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 -i ../../../trunk/examples/svcomp/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:57:27,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:57:27,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:57:27,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:57:27,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:57:27,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:57:27,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:57:27,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:57:27,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:57:27,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:57:27,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:57:27,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:57:27,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:57:27,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:57:27,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:57:27,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:57:27,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:57:27,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:57:27,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:57:27,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:57:27,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:57:27,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:57:27,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:57:27,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:57:27,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:57:27,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 12:57:27,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 12:57:27,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 12:57:27,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 12:57:27,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 12:57:27,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 12:57:27,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 12:57:27,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 12:57:27,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:57:27,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:57:27,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:57:27,079 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 [2019-09-20 12:57:27,095 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:57:27,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:57:27,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:57:27,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:57:27,098 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:57:27,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:57:27,098 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:57:27,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:57:27,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:57:27,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:57:27,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:57:27,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:57:27,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:57:27,100 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:57:27,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:57:27,100 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:57:27,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:57:27,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:57:27,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:57:27,101 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:57:27,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:57:27,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:57:27,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:57:27,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:57:27,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:57:27,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:57:27,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:57:27,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:57:27,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:57:27,133 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:57:27,145 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:57:27,149 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:57:27,151 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:57:27,151 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:57:27,152 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2019-09-20 12:57:27,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a0cb31c9/df86c2d5fe054b32bd63879941c53ec4/FLAG14a88c47a [2019-09-20 12:57:27,665 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:57:27,667 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c [2019-09-20 12:57:27,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a0cb31c9/df86c2d5fe054b32bd63879941c53ec4/FLAG14a88c47a [2019-09-20 12:57:28,062 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a0cb31c9/df86c2d5fe054b32bd63879941c53ec4 [2019-09-20 12:57:28,073 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:57:28,075 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:57:28,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:57:28,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:57:28,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:57:28,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:28" (1/1) ... [2019-09-20 12:57:28,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bc9e862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:28, skipping insertion in model container [2019-09-20 12:57:28,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:28" (1/1) ... [2019-09-20 12:57:28,095 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:57:28,115 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:57:28,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:57:28,388 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:57:28,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:57:28,441 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:57:28,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:28 WrapperNode [2019-09-20 12:57:28,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:57:28,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:57:28,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:57:28,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:57:28,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:28" (1/1) ... [2019-09-20 12:57:28,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:28" (1/1) ... [2019-09-20 12:57:28,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:28" (1/1) ... [2019-09-20 12:57:28,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:28" (1/1) ... [2019-09-20 12:57:28,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:28" (1/1) ... [2019-09-20 12:57:28,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:28" (1/1) ... [2019-09-20 12:57:28,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:28" (1/1) ... [2019-09-20 12:57:28,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:57:28,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:57:28,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:57:28,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:57:28,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:28" (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 [2019-09-20 12:57:28,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:57:28,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:57:28,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 12:57:28,666 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2019-09-20 12:57:28,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:57:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:57:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-20 12:57:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:57:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-20 12:57:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2019-09-20 12:57:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 12:57:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:57:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-20 12:57:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 12:57:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:57:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:57:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 12:57:28,963 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:57:28,963 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 12:57:28,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:28 BoogieIcfgContainer [2019-09-20 12:57:28,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:57:28,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:57:28,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:57:28,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:57:28,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:57:28" (1/3) ... [2019-09-20 12:57:28,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a783792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:28, skipping insertion in model container [2019-09-20 12:57:28,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:28" (2/3) ... [2019-09-20 12:57:28,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a783792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:28, skipping insertion in model container [2019-09-20 12:57:28,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:28" (3/3) ... [2019-09-20 12:57:28,992 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2019-09-20 12:57:29,016 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:57:29,029 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:57:29,049 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:57:29,083 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:57:29,083 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:57:29,084 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:57:29,084 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:57:29,084 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:57:29,084 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:57:29,084 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:57:29,085 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:57:29,085 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:57:29,100 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-09-20 12:57:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-20 12:57:29,106 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:29,107 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:29,109 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:29,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:29,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1860043698, now seen corresponding path program 1 times [2019-09-20 12:57:29,115 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:29,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:29,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:29,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:29,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:29,306 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:29,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 12:57:29,309 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 12:57:29,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 12:57:29,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:57:29,322 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2019-09-20 12:57:29,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:29,343 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-09-20 12:57:29,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 12:57:29,344 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-09-20 12:57:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:29,353 INFO L225 Difference]: With dead ends: 44 [2019-09-20 12:57:29,354 INFO L226 Difference]: Without dead ends: 21 [2019-09-20 12:57:29,357 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:57:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-20 12:57:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-20 12:57:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-20 12:57:29,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-09-20 12:57:29,399 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2019-09-20 12:57:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:29,400 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-09-20 12:57:29,400 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 12:57:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-09-20 12:57:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-20 12:57:29,401 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:29,401 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:29,402 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:29,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:29,402 INFO L82 PathProgramCache]: Analyzing trace with hash 916881159, now seen corresponding path program 1 times [2019-09-20 12:57:29,402 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:29,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:29,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:29,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:29,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:29,554 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:29,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 12:57:29,555 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 12:57:29,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 12:57:29,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:57:29,557 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2019-09-20 12:57:29,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:29,603 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-09-20 12:57:29,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:57:29,604 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-09-20 12:57:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:29,606 INFO L225 Difference]: With dead ends: 29 [2019-09-20 12:57:29,606 INFO L226 Difference]: Without dead ends: 21 [2019-09-20 12:57:29,607 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:57:29,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-20 12:57:29,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-20 12:57:29,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-20 12:57:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-20 12:57:29,613 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2019-09-20 12:57:29,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:29,613 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-20 12:57:29,613 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 12:57:29,613 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-20 12:57:29,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-20 12:57:29,614 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:29,615 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:29,615 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:29,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:29,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1635275802, now seen corresponding path program 1 times [2019-09-20 12:57:29,616 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:29,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:29,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:29,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:29,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:29,794 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:29,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 12:57:29,797 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:57:29,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:57:29,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:57:29,798 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2019-09-20 12:57:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:29,891 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-09-20 12:57:29,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:57:29,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-20 12:57:29,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:29,894 INFO L225 Difference]: With dead ends: 33 [2019-09-20 12:57:29,894 INFO L226 Difference]: Without dead ends: 24 [2019-09-20 12:57:29,896 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:57:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-20 12:57:29,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-20 12:57:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-20 12:57:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-09-20 12:57:29,907 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2019-09-20 12:57:29,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:29,908 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-09-20 12:57:29,908 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:57:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-09-20 12:57:29,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-20 12:57:29,909 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:29,909 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:29,910 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:29,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:29,910 INFO L82 PathProgramCache]: Analyzing trace with hash 636491705, now seen corresponding path program 1 times [2019-09-20 12:57:29,910 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:29,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:29,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:29,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:29,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:30,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:30,080 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:57:30,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:30,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-20 12:57:30,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:30,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:30,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-09-20 12:57:30,296 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 12:57:30,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 12:57:30,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:57:30,300 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2019-09-20 12:57:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:30,440 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2019-09-20 12:57:30,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:57:30,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-09-20 12:57:30,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:30,441 INFO L225 Difference]: With dead ends: 36 [2019-09-20 12:57:30,441 INFO L226 Difference]: Without dead ends: 27 [2019-09-20 12:57:30,442 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:57:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-20 12:57:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-20 12:57:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-20 12:57:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-09-20 12:57:30,448 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2019-09-20 12:57:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:30,448 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-09-20 12:57:30,449 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 12:57:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-09-20 12:57:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-20 12:57:30,450 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:30,450 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:30,450 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:30,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:30,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1232357626, now seen corresponding path program 2 times [2019-09-20 12:57:30,450 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:30,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:30,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:30,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:30,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-20 12:57:30,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:30,776 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:57:30,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:30,843 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-09-20 12:57:30,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:30,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-20 12:57:30,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-20 12:57:30,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:30,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2019-09-20 12:57:30,934 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-20 12:57:30,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-20 12:57:30,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-09-20 12:57:30,935 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 11 states. [2019-09-20 12:57:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:31,195 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-09-20 12:57:31,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 12:57:31,196 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-09-20 12:57:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:31,200 INFO L225 Difference]: With dead ends: 39 [2019-09-20 12:57:31,200 INFO L226 Difference]: Without dead ends: 30 [2019-09-20 12:57:31,201 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-09-20 12:57:31,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-20 12:57:31,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-09-20 12:57:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-20 12:57:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-09-20 12:57:31,216 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 26 [2019-09-20 12:57:31,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:31,216 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-09-20 12:57:31,217 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-20 12:57:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-09-20 12:57:31,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-20 12:57:31,218 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:31,218 INFO L407 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:31,219 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:31,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1625384636, now seen corresponding path program 1 times [2019-09-20 12:57:31,219 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:31,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:31,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:31,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:31,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:33,742 WARN L191 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 163 DAG size of output: 31 [2019-09-20 12:57:36,225 WARN L191 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2019-09-20 12:57:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:36,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:36,230 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:36,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:36,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-20 12:57:36,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:36,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:57:38,402 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 30 DAG size of output: 13 [2019-09-20 12:57:38,479 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2019-09-20 12:57:38,480 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:57:38,496 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:57:38,498 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 1 [2019-09-20 12:57:38,498 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 12:57:38,566 INFO L567 ElimStorePlain]: treesize reduction 268, result has 10.7 percent of original size [2019-09-20 12:57:38,566 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-09-20 12:57:38,567 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-09-20 12:57:38,567 INFO L464 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2019-09-20 12:57:38,568 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-20 12:57:38,569 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:359, output treesize:32 [2019-09-20 12:57:39,606 WARN L191 SmtUtils]: Spent 928.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-09-20 12:57:40,610 WARN L191 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2019-09-20 12:57:40,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:57:40,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:57:40,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:57:40,619 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:57:40,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:57:41,835 WARN L191 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2019-09-20 12:57:41,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:57:43,887 WARN L191 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2019-09-20 12:57:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:43,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:43,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2019-09-20 12:57:43,991 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-20 12:57:43,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-20 12:57:43,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-09-20 12:57:43,992 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 18 states. [2019-09-20 12:57:45,699 WARN L191 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2019-09-20 12:57:48,074 WARN L191 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2019-09-20 12:57:49,455 WARN L191 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2019-09-20 12:57:51,600 WARN L191 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 50 [2019-09-20 12:57:51,932 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2019-09-20 12:57:52,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:52,719 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2019-09-20 12:57:52,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-20 12:57:52,725 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2019-09-20 12:57:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:52,726 INFO L225 Difference]: With dead ends: 49 [2019-09-20 12:57:52,727 INFO L226 Difference]: Without dead ends: 37 [2019-09-20 12:57:52,727 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2019-09-20 12:57:52,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-20 12:57:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-09-20 12:57:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-20 12:57:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-09-20 12:57:52,738 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 26 [2019-09-20 12:57:52,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:52,739 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-09-20 12:57:52,739 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-20 12:57:52,739 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-09-20 12:57:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-20 12:57:52,740 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:52,740 INFO L407 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:52,740 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:52,741 INFO L82 PathProgramCache]: Analyzing trace with hash -854746409, now seen corresponding path program 2 times [2019-09-20 12:57:52,741 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:52,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:52,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:52,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:52,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:53,182 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 32 [2019-09-20 12:57:53,473 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2019-09-20 12:57:58,086 WARN L191 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 175 DAG size of output: 39 [2019-09-20 12:57:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:58,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:58,092 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:58,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:57:58,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:57:58,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:58,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-20 12:57:58,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:58,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:57:58,275 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-20 12:57:58,275 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:58:02,358 WARN L191 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 59 DAG size of output: 26 [2019-09-20 12:58:02,359 INFO L567 ElimStorePlain]: treesize reduction 238, result has 11.5 percent of original size [2019-09-20 12:58:02,359 INFO L464 ElimStorePlain]: Eliminatee v_prenex_9 vanished before elimination [2019-09-20 12:58:02,363 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-09-20 12:58:02,364 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 12:58:02,373 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:58:02,373 INFO L464 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2019-09-20 12:58:02,374 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-20 12:58:02,375 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:329, output treesize:27 [2019-09-20 12:58:06,892 WARN L191 SmtUtils]: Spent 4.27 s on a formula simplification that was a NOOP. DAG size: 49 [2019-09-20 12:58:15,484 WARN L191 SmtUtils]: Spent 6.63 s on a formula simplification. DAG size of input: 65 DAG size of output: 54