/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:26:50,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:26:51,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:26:51,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:26:51,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:26:51,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:26:51,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:26:51,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:26:51,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:26:51,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:26:51,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:26:51,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:26:51,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:26:51,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:26:51,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:26:51,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:26:51,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:26:51,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:26:51,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:26:51,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:26:51,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:26:51,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:26:51,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:26:51,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:26:51,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:26:51,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:26:51,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:26:51,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:26:51,056 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 [2020-07-19 21:26:51,071 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:26:51,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:26:51,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:26:51,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:26:51,073 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:26:51,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:26:51,074 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:26:51,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:26:51,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:26:51,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:26:51,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:26:51,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:26:51,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:26:51,075 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:26:51,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:26:51,075 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:26:51,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:26:51,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:26:51,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:26:51,076 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:26:51,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:26:51,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:26:51,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:26:51,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:26:51,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:26:51,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:26:51,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:26:51,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:26:51,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:26:51,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:26:51,408 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:26:51,423 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:26:51,426 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:26:51,428 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:26:51,429 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:26:51,430 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-07-19 21:26:51,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/282cbcd9b/18addffb403f4324ab5c887746d95706/FLAGce655e3b8 [2020-07-19 21:26:51,906 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:26:51,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-07-19 21:26:51,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/282cbcd9b/18addffb403f4324ab5c887746d95706/FLAGce655e3b8 [2020-07-19 21:26:52,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/282cbcd9b/18addffb403f4324ab5c887746d95706 [2020-07-19 21:26:52,306 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:26:52,308 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:26:52,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:26:52,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:26:52,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:26:52,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:26:52" (1/1) ... [2020-07-19 21:26:52,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b7c2f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:52, skipping insertion in model container [2020-07-19 21:26:52,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:26:52" (1/1) ... [2020-07-19 21:26:52,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:26:52,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:26:52,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:26:52,566 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:26:52,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:26:52,594 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:26:52,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:52 WrapperNode [2020-07-19 21:26:52,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:26:52,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:26:52,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:26:52,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:26:52,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:52" (1/1) ... [2020-07-19 21:26:52,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:52" (1/1) ... [2020-07-19 21:26:52,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:52" (1/1) ... [2020-07-19 21:26:52,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:52" (1/1) ... [2020-07-19 21:26:52,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:52" (1/1) ... [2020-07-19 21:26:52,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:52" (1/1) ... [2020-07-19 21:26:52,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:52" (1/1) ... [2020-07-19 21:26:52,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:26:52,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:26:52,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:26:52,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:26:52,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:52" (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 [2020-07-19 21:26:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:26:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:26:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-19 21:26:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-19 21:26:52,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:26:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:26:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:26:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-19 21:26:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-19 21:26:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:26:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:26:52,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:26:53,007 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:26:53,007 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 21:26:53,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:26:53 BoogieIcfgContainer [2020-07-19 21:26:53,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:26:53,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:26:53,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:26:53,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:26:53,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:26:52" (1/3) ... [2020-07-19 21:26:53,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e279756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:26:53, skipping insertion in model container [2020-07-19 21:26:53,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:26:52" (2/3) ... [2020-07-19 21:26:53,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e279756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:26:53, skipping insertion in model container [2020-07-19 21:26:53,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:26:53" (3/3) ... [2020-07-19 21:26:53,025 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2020-07-19 21:26:53,039 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:26:53,055 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:26:53,096 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:26:53,148 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:26:53,149 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:26:53,149 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:26:53,149 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:26:53,149 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:26:53,149 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:26:53,149 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:26:53,149 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:26:53,171 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-19 21:26:53,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 21:26:53,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:26:53,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:26:53,180 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:26:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:26:53,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-19 21:26:53,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:26:53,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162533616] [2020-07-19 21:26:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 [2020-07-19 21:26:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:26:53,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162533616] [2020-07-19 21:26:53,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:26:53,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:26:53,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260330468] [2020-07-19 21:26:53,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:26:53,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:26:53,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:26:53,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:26:53,422 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-19 21:26:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:26:53,546 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-19 21:26:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:26:53,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-19 21:26:53,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:26:53,561 INFO L225 Difference]: With dead ends: 44 [2020-07-19 21:26:53,562 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 21:26:53,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:26:53,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 21:26:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 21:26:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 21:26:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-19 21:26:53,622 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-19 21:26:53,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:26:53,623 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-19 21:26:53,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:26:53,624 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-19 21:26:53,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 21:26:53,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:26:53,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:26:53,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:26:53,627 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:26:53,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:26:53,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-19 21:26:53,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:26:53,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944729933] [2020-07-19 21:26:53,629 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 [2020-07-19 21:26:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:26:53,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944729933] [2020-07-19 21:26:53,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:26:53,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:26:53,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441485083] [2020-07-19 21:26:53,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:26:53,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:26:53,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:26:53,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:26:53,700 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-19 21:26:53,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:26:53,772 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-19 21:26:53,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:26:53,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-19 21:26:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:26:53,775 INFO L225 Difference]: With dead ends: 36 [2020-07-19 21:26:53,775 INFO L226 Difference]: Without dead ends: 32 [2020-07-19 21:26:53,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:26:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-19 21:26:53,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-19 21:26:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 21:26:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-19 21:26:53,787 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-19 21:26:53,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:26:53,788 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-19 21:26:53,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:26:53,788 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-19 21:26:53,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 21:26:53,790 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:26:53,791 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:26:53,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:26:53,791 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:26:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:26:53,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-19 21:26:53,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:26:53,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954753819] [2020-07-19 21:26:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 [2020-07-19 21:26:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:26:53,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954753819] [2020-07-19 21:26:53,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259875692] [2020-07-19 21:26:53,935 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 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 [2020-07-19 21:26:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:53,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:26:53,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:26:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:26:54,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:26:54,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-19 21:26:54,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786343764] [2020-07-19 21:26:54,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:26:54,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:26:54,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:26:54,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:26:54,087 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-19 21:26:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:26:54,334 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-07-19 21:26:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:26:54,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-19 21:26:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:26:54,337 INFO L225 Difference]: With dead ends: 58 [2020-07-19 21:26:54,337 INFO L226 Difference]: Without dead ends: 34 [2020-07-19 21:26:54,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:26:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-19 21:26:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-19 21:26:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-19 21:26:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-07-19 21:26:54,348 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-07-19 21:26:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:26:54,348 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-07-19 21:26:54,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:26:54,349 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-07-19 21:26:54,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 21:26:54,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:26:54,351 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:26:54,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 21:26:54,564 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:26:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:26:54,565 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-19 21:26:54,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:26:54,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240386982] [2020-07-19 21:26:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 [2020-07-19 21:26:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:26:54,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240386982] [2020-07-19 21:26:54,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313581414] [2020-07-19 21:26:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 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 [2020-07-19 21:26:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:54,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:26:54,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:26:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:26:54,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:26:54,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-19 21:26:54,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056012153] [2020-07-19 21:26:54,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 21:26:54,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:26:54,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 21:26:54,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:26:54,835 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-07-19 21:26:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:26:55,029 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-07-19 21:26:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:26:55,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-19 21:26:55,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:26:55,039 INFO L225 Difference]: With dead ends: 54 [2020-07-19 21:26:55,040 INFO L226 Difference]: Without dead ends: 50 [2020-07-19 21:26:55,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:26:55,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-19 21:26:55,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-07-19 21:26:55,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 21:26:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-07-19 21:26:55,064 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-07-19 21:26:55,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:26:55,067 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-07-19 21:26:55,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 21:26:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-07-19 21:26:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-19 21:26:55,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:26:55,073 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:26:55,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:26:55,287 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:26:55,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:26:55,287 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-19 21:26:55,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:26:55,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062213501] [2020-07-19 21:26:55,289 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 [2020-07-19 21:26:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-19 21:26:55,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062213501] [2020-07-19 21:26:55,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616099172] [2020-07-19 21:26:55,451 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 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 [2020-07-19 21:26:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:55,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:26:55,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:26:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:26:55,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:26:55,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-07-19 21:26:55,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926249286] [2020-07-19 21:26:55,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:26:55,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:26:55,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:26:55,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:26:55,546 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-07-19 21:26:55,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:26:55,882 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-07-19 21:26:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:26:55,883 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-19 21:26:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:26:55,887 INFO L225 Difference]: With dead ends: 108 [2020-07-19 21:26:55,887 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 21:26:55,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:26:55,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 21:26:55,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-19 21:26:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-19 21:26:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-07-19 21:26:55,904 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-07-19 21:26:55,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:26:55,905 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-07-19 21:26:55,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:26:55,905 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-07-19 21:26:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 21:26:55,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:26:55,907 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:26:56,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:26:56,122 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:26:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:26:56,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-19 21:26:56,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:26:56,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385863762] [2020-07-19 21:26:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 [2020-07-19 21:26:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-19 21:26:56,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385863762] [2020-07-19 21:26:56,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438265090] [2020-07-19 21:26:56,263 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 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 [2020-07-19 21:26:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:56,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:26:56,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:26:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-19 21:26:56,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:26:56,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-19 21:26:56,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803821927] [2020-07-19 21:26:56,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:26:56,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:26:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:26:56,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:26:56,384 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states. [2020-07-19 21:26:56,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:26:56,815 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-07-19 21:26:56,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:26:56,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-07-19 21:26:56,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:26:56,820 INFO L225 Difference]: With dead ends: 180 [2020-07-19 21:26:56,820 INFO L226 Difference]: Without dead ends: 120 [2020-07-19 21:26:56,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:26:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-19 21:26:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-07-19 21:26:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-19 21:26:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-07-19 21:26:56,851 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-07-19 21:26:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:26:56,852 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-07-19 21:26:56,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:26:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-07-19 21:26:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-19 21:26:56,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:26:56,856 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:26:57,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:26:57,070 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:26:57,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:26:57,070 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-19 21:26:57,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:26:57,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431699123] [2020-07-19 21:26:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 [2020-07-19 21:26:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-19 21:26:57,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431699123] [2020-07-19 21:26:57,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685373882] [2020-07-19 21:26:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 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 [2020-07-19 21:26:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:57,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:26:57,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:26:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-19 21:26:57,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:26:57,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-19 21:26:57,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353815316] [2020-07-19 21:26:57,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 21:26:57,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:26:57,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 21:26:57,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:26:57,322 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 12 states. [2020-07-19 21:26:57,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:26:57,722 INFO L93 Difference]: Finished difference Result 265 states and 511 transitions. [2020-07-19 21:26:57,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:26:57,723 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-07-19 21:26:57,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:26:57,727 INFO L225 Difference]: With dead ends: 265 [2020-07-19 21:26:57,727 INFO L226 Difference]: Without dead ends: 165 [2020-07-19 21:26:57,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:26:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-19 21:26:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2020-07-19 21:26:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-19 21:26:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 244 transitions. [2020-07-19 21:26:57,788 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 244 transitions. Word has length 54 [2020-07-19 21:26:57,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:26:57,788 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 244 transitions. [2020-07-19 21:26:57,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 21:26:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 244 transitions. [2020-07-19 21:26:57,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-19 21:26:57,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:26:57,794 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:26:57,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 21:26:58,000 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:26:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:26:58,001 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-07-19 21:26:58,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:26:58,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500981856] [2020-07-19 21:26:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 [2020-07-19 21:26:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-19 21:26:58,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500981856] [2020-07-19 21:26:58,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182605734] [2020-07-19 21:26:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 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 [2020-07-19 21:26:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:58,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:26:58,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:26:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-19 21:26:58,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:26:58,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2020-07-19 21:26:58,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20453136] [2020-07-19 21:26:58,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:26:58,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:26:58,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:26:58,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:26:58,287 INFO L87 Difference]: Start difference. First operand 142 states and 244 transitions. Second operand 13 states. [2020-07-19 21:26:58,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:26:58,693 INFO L93 Difference]: Finished difference Result 304 states and 583 transitions. [2020-07-19 21:26:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:26:58,694 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-19 21:26:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:26:58,699 INFO L225 Difference]: With dead ends: 304 [2020-07-19 21:26:58,699 INFO L226 Difference]: Without dead ends: 101 [2020-07-19 21:26:58,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:26:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-19 21:26:58,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-07-19 21:26:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-19 21:26:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 126 transitions. [2020-07-19 21:26:58,739 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 126 transitions. Word has length 55 [2020-07-19 21:26:58,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:26:58,740 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 126 transitions. [2020-07-19 21:26:58,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:26:58,741 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 126 transitions. [2020-07-19 21:26:58,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-19 21:26:58,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:26:58,745 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:26:58,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:26:58,960 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:26:58,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:26:58,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1751947273, now seen corresponding path program 2 times [2020-07-19 21:26:58,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:26:58,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848238868] [2020-07-19 21:26:58,961 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 [2020-07-19 21:26:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-19 21:26:59,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848238868] [2020-07-19 21:26:59,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634810864] [2020-07-19 21:26:59,167 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 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 [2020-07-19 21:26:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:26:59,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:26:59,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:26:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-19 21:26:59,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:26:59,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2020-07-19 21:26:59,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331012281] [2020-07-19 21:26:59,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:26:59,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:26:59,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:26:59,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:26:59,274 INFO L87 Difference]: Start difference. First operand 83 states and 126 transitions. Second operand 16 states. [2020-07-19 21:26:59,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:26:59,865 INFO L93 Difference]: Finished difference Result 174 states and 293 transitions. [2020-07-19 21:26:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 21:26:59,866 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-07-19 21:26:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:26:59,868 INFO L225 Difference]: With dead ends: 174 [2020-07-19 21:26:59,868 INFO L226 Difference]: Without dead ends: 89 [2020-07-19 21:26:59,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-07-19 21:26:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-19 21:26:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2020-07-19 21:26:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-19 21:26:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2020-07-19 21:26:59,879 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 69 [2020-07-19 21:26:59,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:26:59,880 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2020-07-19 21:26:59,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:26:59,880 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2020-07-19 21:26:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-19 21:26:59,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:26:59,882 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:27:00,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:27:00,095 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:27:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:27:00,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2020-07-19 21:27:00,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:27:00,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063351172] [2020-07-19 21:27:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@443635b1 [2020-07-19 21:27:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:27:00,107 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:27:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:27:00,116 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:27:00,135 INFO L174 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2020-07-19 21:27:00,136 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 21:27:00,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-19 21:27:00,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:27:00 BoogieIcfgContainer [2020-07-19 21:27:00,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:27:00,177 INFO L168 Benchmark]: Toolchain (without parser) took 7868.71 ms. Allocated memory was 144.7 MB in the beginning and 289.4 MB in the end (delta: 144.7 MB). Free memory was 102.6 MB in the beginning and 238.2 MB in the end (delta: -135.5 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-19 21:27:00,178 INFO L168 Benchmark]: CDTParser took 1.27 ms. Allocated memory is still 144.7 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-19 21:27:00,178 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.06 ms. Allocated memory is still 144.7 MB. Free memory was 102.2 MB in the beginning and 92.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-19 21:27:00,179 INFO L168 Benchmark]: Boogie Preprocessor took 123.69 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 92.7 MB in the beginning and 180.3 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-19 21:27:00,180 INFO L168 Benchmark]: RCFGBuilder took 296.09 ms. Allocated memory is still 201.9 MB. Free memory was 180.3 MB in the beginning and 166.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-07-19 21:27:00,181 INFO L168 Benchmark]: TraceAbstraction took 7156.40 ms. Allocated memory was 201.9 MB in the beginning and 289.4 MB in the end (delta: 87.6 MB). Free memory was 166.9 MB in the beginning and 238.2 MB in the end (delta: -71.3 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2020-07-19 21:27:00,185 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.27 ms. Allocated memory is still 144.7 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.06 ms. Allocated memory is still 144.7 MB. Free memory was 102.2 MB in the beginning and 92.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.69 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 92.7 MB in the beginning and 180.3 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 296.09 ms. Allocated memory is still 201.9 MB. Free memory was 180.3 MB in the beginning and 166.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7156.40 ms. Allocated memory was 201.9 MB in the beginning and 289.4 MB in the end (delta: 87.6 MB). Free memory was 166.9 MB in the beginning and 238.2 MB in the end (delta: -71.3 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 4; VAL [x=4] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=3, x=4] [L37] int result = fibo1(x); [L38] COND TRUE result == 3 VAL [result=3, x=4] [L39] __VERIFIER_error() VAL [result=3, x=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.9s, OverallIterations: 10, TraceHistogramMax: 5, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 260 SDtfs, 349 SDslu, 1349 SDs, 0 SdLazy, 1767 SolverSat, 295 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 539 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 70 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 715 NumberOfCodeBlocks, 715 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 631 ConstructedInterpolants, 0 QuantifiedInterpolants, 52071 SizeOfPredicates, 25 NumberOfNonLiveVariables, 703 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 330/432 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...