:41,956 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:42,010 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:42,532 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:42,540 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:42,553 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:42,915 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:42,915 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13, 11] total 42 [2019-10-15 01:32:42,915 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097515688] [2019-10-15 01:32:42,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-15 01:32:42,917 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:42,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-15 01:32:42,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2019-10-15 01:32:42,919 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 42 states. [2019-10-15 01:32:44,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:44,674 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2019-10-15 01:32:44,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-15 01:32:44,675 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 37 [2019-10-15 01:32:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:44,676 INFO L225 Difference]: With dead ends: 89 [2019-10-15 01:32:44,676 INFO L226 Difference]: Without dead ends: 64 [2019-10-15 01:32:44,679 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1057, Invalid=5105, Unknown=0, NotChecked=0, Total=6162 [2019-10-15 01:32:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-15 01:32:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2019-10-15 01:32:44,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-15 01:32:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2019-10-15 01:32:44,689 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 37 [2019-10-15 01:32:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:44,690 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2019-10-15 01:32:44,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-15 01:32:44,690 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2019-10-15 01:32:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-15 01:32:44,691 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:44,692 INFO L380 BasicCegarLoop]: trace histogram [22, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:44,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:44,896 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:44,897 INFO L82 PathProgramCache]: Analyzing trace with hash -296741436, now seen corresponding path program 5 times [2019-10-15 01:32:44,897 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:44,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069887094] [2019-10-15 01:32:44,897 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:44,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:44,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-15 01:32:45,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069887094] [2019-10-15 01:32:45,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657432211] [2019-10-15 01:32:45,269 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:46,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-15 01:32:46,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:46,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:32:46,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-15 01:32:46,338 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-15 01:32:46,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [576231175] [2019-10-15 01:32:46,544 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:46,544 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:46,544 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:46,545 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:46,545 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:46,570 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:47,055 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:47,061 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:47,065 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:47,533 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:47,534 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11, 11, 11] total 53 [2019-10-15 01:32:47,534 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671911422] [2019-10-15 01:32:47,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-10-15 01:32:47,535 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:47,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-10-15 01:32:47,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=2238, Unknown=0, NotChecked=0, Total=2756 [2019-10-15 01:32:47,538 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 53 states. [2019-10-15 01:32:50,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:50,256 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2019-10-15 01:32:50,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-15 01:32:50,256 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 51 [2019-10-15 01:32:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:50,258 INFO L225 Difference]: With dead ends: 112 [2019-10-15 01:32:50,259 INFO L226 Difference]: Without dead ends: 85 [2019-10-15 01:32:50,264 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2431 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1584, Invalid=8516, Unknown=0, NotChecked=0, Total=10100 [2019-10-15 01:32:50,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-15 01:32:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2019-10-15 01:32:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-15 01:32:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2019-10-15 01:32:50,277 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 51 [2019-10-15 01:32:50,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:50,277 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2019-10-15 01:32:50,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-10-15 01:32:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2019-10-15 01:32:50,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-15 01:32:50,280 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:50,280 INFO L380 BasicCegarLoop]: trace histogram [23, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:50,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:50,485 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1680385249, now seen corresponding path program 6 times [2019-10-15 01:32:50,486 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:50,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655148255] [2019-10-15 01:32:50,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:50,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:50,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-15 01:32:50,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655148255] [2019-10-15 01:32:50,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819633535] [2019-10-15 01:32:50,854 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:50,994 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:50,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:50,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-15 01:32:51,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-15 01:32:51,016 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-15 01:32:51,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83705269] [2019-10-15 01:32:51,806 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:51,806 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:51,807 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:51,807 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:51,807 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:51,827 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:52,341 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:52,351 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:52,353 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:52,723 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:52,723 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 11] total 61 [2019-10-15 01:32:52,723 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163525111] [2019-10-15 01:32:52,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-15 01:32:52,725 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:52,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-15 01:32:52,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1304, Invalid=2356, Unknown=0, NotChecked=0, Total=3660 [2019-10-15 01:32:52,727 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 61 states. [2019-10-15 01:32:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:55,377 INFO L93 Difference]: Finished difference Result 157 states and 187 transitions. [2019-10-15 01:32:55,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-10-15 01:32:55,378 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 72 [2019-10-15 01:32:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:55,380 INFO L225 Difference]: With dead ends: 157 [2019-10-15 01:32:55,380 INFO L226 Difference]: Without dead ends: 110 [2019-10-15 01:32:55,384 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3807, Invalid=9533, Unknown=0, NotChecked=0, Total=13340 [2019-10-15 01:32:55,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-15 01:32:55,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2019-10-15 01:32:55,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-15 01:32:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2019-10-15 01:32:55,398 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 72 [2019-10-15 01:32:55,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:55,399 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2019-10-15 01:32:55,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-10-15 01:32:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2019-10-15 01:32:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-15 01:32:55,402 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:55,402 INFO L380 BasicCegarLoop]: trace histogram [48, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:55,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:55,622 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:55,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:55,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1702326076, now seen corresponding path program 7 times [2019-10-15 01:32:55,623 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:55,623 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991689989] [2019-10-15 01:32:55,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:55,624 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:55,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-15 01:32:56,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991689989] [2019-10-15 01:32:56,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078041690] [2019-10-15 01:32:56,690 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:56,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 50 conjunts are in the unsatisfiable core [2019-10-15 01:32:56,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-15 01:32:56,929 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-15 01:32:59,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [508142381] [2019-10-15 01:32:59,600 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:32:59,600 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:59,600 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:59,601 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:59,601 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:59,626 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:00,100 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:00,126 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:00,128 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:00,645 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:00,646 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51, 11] total 111 [2019-10-15 01:33:00,646 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976046595] [2019-10-15 01:33:00,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-10-15 01:33:00,648 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:00,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-10-15 01:33:00,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5079, Invalid=7131, Unknown=0, NotChecked=0, Total=12210 [2019-10-15 01:33:00,652 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 111 states. [2019-10-15 01:33:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:08,084 INFO L93 Difference]: Finished difference Result 207 states and 262 transitions. [2019-10-15 01:33:08,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2019-10-15 01:33:08,085 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 97 [2019-10-15 01:33:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:08,087 INFO L225 Difference]: With dead ends: 207 [2019-10-15 01:33:08,087 INFO L226 Difference]: Without dead ends: 160 [2019-10-15 01:33:08,092 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9104 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=15032, Invalid=31408, Unknown=0, NotChecked=0, Total=46440 [2019-10-15 01:33:08,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-10-15 01:33:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 151. [2019-10-15 01:33:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-10-15 01:33:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2019-10-15 01:33:08,110 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 97 [2019-10-15 01:33:08,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:08,110 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2019-10-15 01:33:08,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-10-15 01:33:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2019-10-15 01:33:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 01:33:08,113 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:08,113 INFO L380 BasicCegarLoop]: trace histogram [98, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:08,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:08,318 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:08,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2035697508, now seen corresponding path program 8 times [2019-10-15 01:33:08,319 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:08,319 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155246834] [2019-10-15 01:33:08,320 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:08,320 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:08,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5193 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 5022 trivial. 0 not checked. [2019-10-15 01:33:09,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155246834] [2019-10-15 01:33:09,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396562377] [2019-10-15 01:33:09,356 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true