/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:31:43,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:31:43,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:31:43,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 00:31:43,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:31:43,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:31:43,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:31:43,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:31:43,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:31:43,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:31:43,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:31:43,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:31:43,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:31:43,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:31:43,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:31:43,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:31:43,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:31:43,780 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 [2020-07-21 00:31:43,799 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:31:43,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:31:43,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:31:43,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:31:43,802 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:31:43,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:31:43,803 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:31:43,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:31:43,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:31:43,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:31:43,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:31:43,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:31:43,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:31:43,805 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:31:43,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:31:43,806 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:31:43,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:31:43,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:31:43,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:31:43,806 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:31:43,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:31:43,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:31:43,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:31:43,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:31:43,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:31:43,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:31:43,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:43,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:31:43,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:31:43,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 00:31:44,077 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:31:44,094 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:31:44,099 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:31:44,100 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:31:44,101 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:31:44,101 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci03.c [2020-07-21 00:31:44,180 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da3bcfe7c/8de9884e6732405db22adce8dc6d05d1/FLAGc6c03b580 [2020-07-21 00:31:44,686 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:31:44,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci03.c [2020-07-21 00:31:44,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da3bcfe7c/8de9884e6732405db22adce8dc6d05d1/FLAGc6c03b580 [2020-07-21 00:31:45,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da3bcfe7c/8de9884e6732405db22adce8dc6d05d1 [2020-07-21 00:31:45,051 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:31:45,054 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:31:45,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:45,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:31:45,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:31:45,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:45" (1/1) ... [2020-07-21 00:31:45,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27edf361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:45, skipping insertion in model container [2020-07-21 00:31:45,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:45" (1/1) ... [2020-07-21 00:31:45,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:31:45,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:31:45,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:45,253 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:31:45,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:45,285 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:31:45,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:45 WrapperNode [2020-07-21 00:31:45,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:45,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:31:45,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:31:45,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:31:45,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:45" (1/1) ... [2020-07-21 00:31:45,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:45" (1/1) ... [2020-07-21 00:31:45,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:45" (1/1) ... [2020-07-21 00:31:45,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:45" (1/1) ... [2020-07-21 00:31:45,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:45" (1/1) ... [2020-07-21 00:31:45,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:45" (1/1) ... [2020-07-21 00:31:45,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:45" (1/1) ... [2020-07-21 00:31:45,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:31:45,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:31:45,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:31:45,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:31:45,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:45" (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 [2020-07-21 00:31:45,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:31:45,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:31:45,468 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-21 00:31:45,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:31:45,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:31:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:31:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-21 00:31:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:31:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:31:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:31:45,648 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:31:45,648 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:31:45,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:45 BoogieIcfgContainer [2020-07-21 00:31:45,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:31:45,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:31:45,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:31:45,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:31:45,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:31:45" (1/3) ... [2020-07-21 00:31:45,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118768d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:45, skipping insertion in model container [2020-07-21 00:31:45,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:45" (2/3) ... [2020-07-21 00:31:45,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118768d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:45, skipping insertion in model container [2020-07-21 00:31:45,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:45" (3/3) ... [2020-07-21 00:31:45,661 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci03.c [2020-07-21 00:31:45,672 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:31:45,680 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:31:45,695 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:31:45,744 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:31:45,744 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:31:45,745 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:31:45,745 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:31:45,745 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:31:45,745 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:31:45,746 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:31:45,746 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:31:45,776 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 00:31:45,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 00:31:45,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:45,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:45,785 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:45,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:45,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-07-21 00:31:45,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:45,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204013820] [2020-07-21 00:31:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:45,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:31:45,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:45,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:31:45,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:31:45,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:45,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204013820] [2020-07-21 00:31:45,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:45,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:31:45,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833770727] [2020-07-21 00:31:45,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:31:45,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:45,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:31:45,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:45,982 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 00:31:46,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:46,105 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-21 00:31:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:31:46,112 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 00:31:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:46,131 INFO L225 Difference]: With dead ends: 36 [2020-07-21 00:31:46,131 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 00:31:46,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:31:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 00:31:46,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 00:31:46,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 00:31:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 00:31:46,206 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-07-21 00:31:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:46,206 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 00:31:46,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:31:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 00:31:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 00:31:46,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:46,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:46,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:46,412 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:46,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:46,413 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2020-07-21 00:31:46,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:46,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465347214] [2020-07-21 00:31:46,415 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:46,443 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:31:46,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:46,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:31:46,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:31:46,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:46,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465347214] [2020-07-21 00:31:46,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:46,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:31:46,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924547572] [2020-07-21 00:31:46,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:31:46,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:46,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:31:46,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:46,486 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-07-21 00:31:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:46,555 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-07-21 00:31:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:31:46,556 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 00:31:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:46,558 INFO L225 Difference]: With dead ends: 28 [2020-07-21 00:31:46,558 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 00:31:46,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:31:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 00:31:46,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-21 00:31:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 00:31:46,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 00:31:46,568 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-07-21 00:31:46,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:46,568 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 00:31:46,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:31:46,569 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 00:31:46,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 00:31:46,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:46,570 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:46,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:46,784 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:46,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:46,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-07-21 00:31:46,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:46,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985033492] [2020-07-21 00:31:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:46,814 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:46,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:46,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 00:31:46,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 00:31:46,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:46,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985033492] [2020-07-21 00:31:46,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:46,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 00:31:46,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105044429] [2020-07-21 00:31:46,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 00:31:46,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:46,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 00:31:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:31:46,889 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-07-21 00:31:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:47,008 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-07-21 00:31:47,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:31:47,010 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-21 00:31:47,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:47,012 INFO L225 Difference]: With dead ends: 39 [2020-07-21 00:31:47,012 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 00:31:47,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:31:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 00:31:47,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 00:31:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 00:31:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 00:31:47,029 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2020-07-21 00:31:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:47,031 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 00:31:47,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 00:31:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 00:31:47,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 00:31:47,035 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:47,036 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:47,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:47,249 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:47,250 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-07-21 00:31:47,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:47,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005545060] [2020-07-21 00:31:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:47,290 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:31:47,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:47,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:31:47,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 00:31:47,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:47,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:47,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 00:31:47,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005545060] [2020-07-21 00:31:47,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:47,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-07-21 00:31:47,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975681700] [2020-07-21 00:31:47,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:31:47,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:47,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:31:47,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:31:47,541 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 10 states. [2020-07-21 00:31:47,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:47,694 INFO L93 Difference]: Finished difference Result 40 states and 57 transitions. [2020-07-21 00:31:47,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:31:47,695 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-21 00:31:47,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:47,699 INFO L225 Difference]: With dead ends: 40 [2020-07-21 00:31:47,699 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 00:31:47,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:31:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 00:31:47,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-21 00:31:47,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 00:31:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 50 transitions. [2020-07-21 00:31:47,724 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 50 transitions. Word has length 28 [2020-07-21 00:31:47,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:47,724 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 50 transitions. [2020-07-21 00:31:47,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:31:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 50 transitions. [2020-07-21 00:31:47,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-21 00:31:47,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:47,736 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:47,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:47,953 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:47,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:47,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1197309312, now seen corresponding path program 2 times [2020-07-21 00:31:47,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:47,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909214530] [2020-07-21 00:31:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:48,000 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:48,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:48,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:31:48,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 221 proven. 13 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-07-21 00:31:48,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:48,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 126 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-07-21 00:31:48,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909214530] [2020-07-21 00:31:48,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:48,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 00:31:48,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446877413] [2020-07-21 00:31:48,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:31:48,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:48,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:31:48,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:31:48,626 INFO L87 Difference]: Start difference. First operand 34 states and 50 transitions. Second operand 11 states. [2020-07-21 00:31:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:48,777 INFO L93 Difference]: Finished difference Result 66 states and 114 transitions. [2020-07-21 00:31:48,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:31:48,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2020-07-21 00:31:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:48,780 INFO L225 Difference]: With dead ends: 66 [2020-07-21 00:31:48,780 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 00:31:48,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 171 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:31:48,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 00:31:48,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-07-21 00:31:48,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 00:31:48,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2020-07-21 00:31:48,791 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 94 [2020-07-21 00:31:48,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:48,792 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2020-07-21 00:31:48,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:31:48,792 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2020-07-21 00:31:48,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-21 00:31:48,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:48,794 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:49,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:49,003 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:49,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:49,004 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 3 times [2020-07-21 00:31:49,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:49,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990483931] [2020-07-21 00:31:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:49,053 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:49,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:49,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:31:49,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 170 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-07-21 00:31:49,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:49,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:49,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:49,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:49,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:49,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:50,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:50,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 182 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-07-21 00:31:50,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990483931] [2020-07-21 00:31:50,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:50,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:31:50,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293059528] [2020-07-21 00:31:50,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:31:50,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:50,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:31:50,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:31:50,072 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand 17 states. [2020-07-21 00:31:50,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:50,465 INFO L93 Difference]: Finished difference Result 79 states and 126 transitions. [2020-07-21 00:31:50,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 00:31:50,466 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-07-21 00:31:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:50,468 INFO L225 Difference]: With dead ends: 79 [2020-07-21 00:31:50,468 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 00:31:50,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:31:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 00:31:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-07-21 00:31:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 00:31:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2020-07-21 00:31:50,495 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 97 [2020-07-21 00:31:50,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:50,496 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2020-07-21 00:31:50,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:31:50,496 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2020-07-21 00:31:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-21 00:31:50,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:50,503 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:50,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:50,705 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:50,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:50,706 INFO L82 PathProgramCache]: Analyzing trace with hash 946234379, now seen corresponding path program 4 times [2020-07-21 00:31:50,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:50,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138373262] [2020-07-21 00:31:50,707 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:50,775 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:31:50,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:50,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:31:50,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-07-21 00:31:50,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:51,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-07-21 00:31:51,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138373262] [2020-07-21 00:31:51,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:51,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 16 [2020-07-21 00:31:51,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304247940] [2020-07-21 00:31:51,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 00:31:51,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:51,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 00:31:51,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:31:51,792 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 16 states. [2020-07-21 00:31:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:52,016 INFO L93 Difference]: Finished difference Result 66 states and 96 transitions. [2020-07-21 00:31:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:31:52,017 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 110 [2020-07-21 00:31:52,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:52,021 INFO L225 Difference]: With dead ends: 66 [2020-07-21 00:31:52,021 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 00:31:52,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 196 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:31:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 00:31:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-21 00:31:52,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 00:31:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 89 transitions. [2020-07-21 00:31:52,035 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 89 transitions. Word has length 110 [2020-07-21 00:31:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:52,036 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 89 transitions. [2020-07-21 00:31:52,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 00:31:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 89 transitions. [2020-07-21 00:31:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-07-21 00:31:52,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:52,045 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 51, 31, 31, 31, 31, 31, 31, 31, 20, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:52,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:52,259 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:52,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1687252273, now seen corresponding path program 5 times [2020-07-21 00:31:52,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:52,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652907929] [2020-07-21 00:31:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:52,375 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:52,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:52,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 00:31:52,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10947 backedges. 5989 proven. 843 refuted. 0 times theorem prover too weak. 4115 trivial. 0 not checked. [2020-07-21 00:31:52,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:54,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:54,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:55,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:55,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:55,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:55,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:55,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:55,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:55,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:56,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:56,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10947 backedges. 672 proven. 2688 refuted. 0 times theorem prover too weak. 7587 trivial. 0 not checked. [2020-07-21 00:31:56,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652907929] [2020-07-21 00:31:56,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:56,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 00:31:56,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934800454] [2020-07-21 00:31:56,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 00:31:56,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:56,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 00:31:56,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:31:56,158 INFO L87 Difference]: Start difference. First operand 60 states and 89 transitions. Second operand 25 states. [2020-07-21 00:31:56,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:56,857 INFO L93 Difference]: Finished difference Result 143 states and 264 transitions. [2020-07-21 00:31:56,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 00:31:56,858 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 437 [2020-07-21 00:31:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:56,863 INFO L225 Difference]: With dead ends: 143 [2020-07-21 00:31:56,863 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 00:31:56,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 829 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 00:31:56,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 00:31:56,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2020-07-21 00:31:56,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 00:31:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2020-07-21 00:31:56,878 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 437 [2020-07-21 00:31:56,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:56,879 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2020-07-21 00:31:56,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 00:31:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2020-07-21 00:31:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-07-21 00:31:56,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:56,887 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 46, 28, 28, 28, 28, 28, 28, 28, 18, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:57,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:57,100 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:57,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:57,101 INFO L82 PathProgramCache]: Analyzing trace with hash 165459912, now seen corresponding path program 6 times [2020-07-21 00:31:57,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:57,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461538309] [2020-07-21 00:31:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:57,252 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:57,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:57,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 00:31:57,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8931 backedges. 1112 proven. 2209 refuted. 0 times theorem prover too weak. 5610 trivial. 0 not checked. [2020-07-21 00:31:57,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:59,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:59,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:59,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:59,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:59,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:59,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:59,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:00,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:00,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:01,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:01,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:01,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:01,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:01,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:01,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:01,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8931 backedges. 1112 proven. 2284 refuted. 0 times theorem prover too weak. 5535 trivial. 0 not checked. [2020-07-21 00:32:01,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461538309] [2020-07-21 00:32:01,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:01,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 00:32:01,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46551160] [2020-07-21 00:32:01,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 00:32:01,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 00:32:01,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-21 00:32:01,710 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 29 states. [2020-07-21 00:32:02,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:02,586 INFO L93 Difference]: Finished difference Result 183 states and 293 transitions. [2020-07-21 00:32:02,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 00:32:02,587 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 396 [2020-07-21 00:32:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:02,590 INFO L225 Difference]: With dead ends: 183 [2020-07-21 00:32:02,591 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 00:32:02,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 739 SyntacticMatches, 25 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 00:32:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 00:32:02,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-07-21 00:32:02,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-21 00:32:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 136 transitions. [2020-07-21 00:32:02,625 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 136 transitions. Word has length 396 [2020-07-21 00:32:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:02,626 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 136 transitions. [2020-07-21 00:32:02,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 00:32:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 136 transitions. [2020-07-21 00:32:02,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2020-07-21 00:32:02,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:02,633 INFO L422 BasicCegarLoop]: trace histogram [93, 93, 75, 46, 46, 46, 46, 46, 46, 46, 29, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:02,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:02,836 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:02,837 INFO L82 PathProgramCache]: Analyzing trace with hash -139440574, now seen corresponding path program 7 times [2020-07-21 00:32:02,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:02,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735884714] [2020-07-21 00:32:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:03,034 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:32:03,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:03,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 00:32:03,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24027 backedges. 2194 proven. 4514 refuted. 0 times theorem prover too weak. 17319 trivial. 0 not checked. [2020-07-21 00:32:03,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:06,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:06,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:07,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:07,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:07,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:07,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:09,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:09,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:09,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:09,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:09,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:10,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:10,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 24027 backedges. 2194 proven. 4622 refuted. 0 times theorem prover too weak. 17211 trivial. 0 not checked. [2020-07-21 00:32:10,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735884714] [2020-07-21 00:32:10,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:10,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 33 [2020-07-21 00:32:10,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513903514] [2020-07-21 00:32:10,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 00:32:10,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:10,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 00:32:10,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 00:32:10,363 INFO L87 Difference]: Start difference. First operand 99 states and 136 transitions. Second operand 33 states. [2020-07-21 00:32:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:11,714 INFO L93 Difference]: Finished difference Result 221 states and 369 transitions. [2020-07-21 00:32:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 00:32:11,715 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 641 [2020-07-21 00:32:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:11,718 INFO L225 Difference]: With dead ends: 221 [2020-07-21 00:32:11,718 INFO L226 Difference]: Without dead ends: 131 [2020-07-21 00:32:11,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1312 GetRequests, 1221 SyntacticMatches, 29 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=987, Invalid=3045, Unknown=0, NotChecked=0, Total=4032 [2020-07-21 00:32:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-21 00:32:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2020-07-21 00:32:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-21 00:32:11,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 158 transitions. [2020-07-21 00:32:11,734 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 158 transitions. Word has length 641 [2020-07-21 00:32:11,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:11,735 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 158 transitions. [2020-07-21 00:32:11,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 00:32:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 158 transitions. [2020-07-21 00:32:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 00:32:11,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:11,739 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:11,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:11,955 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:11,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:11,956 INFO L82 PathProgramCache]: Analyzing trace with hash -211711407, now seen corresponding path program 8 times [2020-07-21 00:32:11,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:11,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173245194] [2020-07-21 00:32:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:12,223 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:12,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:12,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 00:32:12,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2270 refuted. 0 times theorem prover too weak. 9756 trivial. 0 not checked. [2020-07-21 00:32:12,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:14,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:15,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:15,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:15,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:16,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:16,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:16,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:16,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:16,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:16,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:32:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2347 refuted. 0 times theorem prover too weak. 9679 trivial. 0 not checked. [2020-07-21 00:32:16,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173245194] [2020-07-21 00:32:16,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:16,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 00:32:16,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491150394] [2020-07-21 00:32:16,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:32:16,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:16,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:32:16,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:32:16,538 INFO L87 Difference]: Start difference. First operand 113 states and 158 transitions. Second operand 20 states. [2020-07-21 00:32:16,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:16,840 INFO L93 Difference]: Finished difference Result 120 states and 169 transitions. [2020-07-21 00:32:16,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:32:16,841 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 464 [2020-07-21 00:32:16,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:16,846 INFO L225 Difference]: With dead ends: 120 [2020-07-21 00:32:16,846 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 00:32:16,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 892 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 00:32:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 00:32:16,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-07-21 00:32:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-21 00:32:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 165 transitions. [2020-07-21 00:32:16,862 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 165 transitions. Word has length 464 [2020-07-21 00:32:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:16,863 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 165 transitions. [2020-07-21 00:32:16,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:32:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 165 transitions. [2020-07-21 00:32:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 00:32:16,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:16,870 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:17,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:17,084 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:17,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1020040988, now seen corresponding path program 9 times [2020-07-21 00:32:17,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:17,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421583329] [2020-07-21 00:32:17,085 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:17,466 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:17,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:17,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 220 conjunts are in the unsatisfiable core [2020-07-21 00:32:17,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 00:32:18,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:19,974 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:32:20,156 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:32:20,357 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:32:20,552 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:32:21,885 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 00:32:22,306 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 00:32:22,749 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 00:32:23,158 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 00:32:24,727 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:32:24,922 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:32:25,115 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:32:25,311 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:32:26,321 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 00:32:27,294 WARN L193 SmtUtils]: Spent 966.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 00:32:28,307 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 00:32:29,376 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 00:32:31,017 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:32:31,213 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:32:31,423 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:32:31,618 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:32:33,088 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 00:32:33,499 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 00:32:33,918 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 00:32:34,345 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 00:32:36,733 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 491 [2020-07-21 00:32:39,153 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification that was a NOOP. DAG size: 491 [2020-07-21 00:32:41,594 WARN L193 SmtUtils]: Spent 2.43 s on a formula simplification that was a NOOP. DAG size: 493 [2020-07-21 00:32:44,056 WARN L193 SmtUtils]: Spent 2.45 s on a formula simplification that was a NOOP. DAG size: 493 [2020-07-21 00:32:45,970 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:32:46,179 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:32:46,408 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:32:46,630 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:32:47,461 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:32:47,676 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:32:47,787 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:32:48,264 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 00:32:48,710 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 00:32:49,187 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 00:32:49,642 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 00:32:50,187 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 269 [2020-07-21 00:32:50,641 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-07-21 00:32:51,092 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-07-21 00:32:51,561 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-07-21 00:32:52,010 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-07-21 00:32:52,456 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2020-07-21 00:32:52,901 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-07-21 00:32:53,310 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2020-07-21 00:32:53,715 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-07-21 00:32:54,133 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 00:32:54,577 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-07-21 00:32:54,972 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-07-21 00:32:55,376 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-07-21 00:32:55,781 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-07-21 00:32:56,171 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-07-21 00:32:56,530 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-07-21 00:32:56,895 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-07-21 00:32:57,227 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-07-21 00:32:57,590 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-07-21 00:32:57,926 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-07-21 00:32:58,246 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-07-21 00:32:58,555 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-07-21 00:32:58,865 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-21 00:32:59,193 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-07-21 00:32:59,496 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-21 00:32:59,795 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-07-21 00:33:00,071 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-21 00:33:00,342 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-07-21 00:33:00,609 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-07-21 00:33:00,868 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-07-21 00:33:01,121 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-07-21 00:33:01,369 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-07-21 00:33:01,607 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-07-21 00:33:01,844 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-07-21 00:33:02,071 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-07-21 00:33:02,291 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-21 00:33:02,500 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-07-21 00:33:02,707 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-07-21 00:33:02,916 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-21 00:33:03,118 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-21 00:33:03,306 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-07-21 00:33:03,504 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-07-21 00:33:03,696 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 00:33:03,883 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-07-21 00:33:04,050 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-21 00:33:04,228 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:33:04,386 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-07-21 00:33:04,536 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-07-21 00:33:04,681 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-07-21 00:33:04,819 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-07-21 00:33:04,950 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 00:33:05,071 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 00:33:05,192 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 00:33:05,317 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 00:33:05,430 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 00:33:05,534 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 00:33:05,638 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 00:33:07,644 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:07,757 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:07,874 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:07,990 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:08,113 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 00:33:08,234 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 00:33:08,343 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 00:33:08,460 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 00:33:08,565 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 00:33:08,668 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-21 00:33:12,792 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:12,906 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:13,027 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:13,148 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:13,963 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:33:14,199 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:33:14,444 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:33:14,693 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:33:17,540 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:17,657 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:17,782 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:17,908 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:20,815 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:20,937 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:21,077 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:21,203 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:22,059 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:33:22,303 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:33:22,555 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:33:22,813 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:33:23,834 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:23,956 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:24,083 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:24,210 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:24,727 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 00:33:25,258 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 00:33:25,780 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 00:33:26,297 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 00:33:27,359 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:27,483 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:27,618 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:27,747 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:28,830 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:33:29,085 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:33:29,365 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:33:29,646 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:33:30,799 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 00:33:31,973 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 00:33:33,123 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 00:33:34,289 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 00:33:35,556 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:35,681 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:35,831 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:35,968 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:36,959 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:33:37,218 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:33:37,487 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:33:37,752 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:33:38,028 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-07-21 00:33:38,303 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-21 00:33:38,560 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-07-21 00:33:38,818 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-07-21 00:33:39,067 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-21 00:33:39,304 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-07-21 00:33:39,539 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-07-21 00:33:39,764 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-07-21 00:33:39,986 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-21 00:33:40,202 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-21 00:33:40,412 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-07-21 00:33:40,615 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-21 00:33:40,804 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-21 00:33:40,988 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 00:33:41,163 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-07-21 00:33:41,340 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-07-21 00:33:41,508 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-21 00:33:41,665 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 00:33:41,817 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 00:33:41,979 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-07-21 00:33:42,122 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 00:33:42,262 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 00:33:42,396 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 00:33:42,519 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-21 00:33:42,635 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 00:33:42,749 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 00:33:42,858 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 00:33:47,482 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:47,619 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:47,766 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:47,922 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:51,877 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:52,010 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:52,159 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:52,309 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:53,404 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:33:53,696 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:33:53,974 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:33:54,267 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:33:55,667 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:55,806 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:55,948 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:56,093 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:33:56,628 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 00:33:57,187 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 00:33:57,744 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 00:33:58,303 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 00:33:59,745 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:33:59,896 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:34:00,051 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:34:00,201 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:34:00,358 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 00:34:00,508 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 00:34:00,657 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 00:34:00,796 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 00:34:00,925 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 00:34:01,055 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 00:34:01,188 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 00:34:01,305 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 00:34:01,414 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 00:34:06,470 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:34:06,624 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:34:06,780 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:34:06,934 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:34:08,107 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:34:08,398 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 00:34:08,710 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:34:09,013 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 00:34:13,097 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:34:13,243 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 00:34:13,399 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:34:13,558 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 00:34:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 00:34:16,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421583329] [2020-07-21 00:34:16,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:34:16,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-21 00:34:16,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650471739] [2020-07-21 00:34:16,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 00:34:16,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:34:16,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 00:34:16,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 00:34:16,600 INFO L87 Difference]: Start difference. First operand 116 states and 165 transitions. Second operand 36 states. [2020-07-21 00:34:17,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:34:17,315 INFO L93 Difference]: Finished difference Result 123 states and 178 transitions. [2020-07-21 00:34:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 00:34:17,319 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 750 [2020-07-21 00:34:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:34:17,322 INFO L225 Difference]: With dead ends: 123 [2020-07-21 00:34:17,322 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 00:34:17,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1502 GetRequests, 1301 SyntacticMatches, 164 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3526 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 00:34:17,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 00:34:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 00:34:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 00:34:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 00:34:17,325 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2020-07-21 00:34:17,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:34:17,325 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 00:34:17,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 00:34:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 00:34:17,325 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 00:34:17,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:34:17,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 00:34:18,403 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 7 [2020-07-21 00:34:19,695 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 97 DAG size of output: 44 [2020-07-21 00:34:19,700 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 00:34:19,700 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 00:34:19,700 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-21 00:34:19,700 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-21 00:34:19,701 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (<= 1 |fibonacci_#t~ret0|)) (.cse2 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse3 (<= 7 |fibonacci_#in~n|)) (.cse1 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and .cse0 (<= 3 fibonacci_~n) (<= |fibonacci_#in~n| 3) .cse1) (and .cse2 (<= |fibonacci_#in~n| 5) (<= 3 |fibonacci_#t~ret0|) (<= 5 |fibonacci_#in~n|) .cse1) (and .cse0 .cse2 (<= 2 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 2) .cse1) (and (<= 5 |fibonacci_#t~ret0|) .cse2 (<= |fibonacci_#in~n| 6) (<= 6 |fibonacci_#in~n|) .cse1) (and .cse2 (<= 8 |fibonacci_#t~ret0|) (<= fibonacci_~n 7) .cse3) (and .cse2 (<= |fibonacci_#in~n| 8) .cse3 .cse1 (<= 13 |fibonacci_#t~ret0|)) (and .cse2 (<= 2 |fibonacci_#t~ret0|) (<= 4 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 4) .cse1) (and .cse2 .cse3 (<= 21 |fibonacci_#t~ret0|) .cse1))) [2020-07-21 00:34:19,701 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 00:34:19,701 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-21 00:34:19,701 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-21 00:34:19,701 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-21 00:34:19,701 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 00:34:19,701 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:34:19,701 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:34:19,701 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 00:34:19,701 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 00:34:19,701 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 00:34:19,702 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-07-21 00:34:19,702 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-07-21 00:34:19,702 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-07-21 00:34:19,702 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-07-21 00:34:19,702 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-21 00:34:19,702 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-07-21 00:34:19,702 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-07-21 00:34:19,702 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-07-21 00:34:19,702 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-07-21 00:34:19,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:34:19 BoogieIcfgContainer [2020-07-21 00:34:19,707 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:34:19,708 INFO L168 Benchmark]: Toolchain (without parser) took 154656.29 ms. Allocated memory was 145.2 MB in the beginning and 666.9 MB in the end (delta: 521.7 MB). Free memory was 101.5 MB in the beginning and 510.2 MB in the end (delta: -408.7 MB). Peak memory consumption was 583.0 MB. Max. memory is 7.1 GB. [2020-07-21 00:34:19,709 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 145.2 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 00:34:19,709 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.15 ms. Allocated memory is still 145.2 MB. Free memory was 101.3 MB in the beginning and 91.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:34:19,710 INFO L168 Benchmark]: Boogie Preprocessor took 29.41 ms. Allocated memory is still 145.2 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. [2020-07-21 00:34:19,710 INFO L168 Benchmark]: RCFGBuilder took 336.73 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 90.4 MB in the beginning and 170.0 MB in the end (delta: -79.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 00:34:19,710 INFO L168 Benchmark]: TraceAbstraction took 154053.23 ms. Allocated memory was 202.4 MB in the beginning and 666.9 MB in the end (delta: 464.5 MB). Free memory was 169.4 MB in the beginning and 510.2 MB in the end (delta: -340.8 MB). Peak memory consumption was 593.7 MB. Max. memory is 7.1 GB. [2020-07-21 00:34:19,712 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 145.2 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.15 ms. Allocated memory is still 145.2 MB. Free memory was 101.3 MB in the beginning and 91.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.41 ms. Allocated memory is still 145.2 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 336.73 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 90.4 MB in the beginning and 170.0 MB in the end (delta: -79.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 154053.23 ms. Allocated memory was 202.4 MB in the beginning and 666.9 MB in the end (delta: 464.5 MB). Free memory was 169.4 MB in the beginning and 510.2 MB in the end (delta: -340.8 MB). Peak memory consumption was 593.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 151.7s, OverallIterations: 12, TraceHistogramMax: 109, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 308 SDtfs, 1075 SDslu, 1669 SDs, 0 SdLazy, 2061 SolverSat, 1265 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6205 GetRequests, 5608 SyntacticMatches, 288 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5947 ImplicationChecksByTransitivity, 7.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=11, 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, 44 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 209 PreInvPairs, 291 NumberOfFragments, 136 HoareAnnotationTreeSize, 209 FomulaSimplifications, 828 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2589 FormulaSimplificationTreeSizeReductionInter, 1.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 142.1s InterpolantComputationTime, 3073 NumberOfCodeBlocks, 2357 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 6069 ConstructedInterpolants, 0 QuantifiedInterpolants, 5484005 SizeOfPredicates, 82 NumberOfNonLiveVariables, 5252 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 21 InterpolantComputations, 3 PerfectInterpolantSequences, 148958/181608 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...