/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 NUM_FUNCTIONS --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/Fibonacci04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:02:21,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:02:21,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:02:21,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:02:21,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:02:21,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:02:21,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:02:21,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:02:21,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:02:21,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:02:21,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:02:21,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:02:21,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:02:21,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:02:21,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:02:21,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:02:21,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:02:21,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:02:21,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:02:21,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:02:21,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:02:21,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:02:21,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:02:21,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:02:21,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:02:21,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:02:21,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:02:21,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:02:21,253 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 23:02:21,267 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:02:21,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:02:21,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:02:21,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:02:21,269 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:02:21,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:02:21,270 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:02:21,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:02:21,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:02:21,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:02:21,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:02:21,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:02:21,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:02:21,271 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:02:21,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:02:21,271 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:02:21,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:02:21,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:02:21,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:02:21,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:02:21,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:02:21,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:02:21,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:02:21,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:02:21,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:02:21,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:02:21,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:02:21,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:02:21,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:02:21,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 [2020-07-19 23:02:21,554 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:02:21,569 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:02:21,572 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:02:21,574 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:02:21,576 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:02:21,578 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci04.c [2020-07-19 23:02:21,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f644edb56/448d43b9aca54c98b770053d122f2873/FLAG6a54cec15 [2020-07-19 23:02:22,151 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:02:22,152 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci04.c [2020-07-19 23:02:22,159 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f644edb56/448d43b9aca54c98b770053d122f2873/FLAG6a54cec15 [2020-07-19 23:02:22,520 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f644edb56/448d43b9aca54c98b770053d122f2873 [2020-07-19 23:02:22,529 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:02:22,532 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:02:22,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:02:22,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:02:22,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:02:22,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:02:22" (1/1) ... [2020-07-19 23:02:22,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70858694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:22, skipping insertion in model container [2020-07-19 23:02:22,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:02:22" (1/1) ... [2020-07-19 23:02:22,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:02:22,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:02:22,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:02:22,732 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:02:22,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:02:22,763 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:02:22,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:22 WrapperNode [2020-07-19 23:02:22,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:02:22,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:02:22,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:02:22,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:02:22,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:22" (1/1) ... [2020-07-19 23:02:22,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:22" (1/1) ... [2020-07-19 23:02:22,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:22" (1/1) ... [2020-07-19 23:02:22,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:22" (1/1) ... [2020-07-19 23:02:22,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:22" (1/1) ... [2020-07-19 23:02:22,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:22" (1/1) ... [2020-07-19 23:02:22,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:22" (1/1) ... [2020-07-19 23:02:22,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:02:22,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:02:22,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:02:22,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:02:22,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:02:22,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:02:22,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:02:22,941 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-19 23:02:22,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:02:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:02:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:02:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-19 23:02:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:02:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:02:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:02:23,123 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:02:23,123 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:02:23,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:02:23 BoogieIcfgContainer [2020-07-19 23:02:23,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:02:23,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:02:23,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:02:23,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:02:23,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:02:22" (1/3) ... [2020-07-19 23:02:23,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf4c73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:02:23, skipping insertion in model container [2020-07-19 23:02:23,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:22" (2/3) ... [2020-07-19 23:02:23,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf4c73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:02:23, skipping insertion in model container [2020-07-19 23:02:23,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:02:23" (3/3) ... [2020-07-19 23:02:23,136 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2020-07-19 23:02:23,147 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:02:23,156 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:02:23,170 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:02:23,195 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:02:23,195 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:02:23,196 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:02:23,196 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:02:23,196 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:02:23,196 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:02:23,196 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:02:23,197 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:02:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-19 23:02:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:02:23,223 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:23,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:23,225 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:23,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:23,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2020-07-19 23:02:23,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:23,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819835116] [2020-07-19 23:02:23,238 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45c6102c [2020-07-19 23:02:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:23,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819835116] [2020-07-19 23:02:23,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:02:23,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:02:23,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136012871] [2020-07-19 23:02:23,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:02:23,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:23,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:02:23,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:02:23,509 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-19 23:02:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:23,637 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-19 23:02:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:02:23,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-19 23:02:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:23,651 INFO L225 Difference]: With dead ends: 35 [2020-07-19 23:02:23,651 INFO L226 Difference]: Without dead ends: 21 [2020-07-19 23:02:23,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:02:23,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-19 23:02:23,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-19 23:02:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 23:02:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-19 23:02:23,704 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-19 23:02:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:23,705 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-19 23:02:23,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:02:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-19 23:02:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 23:02:23,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:23,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:23,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:02:23,710 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:23,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:23,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2020-07-19 23:02:23,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:23,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034517698] [2020-07-19 23:02:23,712 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45c6102c [2020-07-19 23:02:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:23,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034517698] [2020-07-19 23:02:23,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:02:23,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:02:23,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593649910] [2020-07-19 23:02:23,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:02:23,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:23,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:02:23,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:02:23,844 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-19 23:02:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:23,916 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-19 23:02:23,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:02:23,917 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-19 23:02:23,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:23,919 INFO L225 Difference]: With dead ends: 27 [2020-07-19 23:02:23,919 INFO L226 Difference]: Without dead ends: 23 [2020-07-19 23:02:23,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:02:23,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-19 23:02:23,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-19 23:02:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 23:02:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-19 23:02:23,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-19 23:02:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:23,929 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-19 23:02:23,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:02:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-19 23:02:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 23:02:23,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:23,931 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] [2020-07-19 23:02:23,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:02:23,932 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:23,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2020-07-19 23:02:23,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:23,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353830010] [2020-07-19 23:02:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45c6102c [2020-07-19 23:02:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 23:02:24,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353830010] [2020-07-19 23:02:24,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136026430] [2020-07-19 23:02:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b470c00 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:24,106 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b470c00 issued 3 check-sat command(s) [2020-07-19 23:02:24,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:24,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:02:24,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 23:02:24,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:24,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-19 23:02:24,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487209509] [2020-07-19 23:02:24,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:02:24,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:24,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:02:24,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:02:24,227 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-19 23:02:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:24,365 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-07-19 23:02:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:02:24,366 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-19 23:02:24,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:24,367 INFO L225 Difference]: With dead ends: 38 [2020-07-19 23:02:24,368 INFO L226 Difference]: Without dead ends: 23 [2020-07-19 23:02:24,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:02:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-19 23:02:24,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-19 23:02:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-19 23:02:24,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-19 23:02:24,377 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-07-19 23:02:24,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:24,378 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-19 23:02:24,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:02:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-19 23:02:24,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 23:02:24,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:24,380 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] [2020-07-19 23:02:24,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 23:02:24,595 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:24,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:24,597 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2020-07-19 23:02:24,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:24,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250753697] [2020-07-19 23:02:24,598 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45c6102c [2020-07-19 23:02:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:02:24,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250753697] [2020-07-19 23:02:24,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516869345] [2020-07-19 23:02:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ea67d9f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:24,778 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ea67d9f issued 3 check-sat command(s) [2020-07-19 23:02:24,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:24,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:02:24,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:02:24,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:24,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-19 23:02:24,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562013490] [2020-07-19 23:02:24,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:02:24,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:24,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:02:24,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:02:24,812 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 8 states. [2020-07-19 23:02:24,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:24,953 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-07-19 23:02:24,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:02:24,955 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-19 23:02:24,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:24,957 INFO L225 Difference]: With dead ends: 41 [2020-07-19 23:02:24,958 INFO L226 Difference]: Without dead ends: 37 [2020-07-19 23:02:24,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:02:24,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-19 23:02:24,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-19 23:02:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-19 23:02:24,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-07-19 23:02:24,982 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-07-19 23:02:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:24,983 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-07-19 23:02:24,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:02:24,983 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-07-19 23:02:24,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 23:02:24,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:24,988 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] [2020-07-19 23:02:25,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:25,200 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:25,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:25,201 INFO L82 PathProgramCache]: Analyzing trace with hash -111055954, now seen corresponding path program 2 times [2020-07-19 23:02:25,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:25,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638998314] [2020-07-19 23:02:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45c6102c [2020-07-19 23:02:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-19 23:02:25,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638998314] [2020-07-19 23:02:25,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389840739] [2020-07-19 23:02:25,377 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14cac884 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:25,414 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14cac884 issued 3 check-sat command(s) [2020-07-19 23:02:25,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:25,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:02:25,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-19 23:02:25,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:25,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-19 23:02:25,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009631746] [2020-07-19 23:02:25,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 23:02:25,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:25,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 23:02:25,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:02:25,500 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 12 states. [2020-07-19 23:02:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:25,727 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2020-07-19 23:02:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 23:02:25,728 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-19 23:02:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:25,730 INFO L225 Difference]: With dead ends: 71 [2020-07-19 23:02:25,730 INFO L226 Difference]: Without dead ends: 38 [2020-07-19 23:02:25,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:02:25,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-19 23:02:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-19 23:02:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-19 23:02:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-19 23:02:25,741 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 40 [2020-07-19 23:02:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:25,742 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-19 23:02:25,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 23:02:25,742 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-19 23:02:25,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-19 23:02:25,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:25,745 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] [2020-07-19 23:02:25,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:25,960 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:25,960 INFO L82 PathProgramCache]: Analyzing trace with hash -383842586, now seen corresponding path program 3 times [2020-07-19 23:02:25,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:25,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161315736] [2020-07-19 23:02:25,962 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45c6102c [2020-07-19 23:02:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-19 23:02:26,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161315736] [2020-07-19 23:02:26,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970456203] [2020-07-19 23:02:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@213d42d7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:26,332 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@213d42d7 issued 3 check-sat command(s) [2020-07-19 23:02:26,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:26,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:02:26,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-19 23:02:26,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:26,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-19 23:02:26,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730198997] [2020-07-19 23:02:26,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:02:26,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:26,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:02:26,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:02:26,385 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 10 states. [2020-07-19 23:02:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:26,548 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2020-07-19 23:02:26,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:02:26,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-07-19 23:02:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:26,554 INFO L225 Difference]: With dead ends: 80 [2020-07-19 23:02:26,555 INFO L226 Difference]: Without dead ends: 76 [2020-07-19 23:02:26,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:02:26,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-19 23:02:26,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-07-19 23:02:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-19 23:02:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2020-07-19 23:02:26,590 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 68 [2020-07-19 23:02:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:26,591 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2020-07-19 23:02:26,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:02:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2020-07-19 23:02:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-19 23:02:26,602 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:26,602 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] [2020-07-19 23:02:26,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:26,803 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:26,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:26,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1110256604, now seen corresponding path program 4 times [2020-07-19 23:02:26,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:26,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527252005] [2020-07-19 23:02:26,804 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45c6102c [2020-07-19 23:02:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 249 proven. 381 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-07-19 23:02:27,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527252005] [2020-07-19 23:02:27,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185949700] [2020-07-19 23:02:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@10f151b4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:27,420 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@10f151b4 issued 4 check-sat command(s) [2020-07-19 23:02:27,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:27,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:02:27,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 327 proven. 131 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2020-07-19 23:02:27,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:27,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 15 [2020-07-19 23:02:27,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109237405] [2020-07-19 23:02:27,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:02:27,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:27,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:02:27,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:02:27,499 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand 15 states. [2020-07-19 23:02:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:28,112 INFO L93 Difference]: Finished difference Result 147 states and 257 transitions. [2020-07-19 23:02:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 23:02:28,114 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 150 [2020-07-19 23:02:28,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:28,117 INFO L225 Difference]: With dead ends: 147 [2020-07-19 23:02:28,117 INFO L226 Difference]: Without dead ends: 68 [2020-07-19 23:02:28,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2020-07-19 23:02:28,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-19 23:02:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-07-19 23:02:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-19 23:02:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-07-19 23:02:28,130 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 150 [2020-07-19 23:02:28,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:28,131 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-07-19 23:02:28,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:02:28,131 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-07-19 23:02:28,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-19 23:02:28,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:28,133 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] [2020-07-19 23:02:28,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 23:02:28,342 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:28,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:28,343 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 5 times [2020-07-19 23:02:28,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:28,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330481387] [2020-07-19 23:02:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45c6102c [2020-07-19 23:02:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:02:28,363 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:02:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:02:28,379 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:02:28,408 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:02:28,410 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:02:28,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-19 23:02:28,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:02:28 BoogieIcfgContainer [2020-07-19 23:02:28,472 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:02:28,474 INFO L168 Benchmark]: Toolchain (without parser) took 5942.75 ms. Allocated memory was 136.8 MB in the beginning and 296.2 MB in the end (delta: 159.4 MB). Free memory was 102.0 MB in the beginning and 190.9 MB in the end (delta: -88.9 MB). Peak memory consumption was 70.5 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:28,476 INFO L168 Benchmark]: CDTParser took 1.13 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 23:02:28,476 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.95 ms. Allocated memory is still 136.8 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:28,477 INFO L168 Benchmark]: Boogie Preprocessor took 105.90 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 92.1 MB in the beginning and 179.4 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:28,478 INFO L168 Benchmark]: RCFGBuilder took 257.15 ms. Allocated memory is still 200.3 MB. Free memory was 179.4 MB in the beginning and 167.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:28,479 INFO L168 Benchmark]: TraceAbstraction took 5343.30 ms. Allocated memory was 200.3 MB in the beginning and 296.2 MB in the end (delta: 95.9 MB). Free memory was 167.4 MB in the beginning and 190.9 MB in the end (delta: -23.4 MB). Peak memory consumption was 72.5 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:28,483 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.13 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.95 ms. Allocated memory is still 136.8 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.90 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 92.1 MB in the beginning and 179.4 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 257.15 ms. Allocated memory is still 200.3 MB. Free memory was 179.4 MB in the beginning and 167.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5343.30 ms. Allocated memory was 200.3 MB in the beginning and 296.2 MB in the end (delta: 95.9 MB). Free memory was 167.4 MB in the beginning and 190.9 MB in the end (delta: -23.4 MB). Peak memory consumption was 72.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L28] int x = __VERIFIER_nondet_int(); [L29] CALL, EXPR fibonacci(x) VAL [\old(n)=5] [L17] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L19] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=4] [L17] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L19] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=4, fibonacci(n-1)=2, n=4] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=4, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=5, fibonacci(n-1)=3, n=5] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L22] return fibonacci(n-1) + fibonacci(n-2); [L29] RET, EXPR fibonacci(x) VAL [fibonacci(x)=5, x=5] [L29] int result = fibonacci(x); [L30] COND FALSE !(x != 5 || result == 3) VAL [result=5, x=5] [L33] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.2s, OverallIterations: 8, TraceHistogramMax: 21, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 197 SDslu, 454 SDs, 0 SdLazy, 739 SolverSat, 170 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 498 GetRequests, 408 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred 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, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 758 NumberOfCodeBlocks, 720 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 637 ConstructedInterpolants, 0 QuantifiedInterpolants, 104123 SizeOfPredicates, 21 NumberOfNonLiveVariables, 658 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...