/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_FUNCTIONS --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_7-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:35:06,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:35:06,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:35:06,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:35:06,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:35:06,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:35:06,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:35:06,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:35:06,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:35:06,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:35:06,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:35:06,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:35:06,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:35:06,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:35:06,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:35:06,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:35:06,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:35:06,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:35:06,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:35:06,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:35:06,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:35:06,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:35:06,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:35:06,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:35:06,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:35:06,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:35:06,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:35:06,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:35:06,343 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 13:35:06,377 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:35:06,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:35:06,382 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:35:06,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:35:06,383 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:35:06,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:35:06,383 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:35:06,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:35:06,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:35:06,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:35:06,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:35:06,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:35:06,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:35:06,384 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:35:06,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:35:06,385 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:35:06,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:35:06,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:35:06,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:35:06,386 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:35:06,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:35:06,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:35:06,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:35:06,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:35:06,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:35:06,388 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:35:06,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:06,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:35:06,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:35:06,388 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_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:35:06,717 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:35:06,737 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:35:06,741 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:35:06,743 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:35:06,743 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:35:06,745 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-07-20 13:35:06,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c377c9bf/8f03e6ed85eb4cf8abe4cec22b5bdb6f/FLAG9ab623845 [2020-07-20 13:35:07,218 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:35:07,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-07-20 13:35:07,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c377c9bf/8f03e6ed85eb4cf8abe4cec22b5bdb6f/FLAG9ab623845 [2020-07-20 13:35:07,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c377c9bf/8f03e6ed85eb4cf8abe4cec22b5bdb6f [2020-07-20 13:35:07,664 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:35:07,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:35:07,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:35:07,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:35:07,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:35:07,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:35:07" (1/1) ... [2020-07-20 13:35:07,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76c9b653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:07, skipping insertion in model container [2020-07-20 13:35:07,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:35:07" (1/1) ... [2020-07-20 13:35:07,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:35:07,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:35:07,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:35:07,906 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:35:07,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:35:07,940 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:35:07,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:07 WrapperNode [2020-07-20 13:35:07,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:35:07,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:35:07,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:35:07,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:35:07,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:07" (1/1) ... [2020-07-20 13:35:07,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:07" (1/1) ... [2020-07-20 13:35:07,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:07" (1/1) ... [2020-07-20 13:35:07,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:07" (1/1) ... [2020-07-20 13:35:07,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:07" (1/1) ... [2020-07-20 13:35:07,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:07" (1/1) ... [2020-07-20 13:35:07,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:07" (1/1) ... [2020-07-20 13:35:07,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:35:07,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:35:07,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:35:07,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:35:07,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:07" (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 13:35:08,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:35:08,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:35:08,135 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-20 13:35:08,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:35:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:35:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:35:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-20 13:35:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:35:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:35:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:35:08,324 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:35:08,325 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:35:08,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:35:08 BoogieIcfgContainer [2020-07-20 13:35:08,329 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:35:08,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:35:08,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:35:08,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:35:08,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:35:07" (1/3) ... [2020-07-20 13:35:08,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552c6c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:35:08, skipping insertion in model container [2020-07-20 13:35:08,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:35:07" (2/3) ... [2020-07-20 13:35:08,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552c6c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:35:08, skipping insertion in model container [2020-07-20 13:35:08,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:35:08" (3/3) ... [2020-07-20 13:35:08,339 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2020-07-20 13:35:08,351 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:35:08,359 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:35:08,375 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:35:08,400 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:35:08,400 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:35:08,401 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:35:08,401 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:35:08,401 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:35:08,401 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:35:08,402 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:35:08,403 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:35:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 13:35:08,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 13:35:08,433 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:08,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:08,434 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:08,441 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-20 13:35:08,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:08,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947369802] [2020-07-20 13:35:08,457 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 13:35:08,558 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:08,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:08,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:35:08,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:08,682 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 13:35:08,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:35:08,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947369802] [2020-07-20 13:35:08,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:35:08,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:35:08,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822582516] [2020-07-20 13:35:08,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:35:08,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:08,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:35:08,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:35:08,713 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 13:35:08,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:08,827 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-20 13:35:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:35:08,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 13:35:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:08,841 INFO L225 Difference]: With dead ends: 35 [2020-07-20 13:35:08,841 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 13:35:08,845 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 13:35:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 13:35:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 13:35:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 13:35:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 13:35:08,888 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-20 13:35:08,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:08,889 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 13:35:08,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:35:08,890 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 13:35:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:35:08,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:08,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:09,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:09,104 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:09,105 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-20 13:35:09,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:09,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135784346] [2020-07-20 13:35:09,107 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 13:35:09,149 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:09,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:09,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:35:09,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:09,198 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 13:35:09,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:35:09,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135784346] [2020-07-20 13:35:09,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:35:09,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:35:09,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984770279] [2020-07-20 13:35:09,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:35:09,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:09,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:35:09,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:35:09,203 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-20 13:35:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:09,266 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-20 13:35:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:35:09,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 13:35:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:09,268 INFO L225 Difference]: With dead ends: 27 [2020-07-20 13:35:09,269 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 13:35:09,270 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 13:35:09,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 13:35:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 13:35:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 13:35:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 13:35:09,279 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-20 13:35:09,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:09,280 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 13:35:09,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:35:09,280 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 13:35:09,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 13:35:09,282 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:09,282 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 13:35:09,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:09,497 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:09,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:09,498 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-20 13:35:09,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:09,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064277824] [2020-07-20 13:35:09,500 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 13:35:09,547 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:09,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:09,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:35:09,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:09,600 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 13:35:09,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:09,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:09,830 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 13:35:09,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064277824] [2020-07-20 13:35:09,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:09,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 13:35:09,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553362320] [2020-07-20 13:35:09,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:35:09,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:09,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:35:09,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:35:09,834 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 13:35:09,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:09,955 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-20 13:35:09,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:35:09,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 13:35:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:09,958 INFO L225 Difference]: With dead ends: 32 [2020-07-20 13:35:09,958 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 13:35:09,959 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 13:35:09,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 13:35:09,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 13:35:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 13:35:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 13:35:09,968 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-20 13:35:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:09,969 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 13:35:09,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:35:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 13:35:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:35:09,971 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:09,971 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 13:35:10,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:10,186 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:10,187 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-20 13:35:10,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:10,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582472196] [2020-07-20 13:35:10,189 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 13:35:10,221 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:10,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:10,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:35:10,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:10,271 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 13:35:10,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:10,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:10,502 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 13:35:10,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582472196] [2020-07-20 13:35:10,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:10,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 13:35:10,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968486728] [2020-07-20 13:35:10,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:35:10,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:10,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:35:10,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:35:10,507 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-20 13:35:10,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:10,626 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-20 13:35:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:35:10,627 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 13:35:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:10,629 INFO L225 Difference]: With dead ends: 37 [2020-07-20 13:35:10,630 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 13:35:10,630 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 13:35:10,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 13:35:10,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-20 13:35:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 13:35:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 13:35:10,640 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-20 13:35:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:10,640 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 13:35:10,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:35:10,641 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 13:35:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 13:35:10,642 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:10,642 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 13:35:10,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:10,857 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:10,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:10,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-20 13:35:10,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:10,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401405892] [2020-07-20 13:35:10,860 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 13:35:10,895 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:10,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:10,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:35:10,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:10,957 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 13:35:10,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:11,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:11,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:11,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:11,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:11,307 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 13:35:11,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401405892] [2020-07-20 13:35:11,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:11,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 13:35:11,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285069076] [2020-07-20 13:35:11,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:35:11,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:11,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:35:11,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:35:11,310 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-20 13:35:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:11,481 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-20 13:35:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:35:11,482 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 13:35:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:11,484 INFO L225 Difference]: With dead ends: 42 [2020-07-20 13:35:11,485 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 13:35:11,485 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 13:35:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 13:35:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-20 13:35:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 13:35:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 13:35:11,498 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-20 13:35:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:11,499 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 13:35:11,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:35:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 13:35:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 13:35:11,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:11,501 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 13:35:11,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:11,717 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:11,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:11,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-20 13:35:11,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:11,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351626173] [2020-07-20 13:35:11,719 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 13:35:11,756 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:11,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:11,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:35:11,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:11,809 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 13:35:11,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:12,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:12,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:12,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:12,135 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 13:35:12,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351626173] [2020-07-20 13:35:12,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:12,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 13:35:12,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261840712] [2020-07-20 13:35:12,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:35:12,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:12,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:35:12,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:35:12,138 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-20 13:35:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:12,301 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-20 13:35:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:35:12,302 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 13:35:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:12,304 INFO L225 Difference]: With dead ends: 47 [2020-07-20 13:35:12,309 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 13:35:12,312 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 13:35:12,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 13:35:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-20 13:35:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 13:35:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 13:35:12,334 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-20 13:35:12,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:12,334 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 13:35:12,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:35:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 13:35:12,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 13:35:12,341 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:12,342 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 13:35:12,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:12,559 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:12,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:12,560 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-20 13:35:12,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:12,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893754360] [2020-07-20 13:35:12,562 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 13:35:12,607 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:12,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:12,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:35:12,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:12,665 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 13:35:12,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:13,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:13,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:13,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:13,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:13,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:13,316 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 13:35:13,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893754360] [2020-07-20 13:35:13,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:13,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 13:35:13,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017747997] [2020-07-20 13:35:13,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:35:13,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:13,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:35:13,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:35:13,319 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-20 13:35:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:13,497 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-20 13:35:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:35:13,498 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 13:35:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:13,502 INFO L225 Difference]: With dead ends: 52 [2020-07-20 13:35:13,503 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 13:35:13,504 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 13:35:13,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 13:35:13,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-20 13:35:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 13:35:13,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 13:35:13,518 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-20 13:35:13,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:13,518 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 13:35:13,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:35:13,519 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 13:35:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-20 13:35:13,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:13,522 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 13:35:13,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:13,726 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:13,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:13,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-20 13:35:13,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:13,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855769202] [2020-07-20 13:35:13,728 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 13:35:13,779 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:13,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:13,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:35:13,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-20 13:35:13,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:14,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:14,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:14,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:14,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-20 13:35:14,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855769202] [2020-07-20 13:35:14,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:14,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 13:35:14,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443621726] [2020-07-20 13:35:14,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:35:14,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:14,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:35:14,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:35:14,521 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-20 13:35:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:14,669 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-20 13:35:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:35:14,671 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-20 13:35:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:14,673 INFO L225 Difference]: With dead ends: 57 [2020-07-20 13:35:14,674 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 13:35:14,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 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 13:35:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 13:35:14,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-20 13:35:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 13:35:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 13:35:14,689 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-20 13:35:14,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:14,690 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 13:35:14,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:35:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 13:35:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 13:35:14,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:14,693 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:14,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:14,907 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:14,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:14,908 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-20 13:35:14,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:14,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314252800] [2020-07-20 13:35:14,910 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 13:35:14,974 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:14,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:14,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:35:14,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-20 13:35:15,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:15,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:15,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:15,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:15,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:16,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-20 13:35:16,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314252800] [2020-07-20 13:35:16,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:16,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 13:35:16,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620839482] [2020-07-20 13:35:16,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:16,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:16,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:16,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:16,091 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-20 13:35:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:16,386 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-20 13:35:16,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:35:16,387 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-20 13:35:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:16,390 INFO L225 Difference]: With dead ends: 62 [2020-07-20 13:35:16,391 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 13:35:16,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:35:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 13:35:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-20 13:35:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 13:35:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 13:35:16,404 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-20 13:35:16,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:16,405 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 13:35:16,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 13:35:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-20 13:35:16,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:16,408 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:16,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:16,622 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:16,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:16,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-20 13:35:16,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:16,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108337205] [2020-07-20 13:35:16,624 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 13:35:16,715 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:16,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:16,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:35:16,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 506 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-07-20 13:35:16,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:17,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:17,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:17,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:17,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:17,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:17,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 532 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2020-07-20 13:35:17,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108337205] [2020-07-20 13:35:17,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:17,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 13:35:17,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836562181] [2020-07-20 13:35:17,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:35:17,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:17,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:35:17,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:35:17,948 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-20 13:35:18,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:18,137 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-20 13:35:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:35:18,138 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-20 13:35:18,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:18,144 INFO L225 Difference]: With dead ends: 67 [2020-07-20 13:35:18,144 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 13:35:18,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:35:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 13:35:18,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-20 13:35:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 13:35:18,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 13:35:18,184 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-20 13:35:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:18,184 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 13:35:18,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:35:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 13:35:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-20 13:35:18,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:18,194 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:18,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:18,396 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:18,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:18,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-20 13:35:18,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:18,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648367598] [2020-07-20 13:35:18,398 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 13:35:18,534 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:18,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:18,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:35:18,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-20 13:35:18,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:19,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:20,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:20,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:20,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:20,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:20,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-20 13:35:20,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648367598] [2020-07-20 13:35:20,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:20,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 13:35:20,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040538358] [2020-07-20 13:35:20,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:35:20,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:20,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:35:20,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:35:20,649 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-20 13:35:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:20,888 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-20 13:35:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:20,889 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-20 13:35:20,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:20,892 INFO L225 Difference]: With dead ends: 72 [2020-07-20 13:35:20,893 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 13:35:20,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 13:35:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 13:35:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-20 13:35:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 13:35:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 13:35:20,906 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-20 13:35:20,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:20,906 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 13:35:20,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:35:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 13:35:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-20 13:35:20,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:20,911 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:21,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:21,125 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:21,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:21,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1006419304, now seen corresponding path program 5 times [2020-07-20 13:35:21,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:21,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804202260] [2020-07-20 13:35:21,127 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 13:35:21,259 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:21,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:21,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:35:21,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-20 13:35:21,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:22,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:23,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:23,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:23,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:23,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:23,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-20 13:35:23,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804202260] [2020-07-20 13:35:23,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:23,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-20 13:35:23,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367513468] [2020-07-20 13:35:23,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 13:35:23,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:23,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 13:35:23,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-20 13:35:23,405 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 16 states. [2020-07-20 13:35:23,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:23,643 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-20 13:35:23,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:23,644 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 299 [2020-07-20 13:35:23,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:23,650 INFO L225 Difference]: With dead ends: 77 [2020-07-20 13:35:23,650 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 13:35:23,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 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 13:35:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 13:35:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-20 13:35:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 13:35:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 13:35:23,681 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-20 13:35:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:23,682 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 13:35:23,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 13:35:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 13:35:23,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-20 13:35:23,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:23,696 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 39, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:23,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:23,922 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:23,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:23,923 INFO L82 PathProgramCache]: Analyzing trace with hash 785285043, now seen corresponding path program 6 times [2020-07-20 13:35:23,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:23,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140221014] [2020-07-20 13:35:23,924 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 13:35:24,124 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:24,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:24,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:35:24,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2126 refuted. 0 times theorem prover too weak. 12702 trivial. 0 not checked. [2020-07-20 13:35:24,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:26,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:26,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2177 refuted. 0 times theorem prover too weak. 12651 trivial. 0 not checked. [2020-07-20 13:35:27,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140221014] [2020-07-20 13:35:27,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:27,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-20 13:35:27,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161038247] [2020-07-20 13:35:27,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:35:27,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:27,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:35:27,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:35:27,853 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 18 states. [2020-07-20 13:35:28,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:28,313 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-20 13:35:28,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:28,313 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 507 [2020-07-20 13:35:28,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:28,318 INFO L225 Difference]: With dead ends: 82 [2020-07-20 13:35:28,318 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 13:35:28,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 983 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-20 13:35:28,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 13:35:28,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-20 13:35:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 13:35:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-20 13:35:28,334 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 507 [2020-07-20 13:35:28,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:28,335 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-20 13:35:28,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:35:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-20 13:35:28,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-20 13:35:28,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:28,340 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 53, 32, 32, 32, 32, 32, 32, 32, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:28,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:28,555 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:28,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:28,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1350718391, now seen corresponding path program 6 times [2020-07-20 13:35:28,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:28,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531803562] [2020-07-20 13:35:28,558 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 13:35:28,757 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:28,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:28,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:35:28,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 648 proven. 1709 refuted. 0 times theorem prover too weak. 9325 trivial. 0 not checked. [2020-07-20 13:35:28,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:30,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:30,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:31,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:31,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:31,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:31,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:31,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:31,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:31,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:32,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 652 proven. 1756 refuted. 0 times theorem prover too weak. 9274 trivial. 0 not checked. [2020-07-20 13:35:32,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531803562] [2020-07-20 13:35:32,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:32,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-20 13:35:32,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131067025] [2020-07-20 13:35:32,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:35:32,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:32,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:35:32,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:35:32,195 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 18 states. [2020-07-20 13:35:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:32,537 INFO L93 Difference]: Finished difference Result 147 states and 749 transitions. [2020-07-20 13:35:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:32,538 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 450 [2020-07-20 13:35:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:32,541 INFO L225 Difference]: With dead ends: 147 [2020-07-20 13:35:32,541 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 13:35:32,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 868 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-20 13:35:32,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 13:35:32,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-20 13:35:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 13:35:32,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 122 transitions. [2020-07-20 13:35:32,573 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 122 transitions. Word has length 450 [2020-07-20 13:35:32,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:32,574 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 122 transitions. [2020-07-20 13:35:32,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:35:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 122 transitions. [2020-07-20 13:35:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 13:35:32,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:32,578 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:32,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:32,793 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:32,794 INFO L82 PathProgramCache]: Analyzing trace with hash -530192014, now seen corresponding path program 7 times [2020-07-20 13:35:32,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:32,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137030246] [2020-07-20 13:35:32,795 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:33,056 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:33,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:33,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:35:33,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1091 proven. 461 refuted. 0 times theorem prover too weak. 4487 trivial. 0 not checked. [2020-07-20 13:35:33,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:34,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:35,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:35,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:35,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:35,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:35,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:35,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:35,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:35,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:35,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1091 proven. 518 refuted. 0 times theorem prover too weak. 4430 trivial. 0 not checked. [2020-07-20 13:35:36,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137030246] [2020-07-20 13:35:36,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:36,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-20 13:35:36,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828004556] [2020-07-20 13:35:36,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:35:36,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:36,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:35:36,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:35:36,071 INFO L87 Difference]: Start difference. First operand 70 states and 122 transitions. Second operand 18 states. [2020-07-20 13:35:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:36,358 INFO L93 Difference]: Finished difference Result 120 states and 219 transitions. [2020-07-20 13:35:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:36,359 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 327 [2020-07-20 13:35:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:36,362 INFO L225 Difference]: With dead ends: 120 [2020-07-20 13:35:36,363 INFO L226 Difference]: Without dead ends: 108 [2020-07-20 13:35:36,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 622 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-20 13:35:36,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-20 13:35:36,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2020-07-20 13:35:36,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 13:35:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 167 transitions. [2020-07-20 13:35:36,400 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 167 transitions. Word has length 327 [2020-07-20 13:35:36,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:36,401 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 167 transitions. [2020-07-20 13:35:36,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:35:36,403 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 167 transitions. [2020-07-20 13:35:36,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-20 13:35:36,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:36,408 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 20, 20, 20, 20, 20, 20, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:36,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:36,623 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:36,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:36,624 INFO L82 PathProgramCache]: Analyzing trace with hash -301446619, now seen corresponding path program 8 times [2020-07-20 13:35:36,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:36,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795600694] [2020-07-20 13:35:36,625 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:36,839 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:36,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:36,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:35:36,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 494 proven. 479 refuted. 0 times theorem prover too weak. 3628 trivial. 0 not checked. [2020-07-20 13:35:36,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:37,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:37,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:37,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 500 proven. 505 refuted. 0 times theorem prover too weak. 3596 trivial. 0 not checked. [2020-07-20 13:35:38,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795600694] [2020-07-20 13:35:38,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:38,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-20 13:35:38,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266578038] [2020-07-20 13:35:38,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 13:35:38,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:38,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 13:35:38,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:35:38,393 INFO L87 Difference]: Start difference. First operand 90 states and 167 transitions. Second operand 14 states. [2020-07-20 13:35:38,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:38,564 INFO L93 Difference]: Finished difference Result 135 states and 267 transitions. [2020-07-20 13:35:38,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:35:38,565 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 287 [2020-07-20 13:35:38,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:38,568 INFO L225 Difference]: With dead ends: 135 [2020-07-20 13:35:38,569 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 13:35:38,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 550 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-20 13:35:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 13:35:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 93. [2020-07-20 13:35:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-20 13:35:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 181 transitions. [2020-07-20 13:35:38,594 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 181 transitions. Word has length 287 [2020-07-20 13:35:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:38,595 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 181 transitions. [2020-07-20 13:35:38,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 13:35:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 181 transitions. [2020-07-20 13:35:38,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-20 13:35:38,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:38,601 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:38,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:38,815 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:38,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1320340794, now seen corresponding path program 9 times [2020-07-20 13:35:38,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:38,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374367536] [2020-07-20 13:35:38,817 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:39,024 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:39,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:39,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:35:39,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 369 proven. 1023 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2020-07-20 13:35:39,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:40,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:40,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 375 proven. 1074 refuted. 0 times theorem prover too weak. 3564 trivial. 0 not checked. [2020-07-20 13:35:41,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374367536] [2020-07-20 13:35:41,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:41,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-20 13:35:41,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028127925] [2020-07-20 13:35:41,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:35:41,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:41,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:35:41,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:35:41,881 INFO L87 Difference]: Start difference. First operand 93 states and 181 transitions. Second operand 18 states. [2020-07-20 13:35:42,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:42,196 INFO L93 Difference]: Finished difference Result 183 states and 362 transitions. [2020-07-20 13:35:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:42,197 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 299 [2020-07-20 13:35:42,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:42,199 INFO L225 Difference]: With dead ends: 183 [2020-07-20 13:35:42,200 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 13:35:42,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 566 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-20 13:35:42,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 13:35:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-07-20 13:35:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 13:35:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 126 transitions. [2020-07-20 13:35:42,217 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 126 transitions. Word has length 299 [2020-07-20 13:35:42,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:42,218 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 126 transitions. [2020-07-20 13:35:42,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:35:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 126 transitions. [2020-07-20 13:35:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-20 13:35:42,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:42,222 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:42,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:42,436 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 10 times [2020-07-20 13:35:42,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:42,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117157238] [2020-07-20 13:35:42,438 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:42,663 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:35:42,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:42,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 167 conjunts are in the unsatisfiable core [2020-07-20 13:35:42,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-07-20 13:35:43,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-07-20 13:35:46,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117157238] [2020-07-20 13:35:46,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:46,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-20 13:35:46,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70050341] [2020-07-20 13:35:46,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 13:35:46,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:46,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 13:35:46,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-20 13:35:46,560 INFO L87 Difference]: Start difference. First operand 87 states and 126 transitions. Second operand 28 states. [2020-07-20 13:35:47,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:47,073 INFO L93 Difference]: Finished difference Result 197 states and 342 transitions. [2020-07-20 13:35:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 13:35:47,074 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 286 [2020-07-20 13:35:47,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:47,079 INFO L225 Difference]: With dead ends: 197 [2020-07-20 13:35:47,080 INFO L226 Difference]: Without dead ends: 190 [2020-07-20 13:35:47,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 534 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2020-07-20 13:35:47,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-20 13:35:47,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 147. [2020-07-20 13:35:47,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-20 13:35:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 267 transitions. [2020-07-20 13:35:47,110 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 267 transitions. Word has length 286 [2020-07-20 13:35:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:47,111 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 267 transitions. [2020-07-20 13:35:47,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 13:35:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 267 transitions. [2020-07-20 13:35:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-07-20 13:35:47,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:47,122 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 34, 26, 26, 26, 26, 26, 26, 26, 19, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:47,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:47,335 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:47,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:47,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2010709939, now seen corresponding path program 11 times [2020-07-20 13:35:47,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:47,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275311855] [2020-07-20 13:35:47,337 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:47,600 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:47,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:47,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 13:35:47,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7373 backedges. 408 proven. 1171 refuted. 0 times theorem prover too weak. 5794 trivial. 0 not checked. [2020-07-20 13:35:47,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:49,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:49,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:49,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:50,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:50,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:50,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:50,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:50,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:50,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:50,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7373 backedges. 409 proven. 1205 refuted. 0 times theorem prover too weak. 5759 trivial. 0 not checked. [2020-07-20 13:35:50,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275311855] [2020-07-20 13:35:50,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:50,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-20 13:35:50,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062239895] [2020-07-20 13:35:50,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:35:50,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:50,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:35:50,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:35:50,425 INFO L87 Difference]: Start difference. First operand 147 states and 267 transitions. Second operand 18 states. [2020-07-20 13:35:50,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:50,696 INFO L93 Difference]: Finished difference Result 253 states and 465 transitions. [2020-07-20 13:35:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:50,697 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 359 [2020-07-20 13:35:50,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:50,702 INFO L225 Difference]: With dead ends: 253 [2020-07-20 13:35:50,702 INFO L226 Difference]: Without dead ends: 147 [2020-07-20 13:35:50,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 688 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:35:50,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-20 13:35:50,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-07-20 13:35:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-20 13:35:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 247 transitions. [2020-07-20 13:35:50,733 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 247 transitions. Word has length 359 [2020-07-20 13:35:50,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:50,733 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 247 transitions. [2020-07-20 13:35:50,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:35:50,733 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 247 transitions. [2020-07-20 13:35:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-07-20 13:35:50,743 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:50,743 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 33, 22, 22, 22, 22, 22, 22, 22, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:50,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:50,959 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:50,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:50,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1433067009, now seen corresponding path program 12 times [2020-07-20 13:35:50,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:50,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487171302] [2020-07-20 13:35:50,961 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:51,205 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:51,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:51,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:35:51,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 400 proven. 736 refuted. 0 times theorem prover too weak. 4276 trivial. 0 not checked. [2020-07-20 13:35:51,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:52,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:52,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:52,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:52,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:52,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:52,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:52,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:53,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 404 proven. 756 refuted. 0 times theorem prover too weak. 4252 trivial. 0 not checked. [2020-07-20 13:35:53,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487171302] [2020-07-20 13:35:53,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:53,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-20 13:35:53,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135881557] [2020-07-20 13:35:53,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 13:35:53,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:53,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 13:35:53,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-20 13:35:53,106 INFO L87 Difference]: Start difference. First operand 147 states and 247 transitions. Second operand 16 states. [2020-07-20 13:35:53,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:53,324 INFO L93 Difference]: Finished difference Result 207 states and 351 transitions. [2020-07-20 13:35:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:35:53,325 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 310 [2020-07-20 13:35:53,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:53,331 INFO L225 Difference]: With dead ends: 207 [2020-07-20 13:35:53,331 INFO L226 Difference]: Without dead ends: 187 [2020-07-20 13:35:53,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 594 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-20 13:35:53,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-20 13:35:53,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 150. [2020-07-20 13:35:53,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-20 13:35:53,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 250 transitions. [2020-07-20 13:35:53,367 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 250 transitions. Word has length 310 [2020-07-20 13:35:53,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:53,368 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 250 transitions. [2020-07-20 13:35:53,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 13:35:53,368 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 250 transitions. [2020-07-20 13:35:53,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 13:35:53,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:53,377 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 36, 24, 24, 24, 24, 24, 24, 24, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:53,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:53,592 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:53,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:53,593 INFO L82 PathProgramCache]: Analyzing trace with hash -366796827, now seen corresponding path program 13 times [2020-07-20 13:35:53,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:53,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188369847] [2020-07-20 13:35:53,593 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:53,853 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:53,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:53,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:35:53,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6438 backedges. 755 proven. 849 refuted. 0 times theorem prover too weak. 4834 trivial. 0 not checked. [2020-07-20 13:35:54,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:55,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:56,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:56,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:56,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:56,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:56,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:56,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:56,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6438 backedges. 757 proven. 904 refuted. 0 times theorem prover too weak. 4777 trivial. 0 not checked. [2020-07-20 13:35:56,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188369847] [2020-07-20 13:35:56,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:56,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-20 13:35:56,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825292243] [2020-07-20 13:35:56,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:35:56,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:56,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:35:56,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:35:56,867 INFO L87 Difference]: Start difference. First operand 150 states and 250 transitions. Second operand 18 states. [2020-07-20 13:35:57,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:57,130 INFO L93 Difference]: Finished difference Result 178 states and 284 transitions. [2020-07-20 13:35:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:35:57,131 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 337 [2020-07-20 13:35:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:57,134 INFO L225 Difference]: With dead ends: 178 [2020-07-20 13:35:57,135 INFO L226 Difference]: Without dead ends: 161 [2020-07-20 13:35:57,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 642 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-20 13:35:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-07-20 13:35:57,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2020-07-20 13:35:57,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-20 13:35:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 204 transitions. [2020-07-20 13:35:57,158 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 204 transitions. Word has length 337 [2020-07-20 13:35:57,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:57,158 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 204 transitions. [2020-07-20 13:35:57,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:35:57,159 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 204 transitions. [2020-07-20 13:35:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-07-20 13:35:57,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:57,166 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 33, 22, 22, 22, 22, 22, 22, 22, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:35:57,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:57,380 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:57,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:57,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1671876095, now seen corresponding path program 14 times [2020-07-20 13:35:57,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:57,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930848381] [2020-07-20 13:35:57,381 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:57,694 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:57,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:57,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 13:35:57,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:35:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 453 proven. 880 refuted. 0 times theorem prover too weak. 4079 trivial. 0 not checked. [2020-07-20 13:35:57,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:35:59,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:59,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:59,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:59,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:59,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:59,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:00,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 452 proven. 916 refuted. 0 times theorem prover too weak. 4044 trivial. 0 not checked. [2020-07-20 13:36:00,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930848381] [2020-07-20 13:36:00,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:36:00,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-20 13:36:00,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065771294] [2020-07-20 13:36:00,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:36:00,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:36:00,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:36:00,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:36:00,272 INFO L87 Difference]: Start difference. First operand 124 states and 204 transitions. Second operand 18 states. [2020-07-20 13:36:00,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:36:00,522 INFO L93 Difference]: Finished difference Result 153 states and 239 transitions. [2020-07-20 13:36:00,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:36:00,525 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 310 [2020-07-20 13:36:00,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:36:00,527 INFO L225 Difference]: With dead ends: 153 [2020-07-20 13:36:00,527 INFO L226 Difference]: Without dead ends: 133 [2020-07-20 13:36:00,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 590 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:36:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-20 13:36:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 121. [2020-07-20 13:36:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 13:36:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 197 transitions. [2020-07-20 13:36:00,559 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 197 transitions. Word has length 310 [2020-07-20 13:36:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:36:00,559 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 197 transitions. [2020-07-20 13:36:00,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:36:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 197 transitions. [2020-07-20 13:36:00,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-20 13:36:00,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:36:00,566 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:36:00,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:36:00,780 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:36:00,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:36:00,781 INFO L82 PathProgramCache]: Analyzing trace with hash 476971754, now seen corresponding path program 15 times [2020-07-20 13:36:00,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:36:00,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586967359] [2020-07-20 13:36:00,781 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:36:01,039 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:36:01,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:36:01,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:36:01,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:36:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 814 proven. 272 refuted. 0 times theorem prover too weak. 3894 trivial. 0 not checked. [2020-07-20 13:36:01,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:36:01,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:01,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:02,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:02,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:02,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:02,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:02,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 814 proven. 296 refuted. 0 times theorem prover too weak. 3870 trivial. 0 not checked. [2020-07-20 13:36:02,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586967359] [2020-07-20 13:36:02,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:36:02,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-20 13:36:02,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476727080] [2020-07-20 13:36:02,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 13:36:02,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:36:02,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 13:36:02,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-20 13:36:02,849 INFO L87 Difference]: Start difference. First operand 121 states and 197 transitions. Second operand 16 states. [2020-07-20 13:36:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:36:03,028 INFO L93 Difference]: Finished difference Result 196 states and 318 transitions. [2020-07-20 13:36:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:36:03,029 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 298 [2020-07-20 13:36:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:36:03,033 INFO L225 Difference]: With dead ends: 196 [2020-07-20 13:36:03,033 INFO L226 Difference]: Without dead ends: 189 [2020-07-20 13:36:03,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 570 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-20 13:36:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-07-20 13:36:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 129. [2020-07-20 13:36:03,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-20 13:36:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 211 transitions. [2020-07-20 13:36:03,056 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 211 transitions. Word has length 298 [2020-07-20 13:36:03,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:36:03,056 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 211 transitions. [2020-07-20 13:36:03,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 13:36:03,056 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 211 transitions. [2020-07-20 13:36:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-20 13:36:03,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:36:03,063 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:36:03,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:36:03,276 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:36:03,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:36:03,276 INFO L82 PathProgramCache]: Analyzing trace with hash -606289430, now seen corresponding path program 16 times [2020-07-20 13:36:03,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:36:03,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936045820] [2020-07-20 13:36:03,277 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:36:03,542 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:36:03,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:36:03,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 13:36:03,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:36:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 614 proven. 659 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-20 13:36:03,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:36:04,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:05,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:05,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:05,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:05,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:05,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:05,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 611 proven. 697 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-20 13:36:05,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936045820] [2020-07-20 13:36:05,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:36:05,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-20 13:36:05,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483752993] [2020-07-20 13:36:05,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:36:05,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:36:05,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:36:05,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:36:05,951 INFO L87 Difference]: Start difference. First operand 129 states and 211 transitions. Second operand 18 states. [2020-07-20 13:36:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:36:06,193 INFO L93 Difference]: Finished difference Result 168 states and 263 transitions. [2020-07-20 13:36:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:36:06,194 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-20 13:36:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:36:06,197 INFO L225 Difference]: With dead ends: 168 [2020-07-20 13:36:06,198 INFO L226 Difference]: Without dead ends: 156 [2020-07-20 13:36:06,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:36:06,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-20 13:36:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 121. [2020-07-20 13:36:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 13:36:06,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 195 transitions. [2020-07-20 13:36:06,218 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 195 transitions. Word has length 298 [2020-07-20 13:36:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:36:06,219 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 195 transitions. [2020-07-20 13:36:06,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:36:06,219 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 195 transitions. [2020-07-20 13:36:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-20 13:36:06,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:36:06,225 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:36:06,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:36:06,440 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:36:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:36:06,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1448945942, now seen corresponding path program 17 times [2020-07-20 13:36:06,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:36:06,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163003370] [2020-07-20 13:36:06,442 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:36:06,728 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:36:06,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:36:06,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 13:36:06,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:36:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 960 proven. 313 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-20 13:36:06,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:36:08,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:08,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:08,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:08,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:08,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:08,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:08,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:08,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 955 proven. 353 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-20 13:36:09,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163003370] [2020-07-20 13:36:09,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:36:09,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-20 13:36:09,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436350836] [2020-07-20 13:36:09,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:36:09,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:36:09,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:36:09,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:36:09,235 INFO L87 Difference]: Start difference. First operand 121 states and 195 transitions. Second operand 18 states. [2020-07-20 13:36:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:36:09,491 INFO L93 Difference]: Finished difference Result 181 states and 282 transitions. [2020-07-20 13:36:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:36:09,492 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-20 13:36:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:36:09,495 INFO L225 Difference]: With dead ends: 181 [2020-07-20 13:36:09,496 INFO L226 Difference]: Without dead ends: 164 [2020-07-20 13:36:09,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:36:09,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-20 13:36:09,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 81. [2020-07-20 13:36:09,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 13:36:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 125 transitions. [2020-07-20 13:36:09,513 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 125 transitions. Word has length 298 [2020-07-20 13:36:09,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:36:09,513 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 125 transitions. [2020-07-20 13:36:09,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:36:09,513 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 125 transitions. [2020-07-20 13:36:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-20 13:36:09,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:36:09,517 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 20, 20, 20, 20, 20, 20, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:36:09,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:36:09,731 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:36:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:36:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash -258866501, now seen corresponding path program 18 times [2020-07-20 13:36:09,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:36:09,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996053416] [2020-07-20 13:36:09,733 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:36:10,018 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:36:10,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:36:10,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:36:10,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:36:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 270 proven. 1056 refuted. 0 times theorem prover too weak. 3275 trivial. 0 not checked. [2020-07-20 13:36:10,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:36:11,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:12,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:12,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:12,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:12,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:12,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:12,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:12,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:12,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:12,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:12,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 280 proven. 1103 refuted. 0 times theorem prover too weak. 3218 trivial. 0 not checked. [2020-07-20 13:36:12,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996053416] [2020-07-20 13:36:12,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:36:12,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-20 13:36:12,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047682693] [2020-07-20 13:36:12,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:36:12,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:36:12,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:36:12,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:36:12,846 INFO L87 Difference]: Start difference. First operand 81 states and 125 transitions. Second operand 18 states. [2020-07-20 13:36:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:36:13,110 INFO L93 Difference]: Finished difference Result 180 states and 281 transitions. [2020-07-20 13:36:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:36:13,111 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 287 [2020-07-20 13:36:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:36:13,114 INFO L225 Difference]: With dead ends: 180 [2020-07-20 13:36:13,114 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 13:36:13,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 542 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-20 13:36:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 13:36:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-20 13:36:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 13:36:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-07-20 13:36:13,126 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 287 [2020-07-20 13:36:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:36:13,127 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-07-20 13:36:13,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:36:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-07-20 13:36:13,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-20 13:36:13,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:36:13,130 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:36:13,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:36:13,346 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:36:13,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:36:13,346 INFO L82 PathProgramCache]: Analyzing trace with hash -551621334, now seen corresponding path program 19 times [2020-07-20 13:36:13,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:36:13,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313115619] [2020-07-20 13:36:13,347 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:36:13,652 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:36:13,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:36:13,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 13:36:13,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:36:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 321 proven. 952 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-20 13:36:13,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:36:15,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:15,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:15,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:15,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:15,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:16,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:16,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:16,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:16,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:16,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 324 proven. 984 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-20 13:36:16,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313115619] [2020-07-20 13:36:16,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:36:16,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-20 13:36:16,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505371595] [2020-07-20 13:36:16,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:36:16,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:36:16,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:36:16,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:36:16,211 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 18 states. [2020-07-20 13:36:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:36:16,440 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2020-07-20 13:36:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:36:16,441 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-20 13:36:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:36:16,443 INFO L225 Difference]: With dead ends: 105 [2020-07-20 13:36:16,443 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 13:36:16,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:36:16,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 13:36:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-07-20 13:36:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-20 13:36:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-07-20 13:36:16,451 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 298 [2020-07-20 13:36:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:36:16,452 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-07-20 13:36:16,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:36:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-07-20 13:36:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-20 13:36:16,453 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:36:16,454 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:36:16,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:36:16,655 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:36:16,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:36:16,656 INFO L82 PathProgramCache]: Analyzing trace with hash -2133540566, now seen corresponding path program 20 times [2020-07-20 13:36:16,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:36:16,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326918934] [2020-07-20 13:36:16,657 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:36:16,976 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:36:16,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:36:16,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 13:36:16,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:36:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 328 proven. 1119 refuted. 0 times theorem prover too weak. 3533 trivial. 0 not checked. [2020-07-20 13:36:17,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:36:19,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:19,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:19,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:20,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:20,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:20,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:20,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:20,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:20,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:20,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:36:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 322 proven. 1176 refuted. 0 times theorem prover too weak. 3482 trivial. 0 not checked. [2020-07-20 13:36:20,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326918934] [2020-07-20 13:36:20,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:36:20,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 13:36:20,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096677809] [2020-07-20 13:36:20,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:36:20,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:36:20,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:36:20,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:36:20,591 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 20 states. [2020-07-20 13:36:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:36:20,945 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2020-07-20 13:36:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:36:20,946 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 298 [2020-07-20 13:36:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:36:20,948 INFO L225 Difference]: With dead ends: 138 [2020-07-20 13:36:20,948 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:36:20,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:36:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:36:20,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:36:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:36:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:36:20,955 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 298 [2020-07-20 13:36:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:36:20,955 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:36:20,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:36:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:36:20,955 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:36:21,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:36:21,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:36:23,755 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 374 DAG size of output: 189 [2020-07-20 13:36:23,959 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-20 13:36:24,361 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 114 [2020-07-20 13:36:25,093 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 133 [2020-07-20 13:36:26,711 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 393 DAG size of output: 192 [2020-07-20 13:36:28,052 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 374 DAG size of output: 189 [2020-07-20 13:36:28,233 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-20 13:36:29,779 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 393 DAG size of output: 192 [2020-07-20 13:36:30,112 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-20 13:36:31,444 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 381 DAG size of output: 190 [2020-07-20 13:36:31,794 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-20 13:36:31,936 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-20 13:36:32,286 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 114 [2020-07-20 13:36:33,808 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 388 DAG size of output: 192 [2020-07-20 13:36:35,072 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 369 DAG size of output: 189 [2020-07-20 13:36:36,660 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 393 DAG size of output: 192 [2020-07-20 13:36:36,851 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-20 13:36:37,839 WARN L193 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 165 [2020-07-20 13:36:39,144 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 374 DAG size of output: 189 [2020-07-20 13:36:40,474 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 369 DAG size of output: 189 [2020-07-20 13:36:41,969 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 393 DAG size of output: 192 [2020-07-20 13:36:42,670 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 149 [2020-07-20 13:36:43,953 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 376 DAG size of output: 190 [2020-07-20 13:36:44,322 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 114 [2020-07-20 13:36:45,717 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 388 DAG size of output: 192 [2020-07-20 13:36:46,872 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 362 DAG size of output: 178 [2020-07-20 13:36:47,701 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 167 [2020-07-20 13:36:48,974 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 374 DAG size of output: 189 [2020-07-20 13:36:50,506 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 393 DAG size of output: 192 [2020-07-20 13:36:51,544 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 350 DAG size of output: 175 [2020-07-20 13:36:51,883 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-20 13:36:53,119 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 369 DAG size of output: 179 [2020-07-20 13:36:54,566 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 393 DAG size of output: 192 [2020-07-20 13:36:55,760 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 362 DAG size of output: 178 [2020-07-20 13:36:55,905 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-20 13:36:57,390 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 388 DAG size of output: 192 [2020-07-20 13:36:57,532 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-20 13:36:57,874 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-20 13:36:58,165 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 104 [2020-07-20 13:36:59,561 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 374 DAG size of output: 189 [2020-07-20 13:37:00,801 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 373 DAG size of output: 193 [2020-07-20 13:37:02,132 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 380 DAG size of output: 194 [2020-07-20 13:37:03,616 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 399 DAG size of output: 149 [2020-07-20 13:37:05,127 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 388 DAG size of output: 192 [2020-07-20 13:37:05,262 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 71 [2020-07-20 13:37:05,601 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 113 [2020-07-20 13:37:06,897 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 374 DAG size of output: 189 [2020-07-20 13:37:07,283 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 164 [2020-07-20 13:37:07,431 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-20 13:37:08,754 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 381 DAG size of output: 181 [2020-07-20 13:37:09,060 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 104 [2020-07-20 13:37:10,569 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 393 DAG size of output: 192 [2020-07-20 13:37:10,903 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-20 13:37:12,342 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 393 DAG size of output: 192 [2020-07-20 13:37:12,481 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 71 [2020-07-20 13:37:13,772 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 381 DAG size of output: 181 [2020-07-20 13:37:15,041 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 374 DAG size of output: 189 [2020-07-20 13:37:15,268 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 73 [2020-07-20 13:37:15,609 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-20 13:37:17,076 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 393 DAG size of output: 192 [2020-07-20 13:37:17,219 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-20 13:37:17,547 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 116 [2020-07-20 13:37:18,861 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 374 DAG size of output: 189 [2020-07-20 13:37:20,321 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 392 DAG size of output: 196 [2020-07-20 13:37:20,664 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-20 13:37:22,187 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 393 DAG size of output: 192 [2020-07-20 13:37:23,500 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 374 DAG size of output: 189 [2020-07-20 13:37:25,133 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 393 DAG size of output: 192 [2020-07-20 13:37:25,274 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-20 13:37:25,658 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 129 [2020-07-20 13:37:26,224 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 142 [2020-07-20 13:37:27,548 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 374 DAG size of output: 189 [2020-07-20 13:37:27,888 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-20 13:37:29,391 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 393 DAG size of output: 192 [2020-07-20 13:37:29,950 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 142 [2020-07-20 13:37:30,299 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 114 [2020-07-20 13:37:31,678 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 381 DAG size of output: 190 [2020-07-20 13:37:33,173 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 393 DAG size of output: 192 [2020-07-20 13:37:34,479 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 369 DAG size of output: 189 [2020-07-20 13:37:34,618 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 60 [2020-07-20 13:37:34,761 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-20 13:37:36,270 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 393 DAG size of output: 192 [2020-07-20 13:37:43,501 WARN L193 SmtUtils]: Spent 6.96 s on a formula simplification. DAG size of input: 387 DAG size of output: 44 [2020-07-20 13:37:43,534 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:37:43,535 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:37:43,535 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:37:43,535 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 13:37:43,535 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:37:43,535 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:37:43,535 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-07-20 13:37:43,535 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-07-20 13:37:43,535 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-20 13:37:43,536 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-20 13:37:43,536 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 7 main_~x~0) (<= main_~x~0 7)) [2020-07-20 13:37:43,536 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-07-20 13:37:43,536 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-20 13:37:43,536 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-07-20 13:37:43,536 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-07-20 13:37:43,536 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-07-20 13:37:43,536 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-07-20 13:37:43,537 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 13:37:43,537 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-20 13:37:43,537 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse0 (<= 4 |fibo_#in~n|)) (.cse7 (<= |fibo_#in~n| 3)) (.cse8 (= |fibo_#t~ret0| 1))) (let ((.cse1 (and .cse8 (<= |fibo_#in~n| 2))) (.cse2 (and .cse8 (<= 3 |fibo_#in~n|) .cse7)) (.cse3 (and (= 5 |fibo_#t~ret0|) (<= 6 |fibo_#in~n|))) (.cse4 (and .cse0 (= |fibo_#t~ret0| 2) (<= |fibo_#in~n| 4))) (.cse5 (<= 7 |fibo_#in~n|))) (and (or .cse0 .cse1 .cse2) (<= fibo_~n |fibo_#in~n|) (or .cse3 .cse4 .cse1 .cse5 .cse2 (= |fibo_#t~ret0| 3)) (let ((.cse6 (<= |fibo_#in~n| fibo_~n))) (or (and .cse6 (= |fibo_#t~ret0| 8)) (and (<= |fibo_#in~n| 6) .cse6) (and .cse6 (<= 8 |fibo_#in~n|)))) (<= 2 |fibo_#in~n|) (or .cse3 .cse4 (and (<= 5 |fibo_#in~n|) (<= |fibo_#in~n| 5)) .cse5 .cse7)))) [2020-07-20 13:37:43,537 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-07-20 13:37:43,537 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-07-20 13:37:43,537 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-07-20 13:37:43,538 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-07-20 13:37:43,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:37:43 BoogieIcfgContainer [2020-07-20 13:37:43,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:37:43,549 INFO L168 Benchmark]: Toolchain (without parser) took 155883.54 ms. Allocated memory was 137.4 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 101.0 MB in the beginning and 2.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2020-07-20 13:37:43,550 INFO L168 Benchmark]: CDTParser took 0.71 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 13:37:43,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.58 ms. Allocated memory is still 137.4 MB. Free memory was 100.6 MB in the beginning and 91.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:37:43,551 INFO L168 Benchmark]: Boogie Preprocessor took 29.49 ms. Allocated memory is still 137.4 MB. Free memory was 91.5 MB in the beginning and 90.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 13:37:43,551 INFO L168 Benchmark]: RCFGBuilder took 358.56 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 89.9 MB in the beginning and 170.1 MB in the end (delta: -80.3 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:37:43,552 INFO L168 Benchmark]: TraceAbstraction took 155216.39 ms. Allocated memory was 202.4 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 169.5 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2020-07-20 13:37:43,554 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.71 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.58 ms. Allocated memory is still 137.4 MB. Free memory was 100.6 MB in the beginning and 91.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.49 ms. Allocated memory is still 137.4 MB. Free memory was 91.5 MB in the beginning and 90.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 358.56 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 89.9 MB in the beginning and 170.1 MB in the end (delta: -80.3 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 155216.39 ms. Allocated memory was 202.4 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 169.5 MB in the beginning and 2.0 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.3 GB. 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: 72.7s, OverallIterations: 28, TraceHistogramMax: 77, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 82.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 733 SDtfs, 918 SDslu, 3308 SDs, 0 SdLazy, 3939 SolverSat, 1368 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13018 GetRequests, 12210 SyntacticMatches, 295 SemanticMatches, 513 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=150occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 28 MinimizatonAttempts, 535 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 287 PreInvPairs, 14256 NumberOfFragments, 144 HoareAnnotationTreeSize, 287 FomulaSimplifications, 2133998245 FormulaSimplificationTreeSizeReduction, 75.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1566400 FormulaSimplificationTreeSizeReductionInter, 6.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 54.0s InterpolantComputationTime, 6462 NumberOfCodeBlocks, 5252 NumberOfCodeBlocksAsserted, 89 NumberOfCheckSat, 12843 ConstructedInterpolants, 0 QuantifiedInterpolants, 5852480 SizeOfPredicates, 163 NumberOfNonLiveVariables, 12418 ConjunctsInSsa, 501 ConjunctsInUnsatCore, 54 InterpolantComputations, 2 PerfectInterpolantSequences, 190990/228528 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...