/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.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:34:47,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:34:47,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:34:47,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 03:34:47,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:34:47,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:34:47,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:34:47,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:34:47,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:34:47,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:34:47,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:34:47,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:34:47,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:34:47,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:34:47,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:34:47,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:34:47,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:34:47,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:34:47,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:34:47,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:34:47,227 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 [2020-07-20 03:34:47,252 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:34:47,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:34:47,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:34:47,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:34:47,255 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:34:47,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:34:47,256 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:34:47,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:34:47,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:34:47,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:34:47,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:34:47,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:34:47,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:34:47,258 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:34:47,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:34:47,259 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:34:47,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:34:47,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:34:47,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:34:47,259 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:34:47,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:34:47,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:34:47,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:34:47,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:34:47,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:34:47,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:34:47,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:34:47,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:34:47,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:34:47,261 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:34:47,555 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:34:47,569 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:34:47,572 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:34:47,574 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:34:47,574 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:34:47,574 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-07-20 03:34:47,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34e0eb9c9/cd62a8c09f9a41ed9fb75789f6d3fdd0/FLAGc51c27a3b [2020-07-20 03:34:48,060 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:34:48,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-07-20 03:34:48,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34e0eb9c9/cd62a8c09f9a41ed9fb75789f6d3fdd0/FLAGc51c27a3b [2020-07-20 03:34:48,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34e0eb9c9/cd62a8c09f9a41ed9fb75789f6d3fdd0 [2020-07-20 03:34:48,439 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:34:48,443 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:34:48,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:34:48,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:34:48,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:34:48,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:34:48" (1/1) ... [2020-07-20 03:34:48,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ea1b09d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:48, skipping insertion in model container [2020-07-20 03:34:48,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:34:48" (1/1) ... [2020-07-20 03:34:48,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:34:48,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:34:48,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:34:48,641 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:34:48,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:34:48,673 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:34:48,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:48 WrapperNode [2020-07-20 03:34:48,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:34:48,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:34:48,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:34:48,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:34:48,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:48" (1/1) ... [2020-07-20 03:34:48,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:48" (1/1) ... [2020-07-20 03:34:48,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:48" (1/1) ... [2020-07-20 03:34:48,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:48" (1/1) ... [2020-07-20 03:34:48,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:48" (1/1) ... [2020-07-20 03:34:48,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:48" (1/1) ... [2020-07-20 03:34:48,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:48" (1/1) ... [2020-07-20 03:34:48,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:34:48,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:34:48,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:34:48,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:34:48,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:48" (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 [2020-07-20 03:34:48,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:34:48,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:34:48,850 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-20 03:34:48,850 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:34:48,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:34:48,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:34:48,850 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-20 03:34:48,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:34:48,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:34:48,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:34:49,022 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:34:49,022 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 03:34:49,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:34:49 BoogieIcfgContainer [2020-07-20 03:34:49,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:34:49,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:34:49,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:34:49,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:34:49,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:34:48" (1/3) ... [2020-07-20 03:34:49,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d32928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:34:49, skipping insertion in model container [2020-07-20 03:34:49,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:48" (2/3) ... [2020-07-20 03:34:49,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d32928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:34:49, skipping insertion in model container [2020-07-20 03:34:49,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:34:49" (3/3) ... [2020-07-20 03:34:49,036 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2020-07-20 03:34:49,047 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:34:49,054 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:34:49,069 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:34:49,094 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:34:49,095 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:34:49,095 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:34:49,095 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:34:49,095 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:34:49,096 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:34:49,096 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:34:49,096 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:34:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 03:34:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 03:34:49,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:49,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:49,122 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:49,128 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-20 03:34:49,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:49,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431098339] [2020-07-20 03:34:49,136 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63ced3ee [2020-07-20 03:34:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:34:49,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431098339] [2020-07-20 03:34:49,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:34:49,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:34:49,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646998865] [2020-07-20 03:34:49,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:34:49,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:49,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:34:49,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:34:49,372 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 03:34:49,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:49,485 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-20 03:34:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:34:49,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 03:34:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:49,501 INFO L225 Difference]: With dead ends: 35 [2020-07-20 03:34:49,501 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 03:34:49,505 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 [2020-07-20 03:34:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 03:34:49,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 03:34:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 03:34:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 03:34:49,593 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-20 03:34:49,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:49,594 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 03:34:49,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:34:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 03:34:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 03:34:49,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:49,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:49,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:34:49,602 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:49,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:49,603 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-20 03:34:49,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:49,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571778027] [2020-07-20 03:34:49,604 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63ced3ee [2020-07-20 03:34:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:34:49,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571778027] [2020-07-20 03:34:49,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:34:49,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:34:49,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491958747] [2020-07-20 03:34:49,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:34:49,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:49,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:34:49,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:34:49,710 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-20 03:34:49,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:49,788 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-20 03:34:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:34:49,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 03:34:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:49,790 INFO L225 Difference]: With dead ends: 27 [2020-07-20 03:34:49,791 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 03:34:49,792 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 [2020-07-20 03:34:49,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 03:34:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 03:34:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 03:34:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 03:34:49,801 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-20 03:34:49,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:49,802 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 03:34:49,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:34:49,802 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 03:34:49,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 03:34:49,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:49,804 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:49,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:34:49,805 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:49,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:49,805 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-20 03:34:49,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:49,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975122618] [2020-07-20 03:34:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63ced3ee [2020-07-20 03:34:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 03:34:49,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975122618] [2020-07-20 03:34:49,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669587518] [2020-07-20 03:34:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4ceefac6 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 [2020-07-20 03:34:49,991 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4ceefac6 issued 3 check-sat command(s) [2020-07-20 03:34:49,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:49,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:34:50,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 03:34:50,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:50,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-07-20 03:34:50,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970821911] [2020-07-20 03:34:50,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:34:50,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:50,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:34:50,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:34:50,072 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 03:34:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:50,204 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-07-20 03:34:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:34:50,205 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 03:34:50,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:50,206 INFO L225 Difference]: With dead ends: 38 [2020-07-20 03:34:50,206 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 03:34:50,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:34:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 03:34:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 03:34:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 03:34:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-20 03:34:50,216 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-07-20 03:34:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:50,216 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-20 03:34:50,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:34:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-20 03:34:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 03:34:50,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:50,219 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:50,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 03:34:50,435 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:50,436 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-20 03:34:50,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:50,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128614471] [2020-07-20 03:34:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63ced3ee [2020-07-20 03:34:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:34:50,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128614471] [2020-07-20 03:34:50,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104077454] [2020-07-20 03:34:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79ffe72 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:50,601 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79ffe72 issued 3 check-sat command(s) [2020-07-20 03:34:50,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:50,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:34:50,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:34:50,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:50,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 03:34:50,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140712196] [2020-07-20 03:34:50,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:34:50,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:50,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:34:50,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:34:50,631 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-07-20 03:34:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:50,729 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-07-20 03:34:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:34:50,730 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-07-20 03:34:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:50,732 INFO L225 Difference]: With dead ends: 41 [2020-07-20 03:34:50,733 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 03:34:50,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:34:50,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 03:34:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-20 03:34:50,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 03:34:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-07-20 03:34:50,745 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-07-20 03:34:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:50,745 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-07-20 03:34:50,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:34:50,746 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-07-20 03:34:50,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 03:34:50,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:50,748 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:50,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:50,963 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:50,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:50,965 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-07-20 03:34:50,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:50,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46024394] [2020-07-20 03:34:50,966 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63ced3ee [2020-07-20 03:34:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 03:34:51,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46024394] [2020-07-20 03:34:51,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665723427] [2020-07-20 03:34:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14790725 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 [2020-07-20 03:34:51,279 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14790725 issued 3 check-sat command(s) [2020-07-20 03:34:51,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:51,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:34:51,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 03:34:51,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:51,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-07-20 03:34:51,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238222093] [2020-07-20 03:34:51,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 03:34:51,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:51,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 03:34:51,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:34:51,342 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 12 states. [2020-07-20 03:34:51,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:51,594 INFO L93 Difference]: Finished difference Result 72 states and 109 transitions. [2020-07-20 03:34:51,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 03:34:51,595 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 03:34:51,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:51,597 INFO L225 Difference]: With dead ends: 72 [2020-07-20 03:34:51,597 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 03:34:51,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:34:51,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 03:34:51,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-20 03:34:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 03:34:51,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-20 03:34:51,609 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 40 [2020-07-20 03:34:51,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:51,609 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-20 03:34:51,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 03:34:51,609 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-20 03:34:51,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 03:34:51,612 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:51,612 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:51,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:51,828 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:51,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 3 times [2020-07-20 03:34:51,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:51,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943401512] [2020-07-20 03:34:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63ced3ee [2020-07-20 03:34:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 03:34:52,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943401512] [2020-07-20 03:34:52,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89978679] [2020-07-20 03:34:52,064 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1dacc00d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:52,110 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1dacc00d issued 3 check-sat command(s) [2020-07-20 03:34:52,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:52,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:34:52,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 03:34:52,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:52,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-20 03:34:52,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791479305] [2020-07-20 03:34:52,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:34:52,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:52,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:34:52,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:34:52,177 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 9 states. [2020-07-20 03:34:52,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:52,384 INFO L93 Difference]: Finished difference Result 83 states and 114 transitions. [2020-07-20 03:34:52,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:34:52,385 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-07-20 03:34:52,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:52,392 INFO L225 Difference]: With dead ends: 83 [2020-07-20 03:34:52,392 INFO L226 Difference]: Without dead ends: 79 [2020-07-20 03:34:52,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:34:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-20 03:34:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2020-07-20 03:34:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-20 03:34:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 101 transitions. [2020-07-20 03:34:52,426 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 101 transitions. Word has length 68 [2020-07-20 03:34:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:52,428 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 101 transitions. [2020-07-20 03:34:52,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:34:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 101 transitions. [2020-07-20 03:34:52,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-20 03:34:52,438 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:52,439 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:52,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:52,640 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:52,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:52,640 INFO L82 PathProgramCache]: Analyzing trace with hash -2068257585, now seen corresponding path program 4 times [2020-07-20 03:34:52,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:52,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789221799] [2020-07-20 03:34:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63ced3ee [2020-07-20 03:34:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 249 proven. 381 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-07-20 03:34:53,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789221799] [2020-07-20 03:34:53,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933066520] [2020-07-20 03:34:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11e8069d 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 [2020-07-20 03:34:53,178 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11e8069d issued 4 check-sat command(s) [2020-07-20 03:34:53,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:53,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:34:53,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 327 proven. 131 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2020-07-20 03:34:53,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:53,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2020-07-20 03:34:53,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131786188] [2020-07-20 03:34:53,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:34:53,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:53,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:34:53,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:34:53,278 INFO L87 Difference]: Start difference. First operand 73 states and 101 transitions. Second operand 15 states. [2020-07-20 03:34:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:53,802 INFO L93 Difference]: Finished difference Result 146 states and 255 transitions. [2020-07-20 03:34:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 03:34:53,803 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 150 [2020-07-20 03:34:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:53,806 INFO L225 Difference]: With dead ends: 146 [2020-07-20 03:34:53,807 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 03:34:53,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2020-07-20 03:34:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 03:34:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-07-20 03:34:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 03:34:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-07-20 03:34:53,823 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 150 [2020-07-20 03:34:53,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:53,824 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-07-20 03:34:53,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:34:53,824 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-07-20 03:34:53,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 03:34:53,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:53,826 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:54,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 03:34:54,040 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:54,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:54,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2020-07-20 03:34:54,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:54,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434258760] [2020-07-20 03:34:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63ced3ee [2020-07-20 03:34:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:34:54,064 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:34:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:34:54,087 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:34:54,125 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 03:34:54,125 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 03:34:54,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 03:34:54,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:34:54 BoogieIcfgContainer [2020-07-20 03:34:54,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:34:54,169 INFO L168 Benchmark]: Toolchain (without parser) took 5727.48 ms. Allocated memory was 139.5 MB in the beginning and 281.0 MB in the end (delta: 141.6 MB). Free memory was 103.6 MB in the beginning and 155.2 MB in the end (delta: -51.7 MB). Peak memory consumption was 89.9 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:54,170 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 03:34:54,171 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.54 ms. Allocated memory is still 139.5 MB. Free memory was 103.1 MB in the beginning and 94.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:54,172 INFO L168 Benchmark]: Boogie Preprocessor took 30.57 ms. Allocated memory is still 139.5 MB. Free memory was 94.0 MB in the beginning and 92.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:54,173 INFO L168 Benchmark]: RCFGBuilder took 321.14 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.4 MB in the beginning and 172.2 MB in the end (delta: -79.8 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:54,174 INFO L168 Benchmark]: TraceAbstraction took 5138.44 ms. Allocated memory was 203.9 MB in the beginning and 281.0 MB in the end (delta: 77.1 MB). Free memory was 171.6 MB in the beginning and 155.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 93.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:54,177 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.54 ms. Allocated memory is still 139.5 MB. Free memory was 103.1 MB in the beginning and 94.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.57 ms. Allocated memory is still 139.5 MB. Free memory was 94.0 MB in the beginning and 92.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.14 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.4 MB in the beginning and 172.2 MB in the end (delta: -79.8 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5138.44 ms. Allocated memory was 203.9 MB in the beginning and 281.0 MB in the end (delta: 77.1 MB). Free memory was 171.6 MB in the beginning and 155.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 93.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int x = 5; VAL [x=5] [L25] CALL, EXPR fibo(x) VAL [\old(n)=5] [L6] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L8] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L6] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L8] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L11] return fibo(n-1) + fibo(n-2); [L25] RET, EXPR fibo(x) VAL [fibo(x)=5, x=5] [L25] int result = fibo(x); [L26] COND TRUE result == 5 VAL [result=5, x=5] [L27] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.0s, OverallIterations: 8, TraceHistogramMax: 21, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 236 SDslu, 399 SDs, 0 SdLazy, 646 SolverSat, 188 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 497 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 758 NumberOfCodeBlocks, 720 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 637 ConstructedInterpolants, 0 QuantifiedInterpolants, 103465 SizeOfPredicates, 21 NumberOfNonLiveVariables, 641 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 2097/2834 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...