/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/Fibonacci04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:20:17,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:20:17,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:20:17,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 03:20:17,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 03:20:17,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 03:20:17,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 03:20:17,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 03:20:17,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 03:20:17,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 03:20:17,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 03:20:17,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 03:20:17,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:20:17,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:20:17,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:20:17,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:20:17,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:20:17,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:20:17,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:20:17,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:20:17,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:20:17,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:20:17,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:20:17,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:20:17,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:20:17,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:20:17,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:20:17,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:20:17,625 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 03:20:17,648 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:20:17,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:20:17,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:20:17,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:20:17,651 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:20:17,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:20:17,652 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:20:17,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:20:17,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:20:17,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:20:17,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:20:17,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:20:17,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:20:17,654 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:20:17,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:20:17,655 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:20:17,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:20:17,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:20:17,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:20:17,655 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:20:17,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:20:17,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:20:17,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:20:17,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:20:17,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:20:17,657 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:20:17,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:20:17,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:20:17,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:20:17,658 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 03:20:17,952 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:20:17,966 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:20:17,971 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:20:17,973 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:20:17,975 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:20:17,976 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci04.c [2020-07-20 03:20:18,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f2ae744b/31fb3a959515400d83b9cf47e80ecc84/FLAG72d16c0e3 [2020-07-20 03:20:18,535 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:20:18,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci04.c [2020-07-20 03:20:18,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f2ae744b/31fb3a959515400d83b9cf47e80ecc84/FLAG72d16c0e3 [2020-07-20 03:20:18,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f2ae744b/31fb3a959515400d83b9cf47e80ecc84 [2020-07-20 03:20:18,927 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:20:18,930 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:20:18,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:20:18,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:20:18,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:20:18,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:20:18" (1/1) ... [2020-07-20 03:20:18,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a21d1bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:18, skipping insertion in model container [2020-07-20 03:20:18,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:20:18" (1/1) ... [2020-07-20 03:20:18,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:20:18,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:20:19,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:20:19,178 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:20:19,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:20:19,215 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:20:19,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:19 WrapperNode [2020-07-20 03:20:19,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:20:19,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:20:19,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:20:19,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:20:19,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:19" (1/1) ... [2020-07-20 03:20:19,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:19" (1/1) ... [2020-07-20 03:20:19,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:19" (1/1) ... [2020-07-20 03:20:19,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:19" (1/1) ... [2020-07-20 03:20:19,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:19" (1/1) ... [2020-07-20 03:20:19,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:19" (1/1) ... [2020-07-20 03:20:19,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:19" (1/1) ... [2020-07-20 03:20:19,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:20:19,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:20:19,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:20:19,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:20:19,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:19" (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 03:20:19,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:20:19,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:20:19,388 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-20 03:20:19,388 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:20:19,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:20:19,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:20:19,388 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-20 03:20:19,388 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:20:19,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:20:19,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:20:19,580 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:20:19,580 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 03:20:19,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:20:19 BoogieIcfgContainer [2020-07-20 03:20:19,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:20:19,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:20:19,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:20:19,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:20:19,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:20:18" (1/3) ... [2020-07-20 03:20:19,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd9a1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:20:19, skipping insertion in model container [2020-07-20 03:20:19,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:19" (2/3) ... [2020-07-20 03:20:19,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd9a1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:20:19, skipping insertion in model container [2020-07-20 03:20:19,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:20:19" (3/3) ... [2020-07-20 03:20:19,592 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2020-07-20 03:20:19,600 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:20:19,607 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:20:19,621 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:20:19,645 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:20:19,645 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:20:19,645 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:20:19,646 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:20:19,646 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:20:19,646 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:20:19,646 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:20:19,646 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:20:19,665 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-20 03:20:19,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 03:20:19,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:19,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:20:19,673 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:19,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:19,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2020-07-20 03:20:19,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:19,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647673961] [2020-07-20 03:20:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54fe7263 [2020-07-20 03:20:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:19,919 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 03:20:19,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647673961] [2020-07-20 03:20:19,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:20:19,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:20:19,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126662187] [2020-07-20 03:20:19,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:20:19,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:19,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:20:19,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:20:19,956 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-20 03:20:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:20,071 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-20 03:20:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:20:20,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 03:20:20,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:20,085 INFO L225 Difference]: With dead ends: 35 [2020-07-20 03:20:20,086 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 03:20:20,090 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 [2020-07-20 03:20:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 03:20:20,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 03:20:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 03:20:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 03:20:20,160 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-20 03:20:20,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:20,161 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 03:20:20,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:20:20,161 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 03:20:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 03:20:20,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:20,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:20:20,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:20:20,164 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:20,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:20,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2020-07-20 03:20:20,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:20,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917363620] [2020-07-20 03:20:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54fe7263 [2020-07-20 03:20:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:20,237 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 03:20:20,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917363620] [2020-07-20 03:20:20,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:20:20,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:20:20,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669916505] [2020-07-20 03:20:20,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:20:20,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:20,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:20:20,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:20:20,242 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-20 03:20:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:20,313 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-20 03:20:20,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:20:20,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 03:20:20,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:20,316 INFO L225 Difference]: With dead ends: 27 [2020-07-20 03:20:20,316 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 03:20:20,317 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 [2020-07-20 03:20:20,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 03:20:20,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 03:20:20,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 03:20:20,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 03:20:20,334 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-20 03:20:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:20,335 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 03:20:20,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:20:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 03:20:20,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 03:20:20,338 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:20,338 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 03:20:20,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:20:20,340 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:20,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2020-07-20 03:20:20,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:20,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542771101] [2020-07-20 03:20:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54fe7263 [2020-07-20 03:20:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 03:20:20,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542771101] [2020-07-20 03:20:20,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272331992] [2020-07-20 03:20:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f4914e5 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 03:20:20,566 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f4914e5 issued 3 check-sat command(s) [2020-07-20 03:20:20,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:20,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:20:20,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:20,655 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 03:20:20,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:20,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 03:20:20,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053911780] [2020-07-20 03:20:20,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:20:20,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:20,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:20:20,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:20:20,658 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 03:20:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:20,786 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-07-20 03:20:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:20:20,787 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 03:20:20,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:20,789 INFO L225 Difference]: With dead ends: 38 [2020-07-20 03:20:20,789 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 03:20:20,790 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 [2020-07-20 03:20:20,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 03:20:20,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 03:20:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 03:20:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-20 03:20:20,799 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-07-20 03:20:20,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:20,799 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-20 03:20:20,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:20:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-20 03:20:20,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 03:20:20,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:20,818 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 03:20:21,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 03:20:21,033 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:21,035 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2020-07-20 03:20:21,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:21,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072494720] [2020-07-20 03:20:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54fe7263 [2020-07-20 03:20:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:21,139 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 03:20:21,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072494720] [2020-07-20 03:20:21,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312936197] [2020-07-20 03:20:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4cb52f4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:21,189 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4cb52f4 issued 3 check-sat command(s) [2020-07-20 03:20:21,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:21,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:20:21,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:21,226 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 03:20:21,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:21,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 03:20:21,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365854889] [2020-07-20 03:20:21,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:20:21,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:21,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:20:21,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:20:21,229 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 8 states. [2020-07-20 03:20:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:21,343 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-07-20 03:20:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:20:21,344 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-20 03:20:21,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:21,346 INFO L225 Difference]: With dead ends: 41 [2020-07-20 03:20:21,346 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 03:20:21,347 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 [2020-07-20 03:20:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 03:20:21,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-20 03:20:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 03:20:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-07-20 03:20:21,358 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-07-20 03:20:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:21,358 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-07-20 03:20:21,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:20:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-07-20 03:20:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 03:20:21,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:21,361 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 03:20:21,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:21,575 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:21,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:21,576 INFO L82 PathProgramCache]: Analyzing trace with hash -111055954, now seen corresponding path program 2 times [2020-07-20 03:20:21,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:21,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027491260] [2020-07-20 03:20:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54fe7263 [2020-07-20 03:20:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 03:20:21,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027491260] [2020-07-20 03:20:21,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210024810] [2020-07-20 03:20:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7df5b989 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 03:20:21,752 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7df5b989 issued 3 check-sat command(s) [2020-07-20 03:20:21,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:21,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:20:21,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:21,830 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 03:20:21,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:21,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-20 03:20:21,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652569193] [2020-07-20 03:20:21,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 03:20:21,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:21,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 03:20:21,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:20:21,833 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 12 states. [2020-07-20 03:20:22,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:22,072 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2020-07-20 03:20:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 03:20:22,073 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 03:20:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:22,075 INFO L225 Difference]: With dead ends: 71 [2020-07-20 03:20:22,076 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 03:20:22,077 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 [2020-07-20 03:20:22,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 03:20:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-20 03:20:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 03:20:22,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-20 03:20:22,087 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 40 [2020-07-20 03:20:22,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:22,087 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-20 03:20:22,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 03:20:22,088 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-20 03:20:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 03:20:22,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:22,091 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 03:20:22,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:22,307 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:22,307 INFO L82 PathProgramCache]: Analyzing trace with hash -383842586, now seen corresponding path program 3 times [2020-07-20 03:20:22,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:22,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975890770] [2020-07-20 03:20:22,308 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54fe7263 [2020-07-20 03:20:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:22,520 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 03:20:22,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975890770] [2020-07-20 03:20:22,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281093894] [2020-07-20 03:20:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65efb9a3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:22,564 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65efb9a3 issued 3 check-sat command(s) [2020-07-20 03:20:22,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:22,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:20:22,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:22,606 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 03:20:22,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:22,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-20 03:20:22,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607530412] [2020-07-20 03:20:22,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:20:22,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:22,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:20:22,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:20:22,608 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 10 states. [2020-07-20 03:20:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:22,753 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2020-07-20 03:20:22,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:20:22,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-07-20 03:20:22,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:22,758 INFO L225 Difference]: With dead ends: 80 [2020-07-20 03:20:22,758 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 03:20:22,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:20:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 03:20:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-07-20 03:20:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 03:20:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2020-07-20 03:20:22,775 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 68 [2020-07-20 03:20:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:22,775 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2020-07-20 03:20:22,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:20:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2020-07-20 03:20:22,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-20 03:20:22,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:22,780 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 03:20:22,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:22,991 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:22,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:22,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1110256604, now seen corresponding path program 4 times [2020-07-20 03:20:22,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:22,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792236675] [2020-07-20 03:20:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54fe7263 [2020-07-20 03:20:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:23,602 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 03:20:23,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792236675] [2020-07-20 03:20:23,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150867718] [2020-07-20 03:20:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5805359a 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 03:20:23,689 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5805359a issued 4 check-sat command(s) [2020-07-20 03:20:23,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:23,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:20:23,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:23,788 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 03:20:23,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:23,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 15 [2020-07-20 03:20:23,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527494752] [2020-07-20 03:20:23,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:20:23,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:23,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:20:23,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:20:23,791 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand 15 states. [2020-07-20 03:20:24,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:24,396 INFO L93 Difference]: Finished difference Result 147 states and 257 transitions. [2020-07-20 03:20:24,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 03:20:24,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 150 [2020-07-20 03:20:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:24,399 INFO L225 Difference]: With dead ends: 147 [2020-07-20 03:20:24,400 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 03:20:24,403 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 [2020-07-20 03:20:24,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 03:20:24,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-07-20 03:20:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 03:20:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-07-20 03:20:24,413 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 150 [2020-07-20 03:20:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:24,414 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-07-20 03:20:24,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:20:24,414 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-07-20 03:20:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 03:20:24,416 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:24,416 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 03:20:24,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 03:20:24,627 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:24,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:24,628 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 5 times [2020-07-20 03:20:24,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:24,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808973148] [2020-07-20 03:20:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54fe7263 [2020-07-20 03:20:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:20:24,654 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:20:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:20:24,671 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:20:24,694 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 03:20:24,694 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 03:20:24,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 03:20:24,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:20:24 BoogieIcfgContainer [2020-07-20 03:20:24,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:20:24,738 INFO L168 Benchmark]: Toolchain (without parser) took 5807.87 ms. Allocated memory was 140.0 MB in the beginning and 284.2 MB in the end (delta: 144.2 MB). Free memory was 103.7 MB in the beginning and 148.9 MB in the end (delta: -45.2 MB). Peak memory consumption was 99.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:20:24,739 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 03:20:24,739 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.28 ms. Allocated memory is still 140.0 MB. Free memory was 103.5 MB in the beginning and 94.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:20:24,740 INFO L168 Benchmark]: Boogie Preprocessor took 105.54 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 94.0 MB in the beginning and 182.7 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:20:24,741 INFO L168 Benchmark]: RCFGBuilder took 261.63 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 170.4 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-07-20 03:20:24,742 INFO L168 Benchmark]: TraceAbstraction took 5149.14 ms. Allocated memory was 203.4 MB in the beginning and 284.2 MB in the end (delta: 80.7 MB). Free memory was 169.8 MB in the beginning and 148.9 MB in the end (delta: 20.9 MB). Peak memory consumption was 101.6 MB. Max. memory is 7.1 GB. [2020-07-20 03:20:24,746 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 285.28 ms. Allocated memory is still 140.0 MB. Free memory was 103.5 MB in the beginning and 94.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.54 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 94.0 MB in the beginning and 182.7 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 261.63 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 170.4 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5149.14 ms. Allocated memory was 203.4 MB in the beginning and 284.2 MB in the end (delta: 80.7 MB). Free memory was 169.8 MB in the beginning and 148.9 MB in the end (delta: 20.9 MB). Peak memory consumption was 101.6 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: 5.0s, OverallIterations: 8, TraceHistogramMax: 21, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 197 SDslu, 454 SDs, 0 SdLazy, 734 SolverSat, 172 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, 0.8s 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, 0.3s SatisfiabilityAnalysisTime, 1.5s 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...