/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 NUM_VARIABLES --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-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:56:13,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:56:13,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:56:13,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:56:13,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:56:13,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:56:13,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:56:13,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:56:13,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:56:13,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:56:13,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:56:13,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:56:13,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:56:13,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:56:13,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:56:13,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:56:13,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:56:13,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:56:13,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:56:13,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:56:13,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:56:13,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:56:13,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:56:13,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:56:13,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:56:13,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:56:13,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:56:13,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:56:13,474 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 16:56:13,490 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:56:13,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:56:13,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:56:13,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:56:13,492 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:56:13,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:56:13,493 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:56:13,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:56:13,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:56:13,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:56:13,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:56:13,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:56:13,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:56:13,494 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:56:13,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:56:13,494 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:56:13,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:56:13,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:56:13,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:56:13,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:56:13,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:56:13,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:56:13,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:56:13,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:56:13,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:56:13,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:56:13,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:13,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:56:13,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:56:13,497 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 -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:56:13,824 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:56:13,843 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:56:13,847 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:56:13,850 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:56:13,854 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:56:13,856 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-07-20 16:56:13,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2de601539/70f962ef3ace4f4daae1e45fe960150c/FLAG605e991f1 [2020-07-20 16:56:14,485 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:56:14,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-07-20 16:56:14,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2de601539/70f962ef3ace4f4daae1e45fe960150c/FLAG605e991f1 [2020-07-20 16:56:14,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2de601539/70f962ef3ace4f4daae1e45fe960150c [2020-07-20 16:56:14,928 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:56:14,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:56:14,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:56:14,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:56:14,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:56:14,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:56:14" (1/1) ... [2020-07-20 16:56:14,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e0812af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:14, skipping insertion in model container [2020-07-20 16:56:14,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:56:14" (1/1) ... [2020-07-20 16:56:14,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:56:14,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:56:15,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:56:15,216 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:56:15,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:56:15,249 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:56:15,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:15 WrapperNode [2020-07-20 16:56:15,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:56:15,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:56:15,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:56:15,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:56:15,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:15" (1/1) ... [2020-07-20 16:56:15,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:15" (1/1) ... [2020-07-20 16:56:15,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:15" (1/1) ... [2020-07-20 16:56:15,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:15" (1/1) ... [2020-07-20 16:56:15,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:15" (1/1) ... [2020-07-20 16:56:15,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:15" (1/1) ... [2020-07-20 16:56:15,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:15" (1/1) ... [2020-07-20 16:56:15,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:56:15,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:56:15,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:56:15,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:56:15,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:56:15,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:56:15,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:56:15,479 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-20 16:56:15,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:56:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 16:56:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:56:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-20 16:56:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:56:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:56:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:56:15,688 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:56:15,689 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 16:56:15,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:56:15 BoogieIcfgContainer [2020-07-20 16:56:15,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:56:15,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:56:15,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:56:15,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:56:15,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:56:14" (1/3) ... [2020-07-20 16:56:15,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7883662b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:56:15, skipping insertion in model container [2020-07-20 16:56:15,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:15" (2/3) ... [2020-07-20 16:56:15,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7883662b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:56:15, skipping insertion in model container [2020-07-20 16:56:15,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:56:15" (3/3) ... [2020-07-20 16:56:15,734 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-07-20 16:56:15,768 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:56:15,789 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:56:15,823 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:56:15,870 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:56:15,870 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:56:15,870 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:56:15,871 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:56:15,871 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:56:15,871 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:56:15,871 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:56:15,872 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:56:15,894 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 16:56:15,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 16:56:15,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:15,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:15,902 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:15,908 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-20 16:56:15,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:15,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173084249] [2020-07-20 16:56:15,917 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 [2020-07-20 16:56:15,989 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:15,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:15,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:56:16,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:56:16,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:56:16,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173084249] [2020-07-20 16:56:16,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:56:16,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:56:16,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970055634] [2020-07-20 16:56:16,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:56:16,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:16,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:56:16,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:56:16,123 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 16:56:16,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:16,232 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-20 16:56:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:56:16,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 16:56:16,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:16,246 INFO L225 Difference]: With dead ends: 35 [2020-07-20 16:56:16,246 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 16:56:16,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:56:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 16:56:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 16:56:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 16:56:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 16:56:16,301 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-20 16:56:16,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:16,302 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 16:56:16,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:56:16,302 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 16:56:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 16:56:16,304 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:16,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:16,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:16,520 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-20 16:56:16,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:16,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439054632] [2020-07-20 16:56:16,523 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 [2020-07-20 16:56:16,551 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:16,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:16,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:56:16,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:56:16,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:56:16,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439054632] [2020-07-20 16:56:16,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:56:16,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:56:16,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431966164] [2020-07-20 16:56:16,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:56:16,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:16,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:56:16,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:56:16,613 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-20 16:56:16,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:16,704 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-20 16:56:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:56:16,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 16:56:16,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:16,707 INFO L225 Difference]: With dead ends: 27 [2020-07-20 16:56:16,708 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 16:56:16,710 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 [2020-07-20 16:56:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 16:56:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 16:56:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 16:56:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 16:56:16,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-20 16:56:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:16,721 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 16:56:16,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:56:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 16:56:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 16:56:16,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:16,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:16,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:16,938 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:16,940 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-20 16:56:16,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:16,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70223827] [2020-07-20 16:56:16,946 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 [2020-07-20 16:56:16,994 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:16,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:16,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 16:56:16,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 16:56:17,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:17,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:56:17,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70223827] [2020-07-20 16:56:17,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:17,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 16:56:17,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042663340] [2020-07-20 16:56:17,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 16:56:17,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:17,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 16:56:17,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 16:56:17,362 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 16:56:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:17,501 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-20 16:56:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:56:17,502 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 16:56:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:17,504 INFO L225 Difference]: With dead ends: 32 [2020-07-20 16:56:17,505 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 16:56:17,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:56:17,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 16:56:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 16:56:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 16:56:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 16:56:17,516 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-20 16:56:17,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:17,517 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 16:56:17,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 16:56:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 16:56:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 16:56:17,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:17,519 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:17,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:17,735 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:17,736 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-20 16:56:17,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:17,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640808339] [2020-07-20 16:56:17,736 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 [2020-07-20 16:56:17,768 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:17,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:17,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 16:56:17,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 16:56:17,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:17,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:56:18,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640808339] [2020-07-20 16:56:18,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:18,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 16:56:18,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767499162] [2020-07-20 16:56:18,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 16:56:18,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:18,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 16:56:18,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 16:56:18,037 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-20 16:56:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:18,161 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-20 16:56:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:56:18,162 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 16:56:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:18,164 INFO L225 Difference]: With dead ends: 37 [2020-07-20 16:56:18,164 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 16:56:18,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:56:18,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 16:56:18,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-20 16:56:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 16:56:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 16:56:18,195 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-20 16:56:18,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:18,196 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 16:56:18,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 16:56:18,198 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 16:56:18,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 16:56:18,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:18,200 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:18,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:18,417 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:18,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:18,418 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-20 16:56:18,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:18,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470899210] [2020-07-20 16:56:18,420 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 [2020-07-20 16:56:18,463 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:18,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:18,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:56:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:56:18,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:18,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:18,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:18,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:18,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 16:56:18,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470899210] [2020-07-20 16:56:18,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:18,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 16:56:18,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520620614] [2020-07-20 16:56:18,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 16:56:18,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:18,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 16:56:18,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:56:18,851 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-20 16:56:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:19,009 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-20 16:56:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 16:56:19,011 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 16:56:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:19,013 INFO L225 Difference]: With dead ends: 42 [2020-07-20 16:56:19,013 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 16:56:19,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:56:19,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 16:56:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-20 16:56:19,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 16:56:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 16:56:19,027 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-20 16:56:19,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:19,028 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 16:56:19,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 16:56:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 16:56:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 16:56:19,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:19,030 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:19,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:19,240 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:19,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:19,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-20 16:56:19,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:19,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038490237] [2020-07-20 16:56:19,242 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 [2020-07-20 16:56:19,275 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:19,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:19,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:56:19,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 16:56:19,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:19,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:19,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:19,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 16:56:19,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038490237] [2020-07-20 16:56:19,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:19,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 16:56:19,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923657567] [2020-07-20 16:56:19,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 16:56:19,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:19,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 16:56:19,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:56:19,653 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-20 16:56:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:19,790 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-20 16:56:19,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 16:56:19,791 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 16:56:19,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:19,797 INFO L225 Difference]: With dead ends: 47 [2020-07-20 16:56:19,797 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 16:56:19,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:56:19,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 16:56:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-20 16:56:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 16:56:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 16:56:19,825 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-20 16:56:19,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:19,826 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 16:56:19,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 16:56:19,826 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 16:56:19,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 16:56:19,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:19,836 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:20,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:20,052 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:20,053 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-20 16:56:20,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:20,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707989506] [2020-07-20 16:56:20,054 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 [2020-07-20 16:56:20,108 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:20,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:56:20,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 16:56:20,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:20,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:20,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:20,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:20,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:20,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 16:56:20,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707989506] [2020-07-20 16:56:20,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:20,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 16:56:20,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997344450] [2020-07-20 16:56:20,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 16:56:20,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:20,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 16:56:20,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:56:20,836 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-20 16:56:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:21,004 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-20 16:56:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:56:21,004 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 16:56:21,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:21,007 INFO L225 Difference]: With dead ends: 52 [2020-07-20 16:56:21,007 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 16:56:21,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:56:21,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 16:56:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-20 16:56:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 16:56:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 16:56:21,022 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-20 16:56:21,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:21,023 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 16:56:21,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 16:56:21,023 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 16:56:21,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-20 16:56:21,026 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:21,026 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] [2020-07-20 16:56:21,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:21,241 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:21,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:21,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-20 16:56:21,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:21,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833858232] [2020-07-20 16:56:21,244 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 [2020-07-20 16:56:21,306 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:56:21,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:21,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 16:56:21,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 115 proven. 171 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-20 16:56:21,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:22,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:22,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:22,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:22,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:22,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:22,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 115 proven. 193 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-07-20 16:56:22,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833858232] [2020-07-20 16:56:22,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:22,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 21 [2020-07-20 16:56:22,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119917881] [2020-07-20 16:56:22,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 16:56:22,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:22,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 16:56:22,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-07-20 16:56:22,697 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 21 states. [2020-07-20 16:56:23,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:23,293 INFO L93 Difference]: Finished difference Result 94 states and 184 transitions. [2020-07-20 16:56:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 16:56:23,294 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-07-20 16:56:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:23,296 INFO L225 Difference]: With dead ends: 94 [2020-07-20 16:56:23,296 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 16:56:23,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 164 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=981, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 16:56:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 16:56:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-07-20 16:56:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 16:56:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-07-20 16:56:23,310 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 96 [2020-07-20 16:56:23,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:23,311 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-07-20 16:56:23,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 16:56:23,311 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-07-20 16:56:23,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 16:56:23,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:23,313 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:23,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:23,527 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:23,529 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 4 times [2020-07-20 16:56:23,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:23,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127255411] [2020-07-20 16:56:23,530 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 [2020-07-20 16:56:23,588 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:23,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:23,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:56:23,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 16:56:23,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:23,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:24,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:24,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-07-20 16:56:24,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127255411] [2020-07-20 16:56:24,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:24,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-20 16:56:24,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587096501] [2020-07-20 16:56:24,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 16:56:24,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:24,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 16:56:24,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-20 16:56:24,138 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 12 states. [2020-07-20 16:56:24,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:24,259 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-07-20 16:56:24,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:56:24,259 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-07-20 16:56:24,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:24,261 INFO L225 Difference]: With dead ends: 65 [2020-07-20 16:56:24,261 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 16:56:24,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:56:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 16:56:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-20 16:56:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 16:56:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-07-20 16:56:24,288 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 68 [2020-07-20 16:56:24,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:24,289 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-07-20 16:56:24,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 16:56:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-07-20 16:56:24,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 16:56:24,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:24,293 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:24,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:24,508 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:24,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:24,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2020-07-20 16:56:24,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:24,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153961495] [2020-07-20 16:56:24,510 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 [2020-07-20 16:56:24,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:56:24,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:24,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-20 16:56:24,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-07-20 16:56:24,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-07-20 16:56:25,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153961495] [2020-07-20 16:56:25,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:25,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2020-07-20 16:56:25,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343370489] [2020-07-20 16:56:25,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 16:56:25,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:25,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 16:56:25,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:56:25,609 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 20 states. [2020-07-20 16:56:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:25,807 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2020-07-20 16:56:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 16:56:25,809 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2020-07-20 16:56:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:25,815 INFO L225 Difference]: With dead ends: 74 [2020-07-20 16:56:25,815 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 16:56:25,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:56:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 16:56:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-07-20 16:56:25,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 16:56:25,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2020-07-20 16:56:25,844 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 109 [2020-07-20 16:56:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:25,845 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2020-07-20 16:56:25,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 16:56:25,846 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2020-07-20 16:56:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-20 16:56:25,851 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:25,851 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:26,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:26,066 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:26,067 INFO L82 PathProgramCache]: Analyzing trace with hash -344605238, now seen corresponding path program 6 times [2020-07-20 16:56:26,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:26,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485436588] [2020-07-20 16:56:26,068 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 [2020-07-20 16:56:26,136 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:56:26,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:26,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:56:26,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 536 proven. 137 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 16:56:26,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:26,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:27,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:27,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:27,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 196 proven. 320 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2020-07-20 16:56:27,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485436588] [2020-07-20 16:56:27,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:27,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 16:56:27,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367621441] [2020-07-20 16:56:27,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 16:56:27,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:27,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 16:56:27,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:56:27,484 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand 17 states. [2020-07-20 16:56:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:27,793 INFO L93 Difference]: Finished difference Result 130 states and 177 transitions. [2020-07-20 16:56:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 16:56:27,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 136 [2020-07-20 16:56:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:27,796 INFO L225 Difference]: With dead ends: 130 [2020-07-20 16:56:27,796 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 16:56:27,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 243 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2020-07-20 16:56:27,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 16:56:27,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-07-20 16:56:27,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 16:56:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2020-07-20 16:56:27,807 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 136 [2020-07-20 16:56:27,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:27,808 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2020-07-20 16:56:27,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 16:56:27,808 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2020-07-20 16:56:27,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-20 16:56:27,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:27,810 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:28,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:28,020 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:28,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:28,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1037714201, now seen corresponding path program 7 times [2020-07-20 16:56:28,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:28,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8072888] [2020-07-20 16:56:28,022 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 [2020-07-20 16:56:28,105 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:56:28,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:28,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 16:56:28,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 298 proven. 354 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2020-07-20 16:56:28,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:28,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:28,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:29,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:29,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:29,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:29,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:29,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:29,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 298 proven. 387 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2020-07-20 16:56:29,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8072888] [2020-07-20 16:56:29,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:29,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 16:56:29,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903830608] [2020-07-20 16:56:29,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 16:56:29,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:29,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 16:56:29,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-07-20 16:56:29,945 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 21 states. [2020-07-20 16:56:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:30,485 INFO L93 Difference]: Finished difference Result 129 states and 171 transitions. [2020-07-20 16:56:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 16:56:30,490 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 150 [2020-07-20 16:56:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:30,492 INFO L225 Difference]: With dead ends: 129 [2020-07-20 16:56:30,492 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 16:56:30,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 263 SyntacticMatches, 17 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=295, Invalid=761, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 16:56:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 16:56:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-07-20 16:56:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 16:56:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2020-07-20 16:56:30,522 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 150 [2020-07-20 16:56:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:30,523 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2020-07-20 16:56:30,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 16:56:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2020-07-20 16:56:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-20 16:56:30,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:30,530 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:30,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:30,744 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:30,744 INFO L82 PathProgramCache]: Analyzing trace with hash 706081956, now seen corresponding path program 8 times [2020-07-20 16:56:30,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:30,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513903514] [2020-07-20 16:56:30,745 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:30,860 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:56:30,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:30,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 16:56:30,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 463 proven. 839 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-07-20 16:56:31,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:32,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:32,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:32,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:32,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:32,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:33,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:33,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:33,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:33,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:33,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:33,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:33,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 463 proven. 891 refuted. 0 times theorem prover too weak. 1226 trivial. 0 not checked. [2020-07-20 16:56:33,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513903514] [2020-07-20 16:56:33,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:33,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-20 16:56:33,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604660360] [2020-07-20 16:56:33,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 16:56:33,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:33,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 16:56:33,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-20 16:56:33,581 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand 25 states. [2020-07-20 16:56:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:34,312 INFO L93 Difference]: Finished difference Result 150 states and 214 transitions. [2020-07-20 16:56:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 16:56:34,313 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 218 [2020-07-20 16:56:34,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:34,315 INFO L225 Difference]: With dead ends: 150 [2020-07-20 16:56:34,315 INFO L226 Difference]: Without dead ends: 89 [2020-07-20 16:56:34,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 391 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 16:56:34,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-20 16:56:34,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2020-07-20 16:56:34,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 16:56:34,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2020-07-20 16:56:34,327 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 218 [2020-07-20 16:56:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:34,328 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2020-07-20 16:56:34,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 16:56:34,328 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2020-07-20 16:56:34,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-20 16:56:34,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:34,331 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:34,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:34,545 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:34,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:34,546 INFO L82 PathProgramCache]: Analyzing trace with hash 259499213, now seen corresponding path program 9 times [2020-07-20 16:56:34,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:34,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104141928] [2020-07-20 16:56:34,547 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:34,683 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:34,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:34,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:56:34,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 153 proven. 473 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-07-20 16:56:34,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:35,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:36,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:36,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:36,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:36,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:36,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:36,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 153 proven. 513 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2020-07-20 16:56:36,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104141928] [2020-07-20 16:56:36,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:36,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-20 16:56:36,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811888205] [2020-07-20 16:56:36,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 16:56:36,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:36,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 16:56:36,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:56:36,478 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand 16 states. [2020-07-20 16:56:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:36,640 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2020-07-20 16:56:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 16:56:36,640 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 177 [2020-07-20 16:56:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:36,641 INFO L225 Difference]: With dead ends: 75 [2020-07-20 16:56:36,641 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 16:56:36,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 326 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2020-07-20 16:56:36,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 16:56:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 16:56:36,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 16:56:36,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 16:56:36,644 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 177 [2020-07-20 16:56:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:36,645 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 16:56:36,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 16:56:36,646 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 16:56:36,646 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 16:56:36,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:36,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 16:56:37,552 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2020-07-20 16:56:37,667 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 16:56:37,668 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:56:37,668 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:56:37,668 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 16:56:37,668 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 16:56:37,668 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 16:56:37,669 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-07-20 16:56:37,669 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-07-20 16:56:37,669 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-20 16:56:37,669 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-20 16:56:37,669 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-07-20 16:56:37,669 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-07-20 16:56:37,670 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-20 16:56:37,670 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-07-20 16:56:37,670 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-07-20 16:56:37,670 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-07-20 16:56:37,670 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-07-20 16:56:37,670 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (<= 2 |fibo_#in~n|)) [2020-07-20 16:56:37,670 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-20 16:56:37,671 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse3 (<= fibo_~n |fibo_#in~n|)) (.cse0 (<= |fibo_#in~n| fibo_~n))) (let ((.cse1 (and .cse3 .cse0 (<= 6 |fibo_#in~n|)))) (and (or (and .cse0 (<= |fibo_#in~n| 4)) .cse1 (= |fibo_#t~ret0| 3)) (let ((.cse2 (= |fibo_#t~ret0| 1))) (or (and .cse2 .cse3 (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3)) (and .cse2 .cse3 (<= |fibo_#in~n| 2) (<= 2 |fibo_#in~n|)) .cse1 (and (<= 4 |fibo_#in~n|) (= |fibo_#t~ret0| 2) (<= fibo_~n 4)) (and .cse3 (<= 5 fibo_~n) (<= |fibo_#in~n| 5))))))) [2020-07-20 16:56:37,671 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-07-20 16:56:37,671 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-07-20 16:56:37,671 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-07-20 16:56:37,671 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-07-20 16:56:37,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:56:37 BoogieIcfgContainer [2020-07-20 16:56:37,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 16:56:37,681 INFO L168 Benchmark]: Toolchain (without parser) took 22750.66 ms. Allocated memory was 141.0 MB in the beginning and 445.6 MB in the end (delta: 304.6 MB). Free memory was 98.8 MB in the beginning and 370.8 MB in the end (delta: -272.0 MB). Peak memory consumption was 302.7 MB. Max. memory is 7.1 GB. [2020-07-20 16:56:37,682 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 141.0 MB. Free memory was 117.2 MB in the beginning and 117.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 16:56:37,682 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.84 ms. Allocated memory is still 141.0 MB. Free memory was 98.4 MB in the beginning and 89.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 16:56:37,683 INFO L168 Benchmark]: Boogie Preprocessor took 31.75 ms. Allocated memory is still 141.0 MB. Free memory was 89.1 MB in the beginning and 87.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 16:56:37,684 INFO L168 Benchmark]: RCFGBuilder took 421.34 ms. Allocated memory was 141.0 MB in the beginning and 198.7 MB in the end (delta: 57.7 MB). Free memory was 87.7 MB in the beginning and 166.7 MB in the end (delta: -79.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 16:56:37,685 INFO L168 Benchmark]: TraceAbstraction took 21971.41 ms. Allocated memory was 198.7 MB in the beginning and 445.6 MB in the end (delta: 246.9 MB). Free memory was 166.1 MB in the beginning and 370.8 MB in the end (delta: -204.8 MB). Peak memory consumption was 312.3 MB. Max. memory is 7.1 GB. [2020-07-20 16:56:37,688 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 141.0 MB. Free memory was 117.2 MB in the beginning and 117.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 316.84 ms. Allocated memory is still 141.0 MB. Free memory was 98.4 MB in the beginning and 89.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.75 ms. Allocated memory is still 141.0 MB. Free memory was 89.1 MB in the beginning and 87.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 421.34 ms. Allocated memory was 141.0 MB in the beginning and 198.7 MB in the end (delta: 57.7 MB). Free memory was 87.7 MB in the beginning and 166.7 MB in the end (delta: -79.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21971.41 ms. Allocated memory was 198.7 MB in the beginning and 445.6 MB in the end (delta: 246.9 MB). Free memory was 166.1 MB in the beginning and 370.8 MB in the end (delta: -204.8 MB). Peak memory consumption was 312.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: 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: 20.9s, OverallIterations: 14, TraceHistogramMax: 31, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 313 SDtfs, 740 SDslu, 1408 SDs, 0 SdLazy, 1678 SolverSat, 774 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2414 GetRequests, 2045 SyntacticMatches, 118 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=13, 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, 14 MinimizatonAttempts, 66 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 143 PreInvPairs, 195 NumberOfFragments, 101 HoareAnnotationTreeSize, 143 FomulaSimplifications, 2033 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 905 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 12.9s InterpolantComputationTime, 1179 NumberOfCodeBlocks, 777 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 2305 ConstructedInterpolants, 0 QuantifiedInterpolants, 602259 SizeOfPredicates, 74 NumberOfNonLiveVariables, 2088 ConjunctsInSsa, 203 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 10468/15606 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...