/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_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:25:02,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:25:02,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:25:02,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 01:25:02,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:25:02,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:25:02,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:25:02,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:25:02,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:25:02,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:25:02,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:25:02,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:25:02,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:25:02,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:25:02,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:25:02,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:25:02,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:25:02,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:25:02,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:25:02,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:25:02,494 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 01:25:02,509 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:25:02,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:25:02,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:25:02,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:25:02,511 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:25:02,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:25:02,512 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:25:02,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:25:02,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:25:02,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:25:02,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:25:02,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:25:02,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:25:02,513 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:25:02,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:25:02,514 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:25:02,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:25:02,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:25:02,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:25:02,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:25:02,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:25:02,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:25:02,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:25:02,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:25:02,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:25:02,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:25:02,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:25:02,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:25:02,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:25:02,516 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_VARIABLES 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 01:25:02,872 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:25:02,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:25:02,889 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:25:02,891 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:25:02,892 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:25:02,892 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-20 01:25:02,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa6f2ee1a/8607edd3533e4c12820b0de2c0d9bb21/FLAG8ef775210 [2020-07-20 01:25:03,409 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:25:03,410 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-20 01:25:03,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa6f2ee1a/8607edd3533e4c12820b0de2c0d9bb21/FLAG8ef775210 [2020-07-20 01:25:03,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa6f2ee1a/8607edd3533e4c12820b0de2c0d9bb21 [2020-07-20 01:25:03,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:25:03,816 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:25:03,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:25:03,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:25:03,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:25:03,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:25:03" (1/1) ... [2020-07-20 01:25:03,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e605e3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:25:03, skipping insertion in model container [2020-07-20 01:25:03,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:25:03" (1/1) ... [2020-07-20 01:25:03,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:25:03,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:25:04,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:25:04,030 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:25:04,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:25:04,057 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:25:04,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:25:04 WrapperNode [2020-07-20 01:25:04,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:25:04,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:25:04,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:25:04,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:25:04,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:25:04" (1/1) ... [2020-07-20 01:25:04,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:25:04" (1/1) ... [2020-07-20 01:25:04,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:25:04" (1/1) ... [2020-07-20 01:25:04,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:25:04" (1/1) ... [2020-07-20 01:25:04,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:25:04" (1/1) ... [2020-07-20 01:25:04,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:25:04" (1/1) ... [2020-07-20 01:25:04,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:25:04" (1/1) ... [2020-07-20 01:25:04,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:25:04,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:25:04,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:25:04,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:25:04,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:25:04" (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 01:25:04,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:25:04,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:25:04,238 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 01:25:04,238 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 01:25:04,239 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:25:04,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:25:04,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:25:04,240 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 01:25:04,240 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 01:25:04,240 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:25:04,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:25:04,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:25:04,456 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:25:04,456 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 01:25:04,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:25:04 BoogieIcfgContainer [2020-07-20 01:25:04,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:25:04,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:25:04,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:25:04,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:25:04,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:25:03" (1/3) ... [2020-07-20 01:25:04,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea9e5b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:25:04, skipping insertion in model container [2020-07-20 01:25:04,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:25:04" (2/3) ... [2020-07-20 01:25:04,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea9e5b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:25:04, skipping insertion in model container [2020-07-20 01:25:04,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:25:04" (3/3) ... [2020-07-20 01:25:04,479 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-07-20 01:25:04,494 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:25:04,502 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:25:04,535 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:25:04,591 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:25:04,592 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:25:04,592 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:25:04,592 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:25:04,592 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:25:04,592 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:25:04,592 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:25:04,592 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:25:04,611 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 01:25:04,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 01:25:04,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:25:04,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:25:04,620 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:25:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:25:04,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 01:25:04,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:25:04,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953346333] [2020-07-20 01:25:04,635 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26d14dae [2020-07-20 01:25:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:04,852 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 01:25:04,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953346333] [2020-07-20 01:25:04,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:25:04,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:25:04,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031677956] [2020-07-20 01:25:04,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:25:04,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:25:04,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:25:04,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:25:04,881 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 01:25:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:25:05,067 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 01:25:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:25:05,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 01:25:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:25:05,093 INFO L225 Difference]: With dead ends: 44 [2020-07-20 01:25:05,093 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 01:25:05,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:25:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 01:25:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 01:25:05,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 01:25:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 01:25:05,182 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 01:25:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:25:05,183 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 01:25:05,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:25:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 01:25:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 01:25:05,186 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:25:05,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:25:05,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:25:05,187 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:25:05,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:25:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 01:25:05,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:25:05,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816330272] [2020-07-20 01:25:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26d14dae [2020-07-20 01:25:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:05,248 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 01:25:05,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816330272] [2020-07-20 01:25:05,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:25:05,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:25:05,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259765849] [2020-07-20 01:25:05,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:25:05,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:25:05,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:25:05,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:25:05,256 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 01:25:05,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:25:05,335 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 01:25:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:25:05,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 01:25:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:25:05,338 INFO L225 Difference]: With dead ends: 36 [2020-07-20 01:25:05,338 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 01:25:05,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:25:05,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 01:25:05,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 01:25:05,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 01:25:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 01:25:05,350 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 01:25:05,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:25:05,350 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 01:25:05,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:25:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 01:25:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 01:25:05,352 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:25:05,353 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:25:05,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:25:05,353 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:25:05,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:25:05,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 01:25:05,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:25:05,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466177693] [2020-07-20 01:25:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26d14dae [2020-07-20 01:25:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:25:05,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466177693] [2020-07-20 01:25:05,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502831547] [2020-07-20 01:25:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@688b28b0 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 01:25:05,557 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@688b28b0 issued 3 check-sat command(s) [2020-07-20 01:25:05,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:25:05,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:25:05,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:25:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:25:05,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:25:05,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 01:25:05,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647052392] [2020-07-20 01:25:05,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:25:05,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:25:05,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:25:05,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:25:05,656 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 01:25:05,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:25:05,907 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-07-20 01:25:05,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 01:25:05,908 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 01:25:05,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:25:05,909 INFO L225 Difference]: With dead ends: 58 [2020-07-20 01:25:05,910 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 01:25:05,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:25:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 01:25:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-20 01:25:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 01:25:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-07-20 01:25:05,920 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-07-20 01:25:05,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:25:05,921 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-07-20 01:25:05,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:25:05,921 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-07-20 01:25:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 01:25:05,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:25:05,923 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:25:06,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 01:25:06,137 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:25:06,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:25:06,139 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 01:25:06,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:25:06,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116400936] [2020-07-20 01:25:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26d14dae [2020-07-20 01:25:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:25:06,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116400936] [2020-07-20 01:25:06,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549771535] [2020-07-20 01:25:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3730a171 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:25:06,344 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3730a171 issued 3 check-sat command(s) [2020-07-20 01:25:06,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:25:06,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:25:06,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:25:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:25:06,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:25:06,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 01:25:06,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147928737] [2020-07-20 01:25:06,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:25:06,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:25:06,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:25:06,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:25:06,388 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-07-20 01:25:06,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:25:06,574 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-07-20 01:25:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:25:06,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 01:25:06,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:25:06,578 INFO L225 Difference]: With dead ends: 54 [2020-07-20 01:25:06,578 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 01:25:06,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:25:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 01:25:06,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-07-20 01:25:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:25:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-07-20 01:25:06,596 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-07-20 01:25:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:25:06,598 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-07-20 01:25:06,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:25:06,598 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-07-20 01:25:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 01:25:06,602 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:25:06,602 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:25:06,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:25:06,803 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:25:06,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:25:06,804 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 01:25:06,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:25:06,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518241590] [2020-07-20 01:25:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26d14dae [2020-07-20 01:25:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 01:25:06,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518241590] [2020-07-20 01:25:06,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072995450] [2020-07-20 01:25:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17f1c2ed 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 01:25:06,961 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17f1c2ed issued 3 check-sat command(s) [2020-07-20 01:25:06,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:25:06,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 01:25:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:25:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 01:25:07,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:25:07,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-07-20 01:25:07,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215130784] [2020-07-20 01:25:07,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 01:25:07,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:25:07,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 01:25:07,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:25:07,027 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-07-20 01:25:07,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:25:07,329 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-07-20 01:25:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 01:25:07,330 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 01:25:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:25:07,332 INFO L225 Difference]: With dead ends: 108 [2020-07-20 01:25:07,333 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 01:25:07,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-20 01:25:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 01:25:07,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-20 01:25:07,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 01:25:07,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-07-20 01:25:07,350 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-07-20 01:25:07,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:25:07,351 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-07-20 01:25:07,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 01:25:07,351 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-07-20 01:25:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 01:25:07,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:25:07,354 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:25:07,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:25:07,570 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:25:07,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:25:07,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 01:25:07,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:25:07,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532942069] [2020-07-20 01:25:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26d14dae [2020-07-20 01:25:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 01:25:07,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532942069] [2020-07-20 01:25:07,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714897084] [2020-07-20 01:25:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d1e65fa No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:25:07,775 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d1e65fa issued 3 check-sat command(s) [2020-07-20 01:25:07,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:25:07,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 01:25:07,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:25:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 01:25:07,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:25:07,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-20 01:25:07,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421171706] [2020-07-20 01:25:07,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 01:25:07,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:25:07,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 01:25:07,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:25:07,868 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states. [2020-07-20 01:25:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:25:08,281 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-07-20 01:25:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 01:25:08,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-07-20 01:25:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:25:08,285 INFO L225 Difference]: With dead ends: 180 [2020-07-20 01:25:08,285 INFO L226 Difference]: Without dead ends: 120 [2020-07-20 01:25:08,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-07-20 01:25:08,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-20 01:25:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-07-20 01:25:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 01:25:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-07-20 01:25:08,311 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-07-20 01:25:08,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:25:08,312 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-07-20 01:25:08,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 01:25:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-07-20 01:25:08,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 01:25:08,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:25:08,316 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:25:08,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:25:08,530 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:25:08,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:25:08,531 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 01:25:08,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:25:08,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612146044] [2020-07-20 01:25:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26d14dae [2020-07-20 01:25:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-20 01:25:08,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612146044] [2020-07-20 01:25:08,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809541264] [2020-07-20 01:25:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@53a09912 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 01:25:08,812 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@53a09912 issued 3 check-sat command(s) [2020-07-20 01:25:08,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:25:08,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 01:25:08,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:25:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 01:25:08,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:25:08,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-07-20 01:25:08,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809368401] [2020-07-20 01:25:08,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 01:25:08,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:25:08,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 01:25:08,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:25:08,913 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 14 states. [2020-07-20 01:25:09,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:25:09,447 INFO L93 Difference]: Finished difference Result 258 states and 498 transitions. [2020-07-20 01:25:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 01:25:09,447 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 01:25:09,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:25:09,450 INFO L225 Difference]: With dead ends: 258 [2020-07-20 01:25:09,451 INFO L226 Difference]: Without dead ends: 158 [2020-07-20 01:25:09,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-07-20 01:25:09,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-20 01:25:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2020-07-20 01:25:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 01:25:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 180 transitions. [2020-07-20 01:25:09,479 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 180 transitions. Word has length 54 [2020-07-20 01:25:09,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:25:09,480 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 180 transitions. [2020-07-20 01:25:09,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 01:25:09,480 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 180 transitions. [2020-07-20 01:25:09,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 01:25:09,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:25:09,484 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:25:09,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 01:25:09,700 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:25:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:25:09,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 1 times [2020-07-20 01:25:09,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:25:09,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379680851] [2020-07-20 01:25:09,702 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26d14dae [2020-07-20 01:25:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-07-20 01:25:09,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379680851] [2020-07-20 01:25:09,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431028736] [2020-07-20 01:25:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@482e1a10 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:25:10,063 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@482e1a10 issued 4 check-sat command(s) [2020-07-20 01:25:10,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:25:10,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 01:25:10,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:25:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 01:25:10,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:25:10,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-07-20 01:25:10,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646349701] [2020-07-20 01:25:10,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 01:25:10,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:25:10,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 01:25:10,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:25:10,148 INFO L87 Difference]: Start difference. First operand 112 states and 180 transitions. Second operand 14 states. [2020-07-20 01:25:10,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:25:10,656 INFO L93 Difference]: Finished difference Result 244 states and 474 transitions. [2020-07-20 01:25:10,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 01:25:10,657 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-07-20 01:25:10,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:25:10,662 INFO L225 Difference]: With dead ends: 244 [2020-07-20 01:25:10,662 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 01:25:10,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-07-20 01:25:10,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 01:25:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2020-07-20 01:25:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 01:25:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 154 transitions. [2020-07-20 01:25:10,703 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 154 transitions. Word has length 82 [2020-07-20 01:25:10,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:25:10,704 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 154 transitions. [2020-07-20 01:25:10,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 01:25:10,705 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 154 transitions. [2020-07-20 01:25:10,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-20 01:25:10,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:25:10,710 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:25:10,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:25:10,911 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:25:10,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:25:10,912 INFO L82 PathProgramCache]: Analyzing trace with hash 2011292190, now seen corresponding path program 1 times [2020-07-20 01:25:10,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:25:10,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562200738] [2020-07-20 01:25:10,913 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26d14dae [2020-07-20 01:25:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 89 proven. 150 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-07-20 01:25:11,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562200738] [2020-07-20 01:25:11,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219720775] [2020-07-20 01:25:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217f7a4f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:25:11,368 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217f7a4f issued 4 check-sat command(s) [2020-07-20 01:25:11,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:25:11,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 01:25:11,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:25:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 131 proven. 49 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2020-07-20 01:25:11,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:25:11,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2020-07-20 01:25:11,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244665608] [2020-07-20 01:25:11,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 01:25:11,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:25:11,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 01:25:11,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-07-20 01:25:11,498 INFO L87 Difference]: Start difference. First operand 101 states and 154 transitions. Second operand 18 states. [2020-07-20 01:25:12,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:25:12,351 INFO L93 Difference]: Finished difference Result 238 states and 428 transitions. [2020-07-20 01:25:12,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 01:25:12,351 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 136 [2020-07-20 01:25:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:25:12,355 INFO L225 Difference]: With dead ends: 238 [2020-07-20 01:25:12,355 INFO L226 Difference]: Without dead ends: 135 [2020-07-20 01:25:12,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 01:25:12,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-20 01:25:12,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2020-07-20 01:25:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 01:25:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 160 transitions. [2020-07-20 01:25:12,388 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 160 transitions. Word has length 136 [2020-07-20 01:25:12,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:25:12,390 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 160 transitions. [2020-07-20 01:25:12,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 01:25:12,390 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 160 transitions. [2020-07-20 01:25:12,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-20 01:25:12,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:25:12,394 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:25:12,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:25:12,611 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:25:12,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:25:12,612 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 2 times [2020-07-20 01:25:12,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:25:12,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527820044] [2020-07-20 01:25:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26d14dae [2020-07-20 01:25:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 59 proven. 50 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-20 01:25:12,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527820044] [2020-07-20 01:25:12,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660176223] [2020-07-20 01:25:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@748501b8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:25:12,889 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@748501b8 issued 4 check-sat command(s) [2020-07-20 01:25:12,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:25:12,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 01:25:12,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:25:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-20 01:25:12,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:25:12,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2020-07-20 01:25:12,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521465135] [2020-07-20 01:25:12,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 01:25:12,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:25:12,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 01:25:12,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:25:12,951 INFO L87 Difference]: Start difference. First operand 112 states and 160 transitions. Second operand 15 states. [2020-07-20 01:25:13,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:25:13,431 INFO L93 Difference]: Finished difference Result 228 states and 340 transitions. [2020-07-20 01:25:13,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 01:25:13,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 95 [2020-07-20 01:25:13,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:25:13,434 INFO L225 Difference]: With dead ends: 228 [2020-07-20 01:25:13,435 INFO L226 Difference]: Without dead ends: 129 [2020-07-20 01:25:13,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-07-20 01:25:13,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-07-20 01:25:13,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2020-07-20 01:25:13,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-20 01:25:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 163 transitions. [2020-07-20 01:25:13,451 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 163 transitions. Word has length 95 [2020-07-20 01:25:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:25:13,452 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 163 transitions. [2020-07-20 01:25:13,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 01:25:13,452 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 163 transitions. [2020-07-20 01:25:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 01:25:13,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:25:13,455 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:25:13,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 01:25:13,669 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:25:13,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:25:13,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2020-07-20 01:25:13,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:25:13,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787357957] [2020-07-20 01:25:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26d14dae [2020-07-20 01:25:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-20 01:25:14,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787357957] [2020-07-20 01:25:14,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102860688] [2020-07-20 01:25:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@714b4d00 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:25:14,376 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@714b4d00 issued 4 check-sat command(s) [2020-07-20 01:25:14,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:25:14,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-20 01:25:14,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:25:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-20 01:25:14,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:25:14,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-20 01:25:14,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223198433] [2020-07-20 01:25:14,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 01:25:14,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:25:14,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 01:25:14,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-20 01:25:14,862 INFO L87 Difference]: Start difference. First operand 117 states and 163 transitions. Second operand 28 states. [2020-07-20 01:25:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:25:15,167 INFO L93 Difference]: Finished difference Result 127 states and 175 transitions. [2020-07-20 01:25:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 01:25:15,168 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2020-07-20 01:25:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:25:15,170 INFO L225 Difference]: With dead ends: 127 [2020-07-20 01:25:15,170 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 01:25:15,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 138 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-20 01:25:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 01:25:15,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2020-07-20 01:25:15,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 01:25:15,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2020-07-20 01:25:15,191 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 109 [2020-07-20 01:25:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:25:15,192 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2020-07-20 01:25:15,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 01:25:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2020-07-20 01:25:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-07-20 01:25:15,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:25:15,194 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:25:15,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:25:15,408 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:25:15,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:25:15,409 INFO L82 PathProgramCache]: Analyzing trace with hash 648432456, now seen corresponding path program 1 times [2020-07-20 01:25:15,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:25:15,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768103194] [2020-07-20 01:25:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26d14dae [2020-07-20 01:25:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:25:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 58 proven. 143 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-07-20 01:25:15,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768103194] [2020-07-20 01:25:15,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880767915] [2020-07-20 01:25:15,678 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37630a52 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:25:15,744 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37630a52 issued 3 check-sat command(s) [2020-07-20 01:25:15,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:25:15,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 01:25:15,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:25:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 49 proven. 166 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-07-20 01:25:15,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:25:15,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-07-20 01:25:15,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758097632] [2020-07-20 01:25:15,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 01:25:15,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:25:15,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 01:25:15,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-07-20 01:25:15,867 INFO L87 Difference]: Start difference. First operand 107 states and 147 transitions. Second operand 16 states. [2020-07-20 01:25:16,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:25:16,294 INFO L93 Difference]: Finished difference Result 212 states and 310 transitions. [2020-07-20 01:25:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 01:25:16,295 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 137 [2020-07-20 01:25:16,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:25:16,296 INFO L225 Difference]: With dead ends: 212 [2020-07-20 01:25:16,296 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 01:25:16,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-07-20 01:25:16,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 01:25:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 01:25:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 01:25:16,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 01:25:16,299 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 137 [2020-07-20 01:25:16,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:25:16,299 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 01:25:16,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 01:25:16,299 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 01:25:16,299 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 01:25:16,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:25:16,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 01:25:17,072 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 7 [2020-07-20 01:25:17,385 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 15 [2020-07-20 01:25:17,752 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2020-07-20 01:25:17,757 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 01:25:17,757 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:25:17,757 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:25:17,757 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 01:25:17,758 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 01:25:17,758 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:25:17,758 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-20 01:25:17,758 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-20 01:25:17,758 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-20 01:25:17,759 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-20 01:25:17,759 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-20 01:25:17,759 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-20 01:25:17,759 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-07-20 01:25:17,760 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-20 01:25:17,760 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-20 01:25:17,760 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-20 01:25:17,760 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 2)) (= fibo2_~n |fibo2_#in~n|)) [2020-07-20 01:25:17,760 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-20 01:25:17,760 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#t~ret2| 1) (<= |fibo2_#in~n| 3) (<= 1 |fibo2_#t~ret2|) .cse0 (<= 3 fibo2_~n)) (and (<= 5 |fibo2_#in~n|) .cse0))) [2020-07-20 01:25:17,761 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-20 01:25:17,761 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-20 01:25:17,761 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-20 01:25:17,761 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-20 01:25:17,761 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-20 01:25:17,761 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-20 01:25:17,761 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2020-07-20 01:25:17,761 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-20 01:25:17,762 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (<= 1 |fibo1_#t~ret0|)) (.cse1 (<= |fibo1_#t~ret0| 1)) (.cse2 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 fibo1_~n) .cse1 .cse2 (<= |fibo1_#in~n| 3)) (and (<= |fibo1_#in~n| 2) .cse0 (< 1 fibo1_~n) .cse1 .cse2) (and (<= 3 |fibo1_#t~ret0|) (<= 5 fibo1_~n) (<= |fibo1_#t~ret0| 3) .cse2) (and (<= |fibo1_#in~n| 4) .cse2 (<= 4 |fibo1_#in~n|)) (and (<= 6 |fibo1_#in~n|) .cse2))) [2020-07-20 01:25:17,762 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-20 01:25:17,762 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-20 01:25:17,762 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-20 01:25:17,762 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-20 01:25:17,762 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-20 01:25:17,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:25:17 BoogieIcfgContainer [2020-07-20 01:25:17,768 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:25:17,770 INFO L168 Benchmark]: Toolchain (without parser) took 13956.11 ms. Allocated memory was 143.1 MB in the beginning and 352.8 MB in the end (delta: 209.7 MB). Free memory was 101.1 MB in the beginning and 86.7 MB in the end (delta: 14.3 MB). Peak memory consumption was 224.1 MB. Max. memory is 7.1 GB. [2020-07-20 01:25:17,771 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 143.1 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 01:25:17,771 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.11 ms. Allocated memory is still 143.1 MB. Free memory was 100.7 MB in the beginning and 90.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:25:17,772 INFO L168 Benchmark]: Boogie Preprocessor took 110.71 ms. Allocated memory was 143.1 MB in the beginning and 197.7 MB in the end (delta: 54.5 MB). Free memory was 90.7 MB in the beginning and 176.7 MB in the end (delta: -86.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 01:25:17,773 INFO L168 Benchmark]: RCFGBuilder took 294.81 ms. Allocated memory is still 197.7 MB. Free memory was 176.7 MB in the beginning and 162.5 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-20 01:25:17,774 INFO L168 Benchmark]: TraceAbstraction took 13300.87 ms. Allocated memory was 197.7 MB in the beginning and 352.8 MB in the end (delta: 155.2 MB). Free memory was 161.9 MB in the beginning and 86.7 MB in the end (delta: 75.1 MB). Peak memory consumption was 230.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:25:17,777 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 143.1 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.11 ms. Allocated memory is still 143.1 MB. Free memory was 100.7 MB in the beginning and 90.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.71 ms. Allocated memory was 143.1 MB in the beginning and 197.7 MB in the end (delta: 54.5 MB). Free memory was 90.7 MB in the beginning and 176.7 MB in the end (delta: -86.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 294.81 ms. Allocated memory is still 197.7 MB. Free memory was 176.7 MB in the beginning and 162.5 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13300.87 ms. Allocated memory was 197.7 MB in the beginning and 352.8 MB in the end (delta: 155.2 MB). Free memory was 161.9 MB in the beginning and 86.7 MB in the end (delta: 75.1 MB). Peak memory consumption was 230.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.9s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 390 SDtfs, 464 SDslu, 3050 SDs, 0 SdLazy, 3108 SolverSat, 459 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1190 GetRequests, 965 SyntacticMatches, 9 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 139 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 449 PreInvPairs, 567 NumberOfFragments, 116 HoareAnnotationTreeSize, 449 FomulaSimplifications, 3023 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 3456 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 1517 NumberOfCodeBlocks, 1443 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 1495 ConstructedInterpolants, 0 QuantifiedInterpolants, 296013 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1549 ConjunctsInSsa, 143 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 2292/3178 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 correct! Received shutdown request...