/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:19:11,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:19:11,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:19:11,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:19:11,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:19:11,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:19:11,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:19:11,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:19:11,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:19:11,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:19:11,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:19:11,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:19:11,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:19:11,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:19:11,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:19:11,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:19:11,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:19:11,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:19:11,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:19:11,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:19:11,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:19:11,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:19:11,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:19:11,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:19:11,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:19:11,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:19:11,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:19:11,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:19:11,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:19:11,258 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:19:11,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:19:11,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:19:11,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:19:11,262 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:19:11,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:19:11,262 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:19:11,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:19:11,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:19:11,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:19:11,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:19:11,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:19:11,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:19:11,265 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:19:11,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:19:11,265 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:19:11,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:19:11,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:19:11,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:19:11,266 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:19:11,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:19:11,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:19:11,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:19:11,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:19:11,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:19:11,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:19:11,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:19:11,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:19:11,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:19:11,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:19:11,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:19:11,783 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:19:11,789 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:19:11,791 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:19:11,792 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:19:11,793 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-09-04 13:19:11,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/521390b2a/c665b62c792642e7a88e909dbcadb4a5/FLAG8f959d5c7 [2020-09-04 13:19:12,506 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:19:12,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-09-04 13:19:12,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/521390b2a/c665b62c792642e7a88e909dbcadb4a5/FLAG8f959d5c7 [2020-09-04 13:19:12,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/521390b2a/c665b62c792642e7a88e909dbcadb4a5 [2020-09-04 13:19:12,848 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:19:12,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:19:12,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:19:12,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:19:12,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:19:12,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:19:12" (1/1) ... [2020-09-04 13:19:12,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22d0bdac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:12, skipping insertion in model container [2020-09-04 13:19:12,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:19:12" (1/1) ... [2020-09-04 13:19:12,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:19:12,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:19:13,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:19:13,159 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:19:13,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:19:13,194 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:19:13,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:13 WrapperNode [2020-09-04 13:19:13,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:19:13,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:19:13,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:19:13,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:19:13,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:13" (1/1) ... [2020-09-04 13:19:13,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:13" (1/1) ... [2020-09-04 13:19:13,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:13" (1/1) ... [2020-09-04 13:19:13,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:13" (1/1) ... [2020-09-04 13:19:13,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:13" (1/1) ... [2020-09-04 13:19:13,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:13" (1/1) ... [2020-09-04 13:19:13,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:13" (1/1) ... [2020-09-04 13:19:13,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:19:13,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:19:13,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:19:13,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:19:13,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:19:13,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:19:13,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:19:13,427 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-04 13:19:13,427 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-04 13:19:13,427 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:19:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:19:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:19:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-04 13:19:13,429 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-04 13:19:13,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:19:13,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:19:13,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:19:13,672 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:19:13,672 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:19:13,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:19:13 BoogieIcfgContainer [2020-09-04 13:19:13,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:19:13,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:19:13,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:19:13,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:19:13,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:19:12" (1/3) ... [2020-09-04 13:19:13,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e33f6f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:19:13, skipping insertion in model container [2020-09-04 13:19:13,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:13" (2/3) ... [2020-09-04 13:19:13,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e33f6f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:19:13, skipping insertion in model container [2020-09-04 13:19:13,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:19:13" (3/3) ... [2020-09-04 13:19:13,688 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2020-09-04 13:19:13,700 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:19:13,708 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:19:13,728 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:19:13,757 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:19:13,758 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:19:13,758 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:19:13,758 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:19:13,758 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:19:13,758 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:19:13,758 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:19:13,758 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:19:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-04 13:19:13,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:19:13,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:13,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:13,787 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:13,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:13,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-09-04 13:19:13,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:13,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285521942] [2020-09-04 13:19:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:19:14,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285521942] [2020-09-04 13:19:14,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:19:14,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:19:14,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366873490] [2020-09-04 13:19:14,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:19:14,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:14,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:19:14,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:19:14,159 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-09-04 13:19:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:14,301 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-09-04 13:19:14,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:19:14,304 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:19:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:14,319 INFO L225 Difference]: With dead ends: 44 [2020-09-04 13:19:14,319 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:19:14,324 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 [2020-09-04 13:19:14,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:19:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-04 13:19:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:19:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-09-04 13:19:14,392 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-09-04 13:19:14,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:14,392 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-09-04 13:19:14,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:19:14,393 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-09-04 13:19:14,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 13:19:14,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:14,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:14,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:19:14,396 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-09-04 13:19:14,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:14,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369474113] [2020-09-04 13:19:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:19:14,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369474113] [2020-09-04 13:19:14,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:19:14,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:19:14,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141514482] [2020-09-04 13:19:14,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:19:14,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:14,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:19:14,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:19:14,491 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-09-04 13:19:14,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:14,570 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-09-04 13:19:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:19:14,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-04 13:19:14,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:14,573 INFO L225 Difference]: With dead ends: 36 [2020-09-04 13:19:14,574 INFO L226 Difference]: Without dead ends: 32 [2020-09-04 13:19:14,575 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 [2020-09-04 13:19:14,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-04 13:19:14,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-09-04 13:19:14,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:19:14,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-09-04 13:19:14,586 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-09-04 13:19:14,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:14,587 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-09-04 13:19:14,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:19:14,587 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-09-04 13:19:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 13:19:14,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:14,589 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] [2020-09-04 13:19:14,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:19:14,590 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:14,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:14,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-09-04 13:19:14,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:14,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049186462] [2020-09-04 13:19:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:19:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:19:14,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049186462] [2020-09-04 13:19:14,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647755364] [2020-09-04 13:19:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:19:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:14,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:19:14,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:19:15,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:15,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-09-04 13:19:15,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809271446] [2020-09-04 13:19:15,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:19:15,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:15,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:19:15,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:19:15,079 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-09-04 13:19:15,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:15,377 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-09-04 13:19:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:19:15,378 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-09-04 13:19:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:15,380 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:19:15,380 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 13:19:15,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:19:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 13:19:15,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-04 13:19:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 13:19:15,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-09-04 13:19:15,395 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-09-04 13:19:15,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:15,396 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-09-04 13:19:15,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:19:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-09-04 13:19:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 13:19:15,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:15,398 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] [2020-09-04 13:19:15,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:19:15,605 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:15,606 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-09-04 13:19:15,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:15,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206571698] [2020-09-04 13:19:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:19:15,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206571698] [2020-09-04 13:19:15,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101628735] [2020-09-04 13:19:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:19:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:15,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:19:15,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:19:15,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:15,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-09-04 13:19:15,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976599766] [2020-09-04 13:19:15,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:19:15,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:15,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:19:15,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:19:15,877 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-09-04 13:19:16,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:16,162 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-09-04 13:19:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:19:16,163 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-09-04 13:19:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:16,172 INFO L225 Difference]: With dead ends: 54 [2020-09-04 13:19:16,173 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 13:19:16,177 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 [2020-09-04 13:19:16,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 13:19:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-09-04 13:19:16,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 13:19:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-09-04 13:19:16,215 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-09-04 13:19:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:16,216 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-09-04 13:19:16,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:19:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-09-04 13:19:16,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-04 13:19:16,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:16,225 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] [2020-09-04 13:19:16,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:16,442 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:16,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:16,443 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-09-04 13:19:16,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:16,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921265523] [2020-09-04 13:19:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:16,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:16,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:16,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:16,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:16,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:19:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:16,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-04 13:19:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-04 13:19:16,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921265523] [2020-09-04 13:19:16,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090384804] [2020-09-04 13:19:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:19:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:16,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:19:16,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-04 13:19:16,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:16,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-09-04 13:19:16,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289697982] [2020-09-04 13:19:16,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:19:16,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:16,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:19:16,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:19:16,808 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-09-04 13:19:17,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:17,188 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-09-04 13:19:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:19:17,189 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-09-04 13:19:17,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:17,192 INFO L225 Difference]: With dead ends: 108 [2020-09-04 13:19:17,192 INFO L226 Difference]: Without dead ends: 66 [2020-09-04 13:19:17,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:19:17,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-04 13:19:17,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-09-04 13:19:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 13:19:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-09-04 13:19:17,210 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-09-04 13:19:17,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:17,211 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-09-04 13:19:17,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:19:17,211 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-09-04 13:19:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-04 13:19:17,213 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:17,214 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] [2020-09-04 13:19:17,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:17,418 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:17,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:17,419 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-09-04 13:19:17,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:17,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496730921] [2020-09-04 13:19:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 13:19:17,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496730921] [2020-09-04 13:19:17,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048811005] [2020-09-04 13:19:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:19:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:17,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:19:17,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-04 13:19:17,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:17,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-09-04 13:19:17,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030123959] [2020-09-04 13:19:17,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:19:17,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:17,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:19:17,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:19:17,821 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states. [2020-09-04 13:19:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:18,387 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-09-04 13:19:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:19:18,388 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-09-04 13:19:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:18,397 INFO L225 Difference]: With dead ends: 180 [2020-09-04 13:19:18,398 INFO L226 Difference]: Without dead ends: 120 [2020-09-04 13:19:18,405 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 [2020-09-04 13:19:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-04 13:19:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-09-04 13:19:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-04 13:19:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-09-04 13:19:18,454 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-09-04 13:19:18,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:18,461 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-09-04 13:19:18,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:19:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-09-04 13:19:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-04 13:19:18,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:18,471 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] [2020-09-04 13:19:18,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:18,672 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:18,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:18,673 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-09-04 13:19:18,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:18,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744027172] [2020-09-04 13:19:18,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:18,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-04 13:19:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-04 13:19:18,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744027172] [2020-09-04 13:19:18,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499538064] [2020-09-04 13:19:18,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:19:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:18,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:19:18,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-04 13:19:19,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:19,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-09-04 13:19:19,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692908056] [2020-09-04 13:19:19,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:19:19,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:19,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:19:19,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:19:19,033 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 12 states. [2020-09-04 13:19:19,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:19,463 INFO L93 Difference]: Finished difference Result 265 states and 511 transitions. [2020-09-04 13:19:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:19:19,468 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-09-04 13:19:19,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:19,474 INFO L225 Difference]: With dead ends: 265 [2020-09-04 13:19:19,474 INFO L226 Difference]: Without dead ends: 165 [2020-09-04 13:19:19,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-04 13:19:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-04 13:19:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2020-09-04 13:19:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-04 13:19:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 244 transitions. [2020-09-04 13:19:19,551 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 244 transitions. Word has length 54 [2020-09-04 13:19:19,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:19,552 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 244 transitions. [2020-09-04 13:19:19,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:19:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 244 transitions. [2020-09-04 13:19:19,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 13:19:19,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:19,556 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] [2020-09-04 13:19:19,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-09-04 13:19:19,771 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:19,772 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-09-04 13:19:19,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:19,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197312757] [2020-09-04 13:19:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:19,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:19,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:19,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:19,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:19:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-04 13:19:20,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197312757] [2020-09-04 13:19:20,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703161387] [2020-09-04 13:19:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:19:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:19:20,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-04 13:19:20,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:20,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2020-09-04 13:19:20,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915069002] [2020-09-04 13:19:20,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:19:20,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:20,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:19:20,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:19:20,217 INFO L87 Difference]: Start difference. First operand 142 states and 244 transitions. Second operand 13 states. [2020-09-04 13:19:20,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:20,688 INFO L93 Difference]: Finished difference Result 304 states and 583 transitions. [2020-09-04 13:19:20,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:19:20,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-09-04 13:19:20,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:20,693 INFO L225 Difference]: With dead ends: 304 [2020-09-04 13:19:20,693 INFO L226 Difference]: Without dead ends: 101 [2020-09-04 13:19:20,697 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 [2020-09-04 13:19:20,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-04 13:19:20,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-09-04 13:19:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-04 13:19:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 126 transitions. [2020-09-04 13:19:20,715 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 126 transitions. Word has length 55 [2020-09-04 13:19:20,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:20,716 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 126 transitions. [2020-09-04 13:19:20,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:19:20,717 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 126 transitions. [2020-09-04 13:19:20,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-04 13:19:20,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:20,719 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] [2020-09-04 13:19:20,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:20,936 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:20,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1751947273, now seen corresponding path program 2 times [2020-09-04 13:19:20,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:20,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137273651] [2020-09-04 13:19:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:20,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:19:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-04 13:19:21,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137273651] [2020-09-04 13:19:21,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917496513] [2020-09-04 13:19:21,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:19:21,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:19:21,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:19:21,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:19:21,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-09-04 13:19:21,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:21,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2020-09-04 13:19:21,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002337017] [2020-09-04 13:19:21,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 13:19:21,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:21,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 13:19:21,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:19:21,439 INFO L87 Difference]: Start difference. First operand 83 states and 126 transitions. Second operand 16 states. [2020-09-04 13:19:22,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:22,186 INFO L93 Difference]: Finished difference Result 174 states and 293 transitions. [2020-09-04 13:19:22,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 13:19:22,187 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-09-04 13:19:22,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:22,192 INFO L225 Difference]: With dead ends: 174 [2020-09-04 13:19:22,192 INFO L226 Difference]: Without dead ends: 89 [2020-09-04 13:19:22,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-09-04 13:19:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-04 13:19:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2020-09-04 13:19:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-04 13:19:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2020-09-04 13:19:22,210 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 69 [2020-09-04 13:19:22,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:22,211 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2020-09-04 13:19:22,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 13:19:22,211 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2020-09-04 13:19:22,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-04 13:19:22,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:22,214 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] [2020-09-04 13:19:22,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:22,430 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:22,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:22,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2020-09-04 13:19:22,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:22,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212871020] [2020-09-04 13:19:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:19:22,451 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:19:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:19:22,470 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:19:22,495 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:19:22,496 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:19:22,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 13:19:22,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:19:22 BoogieIcfgContainer [2020-09-04 13:19:22,544 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:19:22,548 INFO L168 Benchmark]: Toolchain (without parser) took 9697.08 ms. Allocated memory was 147.3 MB in the beginning and 278.9 MB in the end (delta: 131.6 MB). Free memory was 103.4 MB in the beginning and 169.1 MB in the end (delta: -65.7 MB). Peak memory consumption was 65.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:22,549 INFO L168 Benchmark]: CDTParser took 0.65 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:19:22,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.40 ms. Allocated memory is still 147.3 MB. Free memory was 103.2 MB in the beginning and 93.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:22,551 INFO L168 Benchmark]: Boogie Preprocessor took 141.74 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 93.6 MB in the beginning and 182.6 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:22,551 INFO L168 Benchmark]: RCFGBuilder took 339.51 ms. Allocated memory is still 204.5 MB. Free memory was 182.6 MB in the beginning and 169.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:22,552 INFO L168 Benchmark]: TraceAbstraction took 8864.78 ms. Allocated memory was 204.5 MB in the beginning and 278.9 MB in the end (delta: 74.4 MB). Free memory was 168.8 MB in the beginning and 169.1 MB in the end (delta: -253.3 kB). Peak memory consumption was 74.2 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:22,556 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 340.40 ms. Allocated memory is still 147.3 MB. Free memory was 103.2 MB in the beginning and 93.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.74 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 93.6 MB in the beginning and 182.6 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 339.51 ms. Allocated memory is still 204.5 MB. Free memory was 182.6 MB in the beginning and 169.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8864.78 ms. Allocated memory was 204.5 MB in the beginning and 278.9 MB in the end (delta: 74.4 MB). Free memory was 168.8 MB in the beginning and 169.1 MB in the end (delta: -253.3 kB). Peak memory consumption was 74.2 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: 8.7s, OverallIterations: 10, TraceHistogramMax: 5, AutomataDifference: 3.5s, 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, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 539 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.8s 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, 2.5s InterpolantComputationTime, 715 NumberOfCodeBlocks, 715 NumberOfCodeBlocksAsserted, 18 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...