/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:55:03,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:55:03,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:55:03,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:55:03,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:55:03,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:55:03,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:55:03,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:55:03,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:55:03,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:55:03,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:55:03,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:55:03,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:55:03,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:55:03,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:55:03,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:55:03,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:55:03,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:55:03,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:55:03,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:55:03,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:55:03,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:55:03,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:55:03,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:55:03,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:55:03,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:55:03,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:55:03,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:55:03,451 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 10:55:03,473 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:55:03,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:55:03,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:55:03,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:55:03,475 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:55:03,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:55:03,475 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:55:03,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:55:03,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:55:03,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:55:03,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:55:03,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:55:03,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:55:03,477 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:55:03,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:55:03,477 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:55:03,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:55:03,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:55:03,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:55:03,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:55:03,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:55:03,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:55:03,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:55:03,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:55:03,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:55:03,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:55:03,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:03,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:55:03,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:55:03,480 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 -> NOT_INCREMENTALLY [2020-07-21 10:55:03,790 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:55:03,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:55:03,812 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:55:03,814 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:55:03,814 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:55:03,815 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2020-07-21 10:55:03,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a2a6d978/535255f1c02e4c19ac18efb2009a6631/FLAG465f44e0b [2020-07-21 10:55:04,425 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:55:04,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2020-07-21 10:55:04,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a2a6d978/535255f1c02e4c19ac18efb2009a6631/FLAG465f44e0b [2020-07-21 10:55:04,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a2a6d978/535255f1c02e4c19ac18efb2009a6631 [2020-07-21 10:55:04,766 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:55:04,769 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:55:04,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:55:04,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:55:04,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:55:04,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:55:04" (1/1) ... [2020-07-21 10:55:04,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77350e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:04, skipping insertion in model container [2020-07-21 10:55:04,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:55:04" (1/1) ... [2020-07-21 10:55:04,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:55:04,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:55:04,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:55:04,987 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:55:05,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:55:05,021 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:55:05,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:05 WrapperNode [2020-07-21 10:55:05,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:55:05,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:55:05,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:55:05,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:55:05,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:05" (1/1) ... [2020-07-21 10:55:05,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:05" (1/1) ... [2020-07-21 10:55:05,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:05" (1/1) ... [2020-07-21 10:55:05,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:05" (1/1) ... [2020-07-21 10:55:05,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:05" (1/1) ... [2020-07-21 10:55:05,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:05" (1/1) ... [2020-07-21 10:55:05,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:05" (1/1) ... [2020-07-21 10:55:05,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:55:05,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:55:05,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:55:05,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:55:05,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:55:05,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:55:05,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:55:05,246 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 10:55:05,247 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 10:55:05,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:55:05,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:55:05,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:55:05,247 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 10:55:05,248 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 10:55:05,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:55:05,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:55:05,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:55:05,470 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:55:05,471 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:55:05,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:55:05 BoogieIcfgContainer [2020-07-21 10:55:05,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:55:05,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:55:05,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:55:05,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:55:05,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:55:04" (1/3) ... [2020-07-21 10:55:05,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cfe18e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:55:05, skipping insertion in model container [2020-07-21 10:55:05,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:05" (2/3) ... [2020-07-21 10:55:05,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cfe18e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:55:05, skipping insertion in model container [2020-07-21 10:55:05,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:55:05" (3/3) ... [2020-07-21 10:55:05,487 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_10-2.c [2020-07-21 10:55:05,500 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:55:05,513 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:55:05,534 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:55:05,569 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:55:05,570 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:55:05,570 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:55:05,570 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:55:05,570 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:55:05,571 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:55:05,571 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:55:05,571 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:55:05,614 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 10:55:05,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 10:55:05,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:05,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:05,629 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:05,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 10:55:05,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:05,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839588334] [2020-07-21 10:55:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:05,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:55:05,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:55:05,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:55:05,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839588334] [2020-07-21 10:55:05,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:55:05,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:55:05,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460265327] [2020-07-21 10:55:05,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:55:05,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:05,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:55:05,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:55:05,849 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 10:55:05,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:05,976 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 10:55:05,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:55:05,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 10:55:05,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:05,990 INFO L225 Difference]: With dead ends: 44 [2020-07-21 10:55:05,991 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 10:55:05,996 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 [2020-07-21 10:55:06,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 10:55:06,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 10:55:06,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:55:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 10:55:06,051 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 10:55:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:06,052 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 10:55:06,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:55:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 10:55:06,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 10:55:06,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:06,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:06,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:06,273 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:06,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:06,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 10:55:06,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:06,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035235101] [2020-07-21 10:55:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:06,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:55:06,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:55:06,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:55:06,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035235101] [2020-07-21 10:55:06,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:55:06,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:55:06,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109540699] [2020-07-21 10:55:06,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:55:06,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:06,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:55:06,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:55:06,347 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 10:55:06,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:06,417 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 10:55:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:55:06,418 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 10:55:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:06,420 INFO L225 Difference]: With dead ends: 36 [2020-07-21 10:55:06,421 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 10:55:06,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:55:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 10:55:06,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 10:55:06,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:55:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 10:55:06,432 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 10:55:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:06,433 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 10:55:06,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:55:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 10:55:06,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 10:55:06,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:06,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:06,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:06,651 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:06,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:06,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 10:55:06,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:06,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388766332] [2020-07-21 10:55:06,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:06,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:55:06,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:55:06,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:06,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:06,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:55:07,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388766332] [2020-07-21 10:55:07,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:07,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 10:55:07,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37186423] [2020-07-21 10:55:07,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:55:07,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:07,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:55:07,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:55:07,041 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 10:55:07,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:07,197 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 10:55:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:55:07,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 10:55:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:07,201 INFO L225 Difference]: With dead ends: 41 [2020-07-21 10:55:07,202 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 10:55:07,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:55:07,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 10:55:07,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 10:55:07,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 10:55:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 10:55:07,226 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 10:55:07,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:07,227 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 10:55:07,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:55:07,227 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 10:55:07,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 10:55:07,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:07,231 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:07,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:07,436 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 10:55:07,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:07,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487022775] [2020-07-21 10:55:07,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:07,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:55:07,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:55:07,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:07,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:07,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:55:07,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487022775] [2020-07-21 10:55:07,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:07,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 10:55:07,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191455884] [2020-07-21 10:55:07,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:55:07,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:07,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:55:07,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:55:07,765 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 10:55:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:07,914 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 10:55:07,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:55:07,915 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 10:55:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:07,917 INFO L225 Difference]: With dead ends: 46 [2020-07-21 10:55:07,917 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 10:55:07,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:55:07,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 10:55:07,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 10:55:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 10:55:07,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 10:55:07,928 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 10:55:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:07,929 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 10:55:07,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:55:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 10:55:07,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 10:55:07,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:07,931 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:08,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:08,138 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:08,139 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 10:55:08,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:08,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988209050] [2020-07-21 10:55:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:08,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:55:08,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 10:55:08,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:08,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:08,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:08,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:55:08,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988209050] [2020-07-21 10:55:08,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:08,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 10:55:08,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365880877] [2020-07-21 10:55:08,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:55:08,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:08,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:55:08,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:55:08,643 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 10:55:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:08,834 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 10:55:08,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:55:08,835 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 10:55:08,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:08,837 INFO L225 Difference]: With dead ends: 51 [2020-07-21 10:55:08,837 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 10:55:08,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:55:08,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 10:55:08,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 10:55:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 10:55:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 10:55:08,849 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 10:55:08,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:08,850 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 10:55:08,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:55:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 10:55:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 10:55:08,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:08,852 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:09,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:09,065 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:09,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:09,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 10:55:09,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:09,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439285786] [2020-07-21 10:55:09,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:09,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:55:09,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 10:55:09,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:09,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:09,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:09,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:55:09,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439285786] [2020-07-21 10:55:09,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:09,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 10:55:09,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739195785] [2020-07-21 10:55:09,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:55:09,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:09,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:55:09,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:55:09,495 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 10:55:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:09,672 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 10:55:09,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:55:09,678 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 10:55:09,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:09,680 INFO L225 Difference]: With dead ends: 56 [2020-07-21 10:55:09,684 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 10:55:09,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:55:09,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 10:55:09,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 10:55:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 10:55:09,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 10:55:09,707 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 10:55:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:09,708 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 10:55:09,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:55:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 10:55:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 10:55:09,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:09,718 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:09,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:09,934 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:09,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:09,935 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 10:55:09,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:09,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904110026] [2020-07-21 10:55:09,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:09,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:55:09,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 10:55:10,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:10,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:10,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:10,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:10,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:55:10,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904110026] [2020-07-21 10:55:10,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:10,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 10:55:10,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903564978] [2020-07-21 10:55:10,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:55:10,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:10,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:55:10,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:55:10,661 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 10:55:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:10,857 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 10:55:10,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:55:10,858 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 10:55:10,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:10,860 INFO L225 Difference]: With dead ends: 61 [2020-07-21 10:55:10,860 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 10:55:10,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:55:10,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 10:55:10,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 10:55:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 10:55:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 10:55:10,873 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 10:55:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:10,873 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 10:55:10,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:55:10,874 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 10:55:10,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 10:55:10,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:10,876 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:11,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:11,090 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:11,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:11,091 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 10:55:11,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:11,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133632211] [2020-07-21 10:55:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:11,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:55:11,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 10:55:11,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:11,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:11,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:11,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:11,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:11,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:55:11,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133632211] [2020-07-21 10:55:11,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:11,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 10:55:11,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017707045] [2020-07-21 10:55:11,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:55:11,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:11,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:55:11,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:55:11,761 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 10:55:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:11,973 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 10:55:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:55:11,974 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 10:55:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:11,977 INFO L225 Difference]: With dead ends: 66 [2020-07-21 10:55:11,977 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 10:55:11,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:55:11,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 10:55:11,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 10:55:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 10:55:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 10:55:11,990 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 10:55:11,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:11,990 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 10:55:11,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:55:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 10:55:11,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 10:55:11,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:11,993 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:12,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:12,195 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:12,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:12,196 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 10:55:12,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:12,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582583701] [2020-07-21 10:55:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:12,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:55:12,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 10:55:12,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:12,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:12,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:13,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:13,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:13,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:13,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:13,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 10:55:13,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582583701] [2020-07-21 10:55:13,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:13,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 10:55:13,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143236419] [2020-07-21 10:55:13,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 10:55:13,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:13,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 10:55:13,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:55:13,311 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 10:55:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:13,569 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 10:55:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:55:13,570 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 10:55:13,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:13,572 INFO L225 Difference]: With dead ends: 71 [2020-07-21 10:55:13,572 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 10:55:13,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:55:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 10:55:13,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 10:55:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 10:55:13,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 10:55:13,586 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 10:55:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:13,587 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 10:55:13,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 10:55:13,587 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 10:55:13,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 10:55:13,589 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:13,589 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:13,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:13,803 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:13,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 10:55:13,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:13,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127847997] [2020-07-21 10:55:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:13,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:55:13,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 10:55:13,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:14,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:14,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:14,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:14,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 10:55:14,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127847997] [2020-07-21 10:55:14,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:14,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 10:55:14,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399081585] [2020-07-21 10:55:14,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 10:55:14,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:14,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 10:55:14,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:55:14,913 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 10:55:15,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:15,163 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 10:55:15,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:55:15,163 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 10:55:15,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:15,166 INFO L225 Difference]: With dead ends: 76 [2020-07-21 10:55:15,166 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 10:55:15,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:55:15,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 10:55:15,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 10:55:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 10:55:15,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 10:55:15,180 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 10:55:15,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:15,181 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 10:55:15,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 10:55:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 10:55:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 10:55:15,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:15,184 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:15,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:15,398 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:15,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:15,399 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 10:55:15,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:15,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208152891] [2020-07-21 10:55:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:15,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:15,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:55:15,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 10:55:15,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:16,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:17,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:17,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:17,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:17,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:17,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:17,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:17,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 10:55:17,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208152891] [2020-07-21 10:55:17,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:17,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 10:55:17,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843102565] [2020-07-21 10:55:17,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 10:55:17,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:17,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 10:55:17,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:55:17,402 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 10:55:17,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:17,681 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 10:55:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:55:17,681 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 10:55:17,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:17,686 INFO L225 Difference]: With dead ends: 81 [2020-07-21 10:55:17,687 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 10:55:17,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:55:17,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 10:55:17,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 10:55:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 10:55:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 10:55:17,700 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 10:55:17,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:17,701 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 10:55:17,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 10:55:17,701 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 10:55:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:55:17,703 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:17,703 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:17,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:17,918 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:17,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 10:55:17,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:17,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638126880] [2020-07-21 10:55:17,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:18,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:55:18,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 10:55:18,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:18,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:19,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:19,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:19,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:19,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:19,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:19,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 10:55:19,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638126880] [2020-07-21 10:55:19,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:19,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 10:55:19,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665057210] [2020-07-21 10:55:19,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 10:55:19,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:19,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 10:55:19,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:55:19,605 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 10:55:19,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:19,895 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 10:55:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:55:19,902 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 10:55:19,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:19,904 INFO L225 Difference]: With dead ends: 86 [2020-07-21 10:55:19,906 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 10:55:19,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:55:19,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 10:55:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 10:55:19,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 10:55:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 10:55:19,930 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 10:55:19,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:19,931 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 10:55:19,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 10:55:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 10:55:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 10:55:19,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:19,935 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:20,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:20,144 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 10:55:20,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:20,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108909482] [2020-07-21 10:55:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:55:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:20,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:55:20,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 10:55:20,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:21,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:21,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:22,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:22,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:22,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:22,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:22,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:22,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:22,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:22,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:22,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 10:55:22,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108909482] [2020-07-21 10:55:22,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:22,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 10:55:22,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197444197] [2020-07-21 10:55:22,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:55:22,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:22,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:55:22,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:55:22,720 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 10:55:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:23,163 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 10:55:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:55:23,163 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 10:55:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:23,167 INFO L225 Difference]: With dead ends: 91 [2020-07-21 10:55:23,167 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 10:55:23,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:55:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 10:55:23,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 10:55:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 10:55:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 10:55:23,179 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 10:55:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:23,180 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 10:55:23,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:55:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 10:55:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 10:55:23,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:23,183 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:23,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:23,398 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:23,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:23,399 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 10:55:23,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:23,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737000824] [2020-07-21 10:55:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:55:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:23,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:55:23,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 10:55:23,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:25,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:25,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:25,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:25,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:26,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:26,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:26,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:26,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 10:55:26,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737000824] [2020-07-21 10:55:26,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:26,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 10:55:26,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198126820] [2020-07-21 10:55:26,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:55:26,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:26,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:55:26,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:55:26,285 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-21 10:55:26,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:26,662 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 10:55:26,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:55:26,663 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-21 10:55:26,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:26,668 INFO L225 Difference]: With dead ends: 96 [2020-07-21 10:55:26,668 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 10:55:26,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:55:26,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 10:55:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 10:55:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 10:55:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 10:55:26,683 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 10:55:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:26,683 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 10:55:26,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:55:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 10:55:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 10:55:26,691 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:26,691 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:26,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:26,905 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:26,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:26,906 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 10:55:26,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:26,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843372998] [2020-07-21 10:55:26,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:55:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:27,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:55:27,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 10:55:27,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:29,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:29,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:30,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:30,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:30,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:30,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:30,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:30,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:31,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:31,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:31,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 10:55:31,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843372998] [2020-07-21 10:55:31,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:31,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 10:55:31,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341142668] [2020-07-21 10:55:31,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:55:31,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:31,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:55:31,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:55:31,299 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-21 10:55:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:31,839 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 10:55:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:55:31,840 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-21 10:55:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:31,843 INFO L225 Difference]: With dead ends: 101 [2020-07-21 10:55:31,843 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 10:55:31,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:55:31,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 10:55:31,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 10:55:31,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 10:55:31,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 10:55:31,856 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 10:55:31,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:31,857 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 10:55:31,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:55:31,857 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 10:55:31,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 10:55:31,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:31,861 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 22, 21, 21, 14, 14, 14, 14, 14, 14, 14, 14, 12, 10, 10, 10, 10, 10, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:32,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:32,076 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:32,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-21 10:55:32,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:32,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684178328] [2020-07-21 10:55:32,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:55:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:32,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:55:32,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 762 refuted. 0 times theorem prover too weak. 2319 trivial. 0 not checked. [2020-07-21 10:55:32,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:34,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:34,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:35,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:36,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:36,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:36,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:36,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:36,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:36,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 795 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-21 10:55:36,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684178328] [2020-07-21 10:55:36,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:36,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 10:55:36,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029532870] [2020-07-21 10:55:36,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:55:36,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:36,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:55:36,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:55:36,849 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-21 10:55:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:37,368 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-21 10:55:37,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:55:37,370 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-21 10:55:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:37,373 INFO L225 Difference]: With dead ends: 106 [2020-07-21 10:55:37,373 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 10:55:37,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 638 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:55:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 10:55:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-21 10:55:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 10:55:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 10:55:37,386 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-21 10:55:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:37,387 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 10:55:37,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:55:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 10:55:37,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-21 10:55:37,396 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:37,397 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 52, 52, 47, 36, 36, 36, 36, 36, 36, 36, 36, 26, 26, 26, 26, 26, 26, 26, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:37,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:37,611 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:37,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-21 10:55:37,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:37,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298411745] [2020-07-21 10:55:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:55:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:38,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:55:38,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2371 refuted. 0 times theorem prover too weak. 17847 trivial. 0 not checked. [2020-07-21 10:55:38,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:42,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:43,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:44,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:44,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:44,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:44,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:45,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:45,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:45,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:45,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:45,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:45,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2411 refuted. 0 times theorem prover too weak. 17807 trivial. 0 not checked. [2020-07-21 10:55:45,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298411745] [2020-07-21 10:55:45,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:45,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 10:55:45,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482488691] [2020-07-21 10:55:45,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:55:45,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:45,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:55:45,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:55:45,906 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-21 10:55:46,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:46,464 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-21 10:55:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:55:46,465 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-21 10:55:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:46,469 INFO L225 Difference]: With dead ends: 111 [2020-07-21 10:55:46,469 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 10:55:46,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1599 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 10:55:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 10:55:46,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-21 10:55:46,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 10:55:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 10:55:46,483 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-21 10:55:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:46,485 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 10:55:46,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:55:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 10:55:46,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-21 10:55:46,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:46,489 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 27, 24, 24, 18, 18, 18, 18, 18, 18, 18, 18, 15, 12, 12, 12, 12, 12, 12, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:46,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:46,704 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:46,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:46,705 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-21 10:55:46,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:46,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276944196] [2020-07-21 10:55:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:55:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:47,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:55:47,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1118 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2020-07-21 10:55:47,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:49,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:50,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:50,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:51,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:52,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:52,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:52,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:52,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:52,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:52,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:52,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1162 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2020-07-21 10:55:52,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276944196] [2020-07-21 10:55:52,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:52,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 10:55:52,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100824451] [2020-07-21 10:55:52,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 10:55:52,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:52,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 10:55:52,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:55:52,852 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 23 states. [2020-07-21 10:55:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:53,415 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-21 10:55:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:55:53,416 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 418 [2020-07-21 10:55:53,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:53,420 INFO L225 Difference]: With dead ends: 116 [2020-07-21 10:55:53,420 INFO L226 Difference]: Without dead ends: 112 [2020-07-21 10:55:53,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 796 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 10:55:53,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-21 10:55:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-21 10:55:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 10:55:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 10:55:53,434 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-21 10:55:53,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:53,435 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 10:55:53,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 10:55:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 10:55:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2020-07-21 10:55:53,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:53,442 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 42, 41, 41, 31, 31, 31, 31, 31, 31, 31, 31, 20, 20, 20, 20, 20, 20, 20, 20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:53,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:53,656 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:53,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:53,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1777656900, now seen corresponding path program 8 times [2020-07-21 10:55:53,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:53,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132524943] [2020-07-21 10:55:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:55:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:54,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1510 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:55:54,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14119 backedges. 349 proven. 2104 refuted. 0 times theorem prover too weak. 11666 trivial. 0 not checked. [2020-07-21 10:55:54,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:58,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:58,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:59,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:59,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:00,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:01,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:01,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:02,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:02,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:02,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:02,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:02,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:02,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:02,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:02,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14119 backedges. 349 proven. 2156 refuted. 0 times theorem prover too weak. 11614 trivial. 0 not checked. [2020-07-21 10:56:02,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132524943] [2020-07-21 10:56:02,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:56:02,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 10:56:02,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52233949] [2020-07-21 10:56:02,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 10:56:02,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:56:02,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 10:56:02,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 10:56:02,905 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 25 states. [2020-07-21 10:56:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:56:03,552 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-21 10:56:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 10:56:03,553 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 676 [2020-07-21 10:56:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:56:03,557 INFO L225 Difference]: With dead ends: 121 [2020-07-21 10:56:03,557 INFO L226 Difference]: Without dead ends: 117 [2020-07-21 10:56:03,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1363 GetRequests, 1309 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 10:56:03,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-21 10:56:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-21 10:56:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 10:56:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 10:56:03,571 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 676 [2020-07-21 10:56:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:56:03,571 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 10:56:03,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 10:56:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 10:56:03,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2020-07-21 10:56:03,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:56:03,579 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 49, 47, 47, 32, 32, 32, 32, 32, 32, 32, 32, 26, 23, 23, 23, 23, 23, 23, 23, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:56:03,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:03,792 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:56:03,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:56:03,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1813836186, now seen corresponding path program 4 times [2020-07-21 10:56:03,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:56:03,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292636118] [2020-07-21 10:56:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:56:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:56:04,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1678 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:56:04,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:56:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17056 backedges. 414 proven. 2048 refuted. 0 times theorem prover too weak. 14594 trivial. 0 not checked. [2020-07-21 10:56:04,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:56:08,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:08,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:09,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:10,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:10,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:10,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:11,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:11,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:11,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:11,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:11,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:11,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 17056 backedges. 414 proven. 2088 refuted. 0 times theorem prover too weak. 14554 trivial. 0 not checked. [2020-07-21 10:56:11,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292636118] [2020-07-21 10:56:11,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:56:11,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 10:56:11,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657099911] [2020-07-21 10:56:11,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 10:56:11,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:56:11,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 10:56:11,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:56:11,912 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 23 states. [2020-07-21 10:56:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:56:12,573 INFO L93 Difference]: Finished difference Result 159 states and 539 transitions. [2020-07-21 10:56:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:56:12,574 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 754 [2020-07-21 10:56:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:56:12,579 INFO L225 Difference]: With dead ends: 159 [2020-07-21 10:56:12,579 INFO L226 Difference]: Without dead ends: 155 [2020-07-21 10:56:12,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1517 GetRequests, 1468 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 10:56:12,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-21 10:56:12,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 77. [2020-07-21 10:56:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 10:56:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2020-07-21 10:56:12,599 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 754 [2020-07-21 10:56:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:56:12,600 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2020-07-21 10:56:12,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 10:56:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2020-07-21 10:56:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2020-07-21 10:56:12,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:56:12,608 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 47, 45, 45, 45, 33, 33, 33, 33, 33, 33, 33, 25, 22, 22, 22, 22, 22, 22, 22, 19, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:56:12,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:12,823 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:56:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:56:12,823 INFO L82 PathProgramCache]: Analyzing trace with hash 848822556, now seen corresponding path program 1 times [2020-07-21 10:56:12,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:56:12,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600091105] [2020-07-21 10:56:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:56:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:56:13,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1700 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:56:13,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:56:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 17647 backedges. 424 proven. 1891 refuted. 0 times theorem prover too weak. 15332 trivial. 0 not checked. [2020-07-21 10:56:13,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:56:16,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:16,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:17,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:18,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:18,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17647 backedges. 424 proven. 1924 refuted. 0 times theorem prover too weak. 15299 trivial. 0 not checked. [2020-07-21 10:56:19,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600091105] [2020-07-21 10:56:19,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:56:19,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 10:56:19,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880073711] [2020-07-21 10:56:19,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:56:19,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:56:19,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:56:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:56:19,859 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand 21 states. [2020-07-21 10:56:20,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:56:20,381 INFO L93 Difference]: Finished difference Result 179 states and 673 transitions. [2020-07-21 10:56:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:56:20,382 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 765 [2020-07-21 10:56:20,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:56:20,386 INFO L225 Difference]: With dead ends: 179 [2020-07-21 10:56:20,387 INFO L226 Difference]: Without dead ends: 175 [2020-07-21 10:56:20,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1538 GetRequests, 1494 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:56:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-21 10:56:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 79. [2020-07-21 10:56:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 10:56:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2020-07-21 10:56:20,411 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 765 [2020-07-21 10:56:20,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:56:20,412 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2020-07-21 10:56:20,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:56:20,412 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2020-07-21 10:56:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1120 [2020-07-21 10:56:20,424 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:56:20,425 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 79, 79, 63, 59, 43, 43, 43, 43, 43, 43, 43, 39, 39, 39, 39, 39, 39, 39, 27, 20, 20, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:56:20,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:20,638 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:56:20,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:56:20,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1169640139, now seen corresponding path program 1 times [2020-07-21 10:56:20,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:56:20,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513345003] [2020-07-21 10:56:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:56:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:56:21,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 2489 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:56:21,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:56:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 37184 backedges. 623 proven. 3179 refuted. 0 times theorem prover too weak. 33382 trivial. 0 not checked. [2020-07-21 10:56:22,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:56:26,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:28,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:28,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:29,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:29,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:30,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:30,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:30,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:30,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:31,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:31,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:31,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:31,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:31,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:31,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:31,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 37184 backedges. 623 proven. 3219 refuted. 0 times theorem prover too weak. 33342 trivial. 0 not checked. [2020-07-21 10:56:31,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513345003] [2020-07-21 10:56:31,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:56:31,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 10:56:31,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026159379] [2020-07-21 10:56:31,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 10:56:31,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:56:31,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 10:56:31,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:56:31,880 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand 23 states. [2020-07-21 10:56:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:56:32,521 INFO L93 Difference]: Finished difference Result 156 states and 522 transitions. [2020-07-21 10:56:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:56:32,525 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1119 [2020-07-21 10:56:32,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:56:32,531 INFO L225 Difference]: With dead ends: 156 [2020-07-21 10:56:32,531 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 10:56:32,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2246 GetRequests, 2197 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 10:56:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 10:56:32,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 82. [2020-07-21 10:56:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 10:56:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2020-07-21 10:56:32,550 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 1119 [2020-07-21 10:56:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:56:32,551 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2020-07-21 10:56:32,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 10:56:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2020-07-21 10:56:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1578 [2020-07-21 10:56:32,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:56:32,574 INFO L422 BasicCegarLoop]: trace histogram [125, 125, 106, 106, 100, 84, 62, 62, 62, 62, 62, 62, 62, 53, 53, 53, 53, 53, 53, 53, 47, 25, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:56:32,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:32,790 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:56:32,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:56:32,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1664301228, now seen corresponding path program 2 times [2020-07-21 10:56:32,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:56:32,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619314965] [2020-07-21 10:56:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:56:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:56:33,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 3504 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:56:33,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:56:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 74772 backedges. 925 proven. 5240 refuted. 0 times theorem prover too weak. 68607 trivial. 0 not checked. [2020-07-21 10:56:35,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:56:42,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:42,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:44,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:44,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:46,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:46,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:47,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:47,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:48,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:48,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:48,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:48,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:48,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:48,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:48,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:48,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:48,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 74772 backedges. 929 proven. 5288 refuted. 0 times theorem prover too weak. 68555 trivial. 0 not checked. [2020-07-21 10:56:49,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619314965] [2020-07-21 10:56:49,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:56:49,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 10:56:49,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516409037] [2020-07-21 10:56:49,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 10:56:49,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:56:49,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 10:56:49,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 10:56:49,995 INFO L87 Difference]: Start difference. First operand 82 states and 170 transitions. Second operand 25 states. [2020-07-21 10:56:51,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:56:51,081 INFO L93 Difference]: Finished difference Result 237 states and 1097 transitions. [2020-07-21 10:56:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 10:56:51,082 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1577 [2020-07-21 10:56:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:56:51,088 INFO L225 Difference]: With dead ends: 237 [2020-07-21 10:56:51,089 INFO L226 Difference]: Without dead ends: 125 [2020-07-21 10:56:51,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3163 GetRequests, 3109 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 10:56:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-21 10:56:51,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-07-21 10:56:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-21 10:56:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 252 transitions. [2020-07-21 10:56:51,116 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 252 transitions. Word has length 1577 [2020-07-21 10:56:51,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:56:51,117 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 252 transitions. [2020-07-21 10:56:51,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 10:56:51,118 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 252 transitions. [2020-07-21 10:56:51,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1131 [2020-07-21 10:56:51,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:56:51,134 INFO L422 BasicCegarLoop]: trace histogram [96, 96, 71, 71, 64, 57, 48, 48, 48, 48, 48, 48, 48, 35, 35, 35, 35, 35, 35, 35, 32, 29, 14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:56:51,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:51,350 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:56:51,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:56:51,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1455592940, now seen corresponding path program 3 times [2020-07-21 10:56:51,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:56:51,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128672800] [2020-07-21 10:56:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:56:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:56:52,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 2514 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:56:52,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:56:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 38684 backedges. 731 proven. 3625 refuted. 0 times theorem prover too weak. 34328 trivial. 0 not checked. [2020-07-21 10:56:52,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:56:58,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:58,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:01,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:02,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:02,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:03,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:03,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:04,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:04,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:04,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:04,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:04,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:04,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:04,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:04,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:04,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:04,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:04,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 38684 backedges. 743 proven. 3667 refuted. 0 times theorem prover too weak. 34274 trivial. 0 not checked. [2020-07-21 10:57:05,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128672800] [2020-07-21 10:57:05,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:05,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-21 10:57:05,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136457752] [2020-07-21 10:57:05,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 10:57:05,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:05,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 10:57:05,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:57:05,463 INFO L87 Difference]: Start difference. First operand 125 states and 252 transitions. Second operand 26 states. [2020-07-21 10:57:06,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:06,647 INFO L93 Difference]: Finished difference Result 397 states and 2010 transitions. [2020-07-21 10:57:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 10:57:06,652 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 1130 [2020-07-21 10:57:06,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:06,676 INFO L225 Difference]: With dead ends: 397 [2020-07-21 10:57:06,676 INFO L226 Difference]: Without dead ends: 251 [2020-07-21 10:57:06,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2269 GetRequests, 2215 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 10:57:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-07-21 10:57:06,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 166. [2020-07-21 10:57:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-21 10:57:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 446 transitions. [2020-07-21 10:57:06,748 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 446 transitions. Word has length 1130 [2020-07-21 10:57:06,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:06,749 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 446 transitions. [2020-07-21 10:57:06,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 10:57:06,750 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 446 transitions. [2020-07-21 10:57:06,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1095 [2020-07-21 10:57:06,769 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:06,769 INFO L422 BasicCegarLoop]: trace histogram [94, 94, 69, 65, 65, 64, 47, 47, 47, 47, 47, 47, 47, 37, 32, 32, 32, 32, 32, 32, 32, 25, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:06,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:06,983 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:06,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:06,987 INFO L82 PathProgramCache]: Analyzing trace with hash 428768890, now seen corresponding path program 4 times [2020-07-21 10:57:06,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:06,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405212646] [2020-07-21 10:57:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:57:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:07,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 2430 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:57:07,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 36474 backedges. 693 proven. 3218 refuted. 0 times theorem prover too weak. 32563 trivial. 0 not checked. [2020-07-21 10:57:08,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:13,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:13,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:15,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:17,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:17,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:18,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:18,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:19,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:19,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:19,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:19,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:19,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:19,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 36474 backedges. 705 proven. 3246 refuted. 0 times theorem prover too weak. 32523 trivial. 0 not checked. [2020-07-21 10:57:20,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405212646] [2020-07-21 10:57:20,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:20,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 10:57:20,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881769869] [2020-07-21 10:57:20,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 10:57:20,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:20,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 10:57:20,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:57:20,103 INFO L87 Difference]: Start difference. First operand 166 states and 446 transitions. Second operand 23 states. [2020-07-21 10:57:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:21,284 INFO L93 Difference]: Finished difference Result 456 states and 2882 transitions. [2020-07-21 10:57:21,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:57:21,287 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1094 [2020-07-21 10:57:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:21,302 INFO L225 Difference]: With dead ends: 456 [2020-07-21 10:57:21,303 INFO L226 Difference]: Without dead ends: 276 [2020-07-21 10:57:21,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2196 GetRequests, 2147 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 10:57:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-07-21 10:57:21,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 170. [2020-07-21 10:57:21,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-21 10:57:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 449 transitions. [2020-07-21 10:57:21,365 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 449 transitions. Word has length 1094 [2020-07-21 10:57:21,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:21,366 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 449 transitions. [2020-07-21 10:57:21,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 10:57:21,366 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 449 transitions. [2020-07-21 10:57:21,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1240 [2020-07-21 10:57:21,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:21,389 INFO L422 BasicCegarLoop]: trace histogram [102, 102, 79, 79, 74, 72, 51, 51, 51, 51, 51, 51, 51, 39, 39, 39, 39, 39, 39, 39, 35, 28, 21, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:21,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:21,603 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:21,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1852868113, now seen corresponding path program 5 times [2020-07-21 10:57:21,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:21,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072009577] [2020-07-21 10:57:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:57:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:22,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 2753 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:57:22,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 46249 backedges. 817 proven. 4000 refuted. 0 times theorem prover too weak. 41432 trivial. 0 not checked. [2020-07-21 10:57:23,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:29,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:29,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:32,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:35,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:37,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:38,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:38,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:38,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:38,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:38,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:39,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:39,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:39,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:39,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 46249 backedges. 823 proven. 4046 refuted. 0 times theorem prover too weak. 41380 trivial. 0 not checked. [2020-07-21 10:57:40,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072009577] [2020-07-21 10:57:40,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:40,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 10:57:40,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375976200] [2020-07-21 10:57:40,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 10:57:40,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:40,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 10:57:40,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 10:57:40,178 INFO L87 Difference]: Start difference. First operand 170 states and 449 transitions. Second operand 25 states. [2020-07-21 10:57:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:41,885 INFO L93 Difference]: Finished difference Result 420 states and 2408 transitions. [2020-07-21 10:57:41,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 10:57:41,888 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1239 [2020-07-21 10:57:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:41,897 INFO L225 Difference]: With dead ends: 420 [2020-07-21 10:57:41,898 INFO L226 Difference]: Without dead ends: 251 [2020-07-21 10:57:41,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2487 GetRequests, 2433 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 10:57:41,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-07-21 10:57:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 143. [2020-07-21 10:57:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-07-21 10:57:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 325 transitions. [2020-07-21 10:57:41,946 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 325 transitions. Word has length 1239 [2020-07-21 10:57:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:41,947 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 325 transitions. [2020-07-21 10:57:41,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 10:57:41,947 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 325 transitions. [2020-07-21 10:57:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1171 [2020-07-21 10:57:41,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:41,971 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 81, 81, 71, 66, 45, 45, 45, 45, 45, 45, 45, 40, 40, 40, 40, 40, 40, 40, 26, 26, 24, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:42,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:42,185 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:42,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:42,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1735314664, now seen corresponding path program 6 times [2020-07-21 10:57:42,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:42,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533604886] [2020-07-21 10:57:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:57:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:43,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:57:43,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 40690 backedges. 566 proven. 3057 refuted. 0 times theorem prover too weak. 37067 trivial. 0 not checked. [2020-07-21 10:57:44,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:52,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:52,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:53,891 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 10:57:54,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:54,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:55,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:56,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:57,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:57,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:57,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:57,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 40690 backedges. 566 proven. 3090 refuted. 0 times theorem prover too weak. 37034 trivial. 0 not checked. [2020-07-21 10:57:58,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533604886] [2020-07-21 10:57:58,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:58,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 10:57:58,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774964474] [2020-07-21 10:57:58,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:57:58,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:58,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:57:58,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:57:58,168 INFO L87 Difference]: Start difference. First operand 143 states and 325 transitions. Second operand 21 states. [2020-07-21 10:57:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:58,937 INFO L93 Difference]: Finished difference Result 292 states and 1157 transitions. [2020-07-21 10:57:58,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:57:58,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1170 [2020-07-21 10:57:58,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:58,950 INFO L225 Difference]: With dead ends: 292 [2020-07-21 10:57:58,950 INFO L226 Difference]: Without dead ends: 278 [2020-07-21 10:57:58,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2347 GetRequests, 2303 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:57:58,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-07-21 10:57:59,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 153. [2020-07-21 10:57:59,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-21 10:57:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 367 transitions. [2020-07-21 10:57:59,030 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 367 transitions. Word has length 1170 [2020-07-21 10:57:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:59,031 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 367 transitions. [2020-07-21 10:57:59,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:57:59,031 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 367 transitions. [2020-07-21 10:57:59,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1034 [2020-07-21 10:57:59,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:59,052 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 74, 74, 54, 54, 39, 39, 39, 39, 39, 39, 39, 37, 37, 37, 37, 37, 37, 37, 25, 20, 17, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:59,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:59,268 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:59,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:59,269 INFO L82 PathProgramCache]: Analyzing trace with hash -671260129, now seen corresponding path program 7 times [2020-07-21 10:57:59,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:59,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199155397] [2020-07-21 10:57:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:58:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:00,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 2299 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:58:00,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 31618 backedges. 630 proven. 2876 refuted. 0 times theorem prover too weak. 28112 trivial. 0 not checked. [2020-07-21 10:58:01,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:07,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:12,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:12,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 31618 backedges. 632 proven. 2914 refuted. 0 times theorem prover too weak. 28072 trivial. 0 not checked. [2020-07-21 10:58:15,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199155397] [2020-07-21 10:58:15,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:15,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 10:58:15,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442286861] [2020-07-21 10:58:15,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 10:58:15,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:15,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 10:58:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:58:15,350 INFO L87 Difference]: Start difference. First operand 153 states and 367 transitions. Second operand 23 states. [2020-07-21 10:58:16,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:16,305 INFO L93 Difference]: Finished difference Result 269 states and 976 transitions. [2020-07-21 10:58:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:58:16,307 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1033 [2020-07-21 10:58:16,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:16,315 INFO L225 Difference]: With dead ends: 269 [2020-07-21 10:58:16,315 INFO L226 Difference]: Without dead ends: 255 [2020-07-21 10:58:16,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2074 GetRequests, 2025 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 10:58:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-21 10:58:16,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 156. [2020-07-21 10:58:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-21 10:58:16,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-07-21 10:58:16,353 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 1033 [2020-07-21 10:58:16,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:16,354 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-07-21 10:58:16,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 10:58:16,354 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-07-21 10:58:16,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 974 [2020-07-21 10:58:16,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:16,368 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 70, 70, 58, 50, 36, 36, 36, 36, 36, 36, 36, 35, 35, 35, 35, 35, 35, 35, 23, 20, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:16,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:16,582 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:16,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:16,583 INFO L82 PathProgramCache]: Analyzing trace with hash 995284232, now seen corresponding path program 8 times [2020-07-21 10:58:16,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:16,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845825765] [2020-07-21 10:58:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:17,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:58:17,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 27950 backedges. 588 proven. 2332 refuted. 0 times theorem prover too weak. 25030 trivial. 0 not checked. [2020-07-21 10:58:18,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:24,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:28,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:29,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:29,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:29,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 27950 backedges. 588 proven. 2362 refuted. 0 times theorem prover too weak. 25000 trivial. 0 not checked. [2020-07-21 10:58:30,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845825765] [2020-07-21 10:58:30,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:30,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 10:58:30,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452752540] [2020-07-21 10:58:30,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:58:30,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:30,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:58:30,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:58:30,895 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 21 states. [2020-07-21 10:58:31,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:31,641 INFO L93 Difference]: Finished difference Result 305 states and 1236 transitions. [2020-07-21 10:58:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:58:31,643 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 973 [2020-07-21 10:58:31,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:31,650 INFO L225 Difference]: With dead ends: 305 [2020-07-21 10:58:31,651 INFO L226 Difference]: Without dead ends: 291 [2020-07-21 10:58:31,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1953 GetRequests, 1909 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:58:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-07-21 10:58:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 156. [2020-07-21 10:58:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-21 10:58:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-07-21 10:58:31,691 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 973 [2020-07-21 10:58:31,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:31,692 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-07-21 10:58:31,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:58:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-07-21 10:58:31,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1050 [2020-07-21 10:58:31,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:31,707 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 70, 70, 65, 59, 41, 41, 41, 41, 41, 41, 41, 35, 35, 35, 35, 35, 35, 35, 30, 18, 18, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:31,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:31,922 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:31,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:31,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1694199609, now seen corresponding path program 9 times [2020-07-21 10:58:31,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:31,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664494690] [2020-07-21 10:58:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:32,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 2331 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:58:32,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 32723 backedges. 830 proven. 3169 refuted. 0 times theorem prover too weak. 28724 trivial. 0 not checked. [2020-07-21 10:58:33,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:40,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:44,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:45,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:45,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:47,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:47,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:47,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:47,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:48,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:48,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:48,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:48,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:48,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 32723 backedges. 834 proven. 3217 refuted. 0 times theorem prover too weak. 28672 trivial. 0 not checked. [2020-07-21 10:58:49,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664494690] [2020-07-21 10:58:49,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:49,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 10:58:49,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884259927] [2020-07-21 10:58:49,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 10:58:49,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:49,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 10:58:49,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 10:58:49,255 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 25 states. [2020-07-21 10:58:50,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:50,220 INFO L93 Difference]: Finished difference Result 263 states and 870 transitions. [2020-07-21 10:58:50,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 10:58:50,222 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1049 [2020-07-21 10:58:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:50,227 INFO L225 Difference]: With dead ends: 263 [2020-07-21 10:58:50,227 INFO L226 Difference]: Without dead ends: 205 [2020-07-21 10:58:50,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2107 GetRequests, 2053 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 10:58:50,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-21 10:58:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 164. [2020-07-21 10:58:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-07-21 10:58:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-07-21 10:58:50,254 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 1049 [2020-07-21 10:58:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:50,255 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-07-21 10:58:50,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 10:58:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-07-21 10:58:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1171 [2020-07-21 10:58:50,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:50,271 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 82, 82, 71, 66, 44, 44, 44, 44, 44, 44, 44, 41, 41, 41, 41, 41, 41, 41, 30, 22, 18, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:50,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:50,486 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash -458207036, now seen corresponding path program 10 times [2020-07-21 10:58:50,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:50,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535288905] [2020-07-21 10:58:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:51,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:58:51,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 40642 backedges. 638 proven. 2969 refuted. 0 times theorem prover too weak. 37035 trivial. 0 not checked. [2020-07-21 10:58:52,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:01,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:03,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:03,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:05,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:06,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:07,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:07,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:07,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:07,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:07,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 40642 backedges. 640 proven. 3000 refuted. 0 times theorem prover too weak. 37002 trivial. 0 not checked. [2020-07-21 10:59:08,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535288905] [2020-07-21 10:59:08,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:08,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 10:59:08,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620528348] [2020-07-21 10:59:08,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:59:08,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:08,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:59:08,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:59:08,530 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 21 states. [2020-07-21 10:59:09,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:09,360 INFO L93 Difference]: Finished difference Result 265 states and 884 transitions. [2020-07-21 10:59:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:59:09,363 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1170 [2020-07-21 10:59:09,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:09,369 INFO L225 Difference]: With dead ends: 265 [2020-07-21 10:59:09,369 INFO L226 Difference]: Without dead ends: 251 [2020-07-21 10:59:09,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2347 GetRequests, 2303 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:59:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-07-21 10:59:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 184. [2020-07-21 10:59:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-21 10:59:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 508 transitions. [2020-07-21 10:59:09,404 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 508 transitions. Word has length 1170 [2020-07-21 10:59:09,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:09,405 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 508 transitions. [2020-07-21 10:59:09,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:59:09,405 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 508 transitions. [2020-07-21 10:59:09,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-07-21 10:59:09,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:09,419 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 60, 60, 55, 48, 36, 36, 36, 36, 36, 36, 36, 30, 30, 30, 30, 30, 30, 30, 25, 18, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:09,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:09,634 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:09,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:09,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1066766135, now seen corresponding path program 11 times [2020-07-21 10:59:09,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:09,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650742578] [2020-07-21 10:59:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:10,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:59:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 24465 backedges. 619 proven. 2449 refuted. 0 times theorem prover too weak. 21397 trivial. 0 not checked. [2020-07-21 10:59:11,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:13,938 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 10:59:18,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:22,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:24,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:24,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:25,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:25,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:25,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:26,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:26,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:26,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:26,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:26,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:26,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:26,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 24465 backedges. 621 proven. 2487 refuted. 0 times theorem prover too weak. 21357 trivial. 0 not checked. [2020-07-21 10:59:27,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650742578] [2020-07-21 10:59:27,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:27,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 10:59:27,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297417718] [2020-07-21 10:59:27,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 10:59:27,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:27,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 10:59:27,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:59:27,399 INFO L87 Difference]: Start difference. First operand 184 states and 508 transitions. Second operand 23 states. [2020-07-21 10:59:28,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:28,257 INFO L93 Difference]: Finished difference Result 273 states and 945 transitions. [2020-07-21 10:59:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:59:28,259 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 908 [2020-07-21 10:59:28,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:28,265 INFO L225 Difference]: With dead ends: 273 [2020-07-21 10:59:28,265 INFO L226 Difference]: Without dead ends: 259 [2020-07-21 10:59:28,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1824 GetRequests, 1775 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 10:59:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-07-21 10:59:28,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 185. [2020-07-21 10:59:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-07-21 10:59:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 512 transitions. [2020-07-21 10:59:28,305 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 512 transitions. Word has length 908 [2020-07-21 10:59:28,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:28,306 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 512 transitions. [2020-07-21 10:59:28,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 10:59:28,306 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 512 transitions. [2020-07-21 10:59:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2020-07-21 10:59:28,322 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:28,323 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 72, 72, 64, 58, 39, 39, 39, 39, 39, 39, 39, 36, 36, 36, 36, 36, 36, 36, 28, 19, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:28,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:28,537 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:28,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:28,538 INFO L82 PathProgramCache]: Analyzing trace with hash 220581254, now seen corresponding path program 12 times [2020-07-21 10:59:28,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:28,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809500521] [2020-07-21 10:59:28,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:29,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 2300 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:59:29,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 31701 backedges. 617 proven. 2497 refuted. 0 times theorem prover too weak. 28587 trivial. 0 not checked. [2020-07-21 10:59:30,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:38,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:42,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:44,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:44,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:45,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:45,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:45,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:45,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:45,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 31701 backedges. 617 proven. 2529 refuted. 0 times theorem prover too weak. 28555 trivial. 0 not checked. [2020-07-21 10:59:46,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809500521] [2020-07-21 10:59:46,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:46,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 10:59:46,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997129390] [2020-07-21 10:59:46,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:59:46,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:46,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:59:46,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:59:46,755 INFO L87 Difference]: Start difference. First operand 185 states and 512 transitions. Second operand 21 states. [2020-07-21 10:59:47,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:47,721 INFO L93 Difference]: Finished difference Result 301 states and 1121 transitions. [2020-07-21 10:59:47,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:59:47,724 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1035 [2020-07-21 10:59:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:47,733 INFO L225 Difference]: With dead ends: 301 [2020-07-21 10:59:47,733 INFO L226 Difference]: Without dead ends: 287 [2020-07-21 10:59:47,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2077 GetRequests, 2033 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:59:47,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-07-21 10:59:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 179. [2020-07-21 10:59:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-07-21 10:59:47,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 481 transitions. [2020-07-21 10:59:47,769 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 481 transitions. Word has length 1035 [2020-07-21 10:59:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:47,770 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 481 transitions. [2020-07-21 10:59:47,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:59:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 481 transitions. [2020-07-21 10:59:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1525 [2020-07-21 10:59:47,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:47,793 INFO L422 BasicCegarLoop]: trace histogram [114, 114, 109, 109, 90, 89, 57, 57, 57, 57, 57, 57, 57, 54, 54, 54, 54, 54, 54, 54, 36, 32, 24, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:48,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:48,007 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:48,008 INFO L82 PathProgramCache]: Analyzing trace with hash -601786946, now seen corresponding path program 13 times [2020-07-21 10:59:48,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:48,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703438142] [2020-07-21 10:59:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:49,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 3386 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:59:49,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 69337 backedges. 714 proven. 3442 refuted. 0 times theorem prover too weak. 65181 trivial. 0 not checked. [2020-07-21 10:59:50,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:00,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:00,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:03,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:04,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:05,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:05,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:05,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:05,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:05,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:05,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:05,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 69337 backedges. 714 proven. 3466 refuted. 0 times theorem prover too weak. 65157 trivial. 0 not checked. [2020-07-21 11:00:06,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703438142] [2020-07-21 11:00:06,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:06,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:00:06,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720322519] [2020-07-21 11:00:06,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:00:06,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:06,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:00:06,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:00:06,944 INFO L87 Difference]: Start difference. First operand 179 states and 481 transitions. Second operand 19 states. [2020-07-21 11:00:07,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:07,466 INFO L93 Difference]: Finished difference Result 287 states and 1017 transitions. [2020-07-21 11:00:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:00:07,469 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1524 [2020-07-21 11:00:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:07,476 INFO L225 Difference]: With dead ends: 287 [2020-07-21 11:00:07,476 INFO L226 Difference]: Without dead ends: 273 [2020-07-21 11:00:07,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3054 GetRequests, 3015 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:00:07,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-07-21 11:00:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 181. [2020-07-21 11:00:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-07-21 11:00:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 496 transitions. [2020-07-21 11:00:07,510 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 496 transitions. Word has length 1524 [2020-07-21 11:00:07,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:07,511 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 496 transitions. [2020-07-21 11:00:07,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:00:07,511 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 496 transitions. [2020-07-21 11:00:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1713 [2020-07-21 11:00:07,537 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:07,538 INFO L422 BasicCegarLoop]: trace histogram [129, 129, 122, 122, 100, 99, 64, 64, 64, 64, 64, 64, 64, 61, 61, 61, 61, 61, 61, 61, 38, 36, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:07,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:07,752 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:07,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1141803998, now seen corresponding path program 14 times [2020-07-21 11:00:07,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:07,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454871414] [2020-07-21 11:00:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:09,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 3804 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 11:00:09,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 87733 backedges. 1186 proven. 5546 refuted. 0 times theorem prover too weak. 81001 trivial. 0 not checked. [2020-07-21 11:00:10,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:15,070 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 11:00:15,182 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 11:00:15,289 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 11:00:15,558 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 11:00:29,022 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:00:29,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:29,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:36,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:36,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:38,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:38,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:40,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:40,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:41,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:41,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:41,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:42,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:42,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:42,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:42,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:43,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 87733 backedges. 1188 proven. 5596 refuted. 0 times theorem prover too weak. 80949 trivial. 0 not checked. [2020-07-21 11:00:45,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454871414] [2020-07-21 11:00:45,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:45,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 11:00:45,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102940983] [2020-07-21 11:00:45,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 11:00:45,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:45,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 11:00:45,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:00:45,383 INFO L87 Difference]: Start difference. First operand 181 states and 496 transitions. Second operand 25 states. [2020-07-21 11:00:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:46,748 INFO L93 Difference]: Finished difference Result 281 states and 965 transitions. [2020-07-21 11:00:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 11:00:46,751 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1712 [2020-07-21 11:00:46,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:46,757 INFO L225 Difference]: With dead ends: 281 [2020-07-21 11:00:46,757 INFO L226 Difference]: Without dead ends: 235 [2020-07-21 11:00:46,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3433 GetRequests, 3379 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 11:00:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-07-21 11:00:46,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 200. [2020-07-21 11:00:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-21 11:00:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 537 transitions. [2020-07-21 11:00:46,784 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 537 transitions. Word has length 1712 [2020-07-21 11:00:46,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:46,785 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 537 transitions. [2020-07-21 11:00:46,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 11:00:46,785 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 537 transitions. [2020-07-21 11:00:46,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1042 [2020-07-21 11:00:46,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:46,796 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 75, 75, 61, 55, 39, 39, 39, 39, 39, 39, 39, 37, 37, 37, 37, 37, 37, 37, 23, 22, 18, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:46,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:46,997 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash -896918795, now seen corresponding path program 15 times [2020-07-21 11:00:46,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:46,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963926976] [2020-07-21 11:00:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:48,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 2315 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 11:00:48,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 32055 backedges. 696 proven. 2447 refuted. 0 times theorem prover too weak. 28912 trivial. 0 not checked. [2020-07-21 11:00:48,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:58,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:58,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:01,663 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 11:01:03,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:06,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:06,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:07,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:07,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:07,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:08,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:08,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:08,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:08,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 32055 backedges. 698 proven. 2475 refuted. 0 times theorem prover too weak. 28882 trivial. 0 not checked. [2020-07-21 11:01:09,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963926976] [2020-07-21 11:01:09,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:09,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 11:01:09,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480356062] [2020-07-21 11:01:09,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:01:09,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:09,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:01:09,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:01:09,816 INFO L87 Difference]: Start difference. First operand 200 states and 537 transitions. Second operand 21 states. [2020-07-21 11:01:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:10,859 INFO L93 Difference]: Finished difference Result 291 states and 970 transitions. [2020-07-21 11:01:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:01:10,863 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1041 [2020-07-21 11:01:10,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:10,869 INFO L225 Difference]: With dead ends: 291 [2020-07-21 11:01:10,869 INFO L226 Difference]: Without dead ends: 277 [2020-07-21 11:01:10,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2089 GetRequests, 2045 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 11:01:10,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-07-21 11:01:10,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-07-21 11:01:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 11:01:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 522 transitions. [2020-07-21 11:01:10,904 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 522 transitions. Word has length 1041 [2020-07-21 11:01:10,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:10,905 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 522 transitions. [2020-07-21 11:01:10,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:01:10,906 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 522 transitions. [2020-07-21 11:01:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2020-07-21 11:01:10,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:10,917 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 50, 47, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 21, 18, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:11,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:11,133 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:11,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1457621515, now seen corresponding path program 16 times [2020-07-21 11:01:11,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:11,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974654758] [2020-07-21 11:01:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:12,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 11:01:12,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 19010 backedges. 669 proven. 1758 refuted. 0 times theorem prover too weak. 16583 trivial. 0 not checked. [2020-07-21 11:01:12,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:20,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:20,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:24,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:24,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:25,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:25,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:26,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:26,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:27,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:27,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:27,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:27,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:27,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 19010 backedges. 671 proven. 1789 refuted. 0 times theorem prover too weak. 16550 trivial. 0 not checked. [2020-07-21 11:01:28,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974654758] [2020-07-21 11:01:28,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:28,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 11:01:28,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117013418] [2020-07-21 11:01:28,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:01:28,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:28,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:01:28,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:01:28,508 INFO L87 Difference]: Start difference. First operand 198 states and 522 transitions. Second operand 21 states. [2020-07-21 11:01:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:29,244 INFO L93 Difference]: Finished difference Result 302 states and 1053 transitions. [2020-07-21 11:01:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:01:29,246 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 806 [2020-07-21 11:01:29,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:29,253 INFO L225 Difference]: With dead ends: 302 [2020-07-21 11:01:29,253 INFO L226 Difference]: Without dead ends: 285 [2020-07-21 11:01:29,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1619 GetRequests, 1575 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 11:01:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-21 11:01:29,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 221. [2020-07-21 11:01:29,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 11:01:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 653 transitions. [2020-07-21 11:01:29,303 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 653 transitions. Word has length 806 [2020-07-21 11:01:29,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:29,303 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 653 transitions. [2020-07-21 11:01:29,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:01:29,304 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 653 transitions. [2020-07-21 11:01:29,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1163 [2020-07-21 11:01:29,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:29,321 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 68, 61, 43, 43, 43, 43, 43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 26, 24, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:29,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:29,537 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:29,538 INFO L82 PathProgramCache]: Analyzing trace with hash -938685950, now seen corresponding path program 17 times [2020-07-21 11:01:29,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:29,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757954565] [2020-07-21 11:01:29,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:30,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 2584 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 11:01:30,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 40064 backedges. 891 proven. 3077 refuted. 0 times theorem prover too weak. 36096 trivial. 0 not checked. [2020-07-21 11:01:31,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:40,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:40,740 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 11:01:44,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:47,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:48,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:49,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:49,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:50,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:50,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:50,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:50,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:50,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:50,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:51,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 40064 backedges. 895 proven. 3113 refuted. 0 times theorem prover too weak. 36056 trivial. 0 not checked. [2020-07-21 11:01:52,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757954565] [2020-07-21 11:01:52,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:52,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 11:01:52,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702578512] [2020-07-21 11:01:52,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 11:01:52,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:52,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 11:01:52,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:01:52,912 INFO L87 Difference]: Start difference. First operand 221 states and 653 transitions. Second operand 23 states. [2020-07-21 11:01:54,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:54,276 INFO L93 Difference]: Finished difference Result 306 states and 1079 transitions. [2020-07-21 11:01:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 11:01:54,281 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1162 [2020-07-21 11:01:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:54,287 INFO L225 Difference]: With dead ends: 306 [2020-07-21 11:01:54,288 INFO L226 Difference]: Without dead ends: 289 [2020-07-21 11:01:54,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2332 GetRequests, 2283 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 11:01:54,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-07-21 11:01:54,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 228. [2020-07-21 11:01:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-07-21 11:01:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 655 transitions. [2020-07-21 11:01:54,331 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 655 transitions. Word has length 1162 [2020-07-21 11:01:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:54,332 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 655 transitions. [2020-07-21 11:01:54,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 11:01:54,333 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 655 transitions. [2020-07-21 11:01:54,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1127 [2020-07-21 11:01:54,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:54,352 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 79, 79, 65, 64, 43, 43, 43, 43, 43, 43, 43, 39, 39, 39, 39, 39, 39, 39, 26, 21, 21, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:54,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:54,566 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:54,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:54,567 INFO L82 PathProgramCache]: Analyzing trace with hash -526975429, now seen corresponding path program 18 times [2020-07-21 11:01:54,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:54,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118505347] [2020-07-21 11:01:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:55,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 2503 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 11:01:55,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:56,506 INFO L134 CoverageAnalysis]: Checked inductivity of 37616 backedges. 791 proven. 2626 refuted. 0 times theorem prover too weak. 34199 trivial. 0 not checked. [2020-07-21 11:01:56,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:02:00,604 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:02:09,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:09,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:13,780 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 11:02:16,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:16,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:19,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:19,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:20,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:20,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:20,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:20,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:21,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:21,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:21,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:21,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:21,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:21,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 37616 backedges. 793 proven. 2654 refuted. 0 times theorem prover too weak. 34169 trivial. 0 not checked. [2020-07-21 11:02:23,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118505347] [2020-07-21 11:02:23,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:02:23,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 11:02:23,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121671710] [2020-07-21 11:02:23,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:02:23,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:02:23,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:02:23,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:02:23,542 INFO L87 Difference]: Start difference. First operand 228 states and 655 transitions. Second operand 21 states. [2020-07-21 11:02:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:02:24,822 INFO L93 Difference]: Finished difference Result 371 states and 1442 transitions. [2020-07-21 11:02:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:02:24,827 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1126 [2020-07-21 11:02:24,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:02:24,836 INFO L225 Difference]: With dead ends: 371 [2020-07-21 11:02:24,837 INFO L226 Difference]: Without dead ends: 354 [2020-07-21 11:02:24,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2259 GetRequests, 2215 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 11:02:24,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-07-21 11:02:24,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 218. [2020-07-21 11:02:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-21 11:02:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 590 transitions. [2020-07-21 11:02:24,877 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 590 transitions. Word has length 1126 [2020-07-21 11:02:24,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:02:24,878 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 590 transitions. [2020-07-21 11:02:24,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:02:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 590 transitions. [2020-07-21 11:02:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1428 [2020-07-21 11:02:24,896 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:02:24,897 INFO L422 BasicCegarLoop]: trace histogram [105, 105, 104, 104, 86, 80, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 34, 28, 24, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:02:25,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:25,097 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:02:25,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:02:25,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1523055687, now seen corresponding path program 19 times [2020-07-21 11:02:25,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:02:25,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640978189] [2020-07-21 11:02:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:02:26,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 3171 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 11:02:26,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:02:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 60687 backedges. 871 proven. 4146 refuted. 0 times theorem prover too weak. 55670 trivial. 0 not checked. [2020-07-21 11:02:27,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:02:28,593 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 11:02:32,068 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 11:02:32,170 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 11:02:32,280 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 11:02:32,392 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 11:02:32,507 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 11:02:32,618 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:02:48,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:54,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:54,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:57,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:58,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:58,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:59,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:00,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:00,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:00,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:00,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:00,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:00,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:01,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:01,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 60687 backedges. 879 proven. 4178 refuted. 0 times theorem prover too weak. 55630 trivial. 0 not checked. [2020-07-21 11:03:02,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640978189] [2020-07-21 11:03:02,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:03:02,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 11:03:02,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42271076] [2020-07-21 11:03:02,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 11:03:02,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:03:02,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 11:03:02,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:03:02,787 INFO L87 Difference]: Start difference. First operand 218 states and 590 transitions. Second operand 23 states. [2020-07-21 11:03:04,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:03:04,406 INFO L93 Difference]: Finished difference Result 354 states and 1218 transitions. [2020-07-21 11:03:04,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 11:03:04,411 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1427 [2020-07-21 11:03:04,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:03:04,419 INFO L225 Difference]: With dead ends: 354 [2020-07-21 11:03:04,419 INFO L226 Difference]: Without dead ends: 284 [2020-07-21 11:03:04,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2862 GetRequests, 2813 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 11:03:04,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-07-21 11:03:04,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 241. [2020-07-21 11:03:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-07-21 11:03:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 671 transitions. [2020-07-21 11:03:04,465 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 671 transitions. Word has length 1427 [2020-07-21 11:03:04,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:03:04,465 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 671 transitions. [2020-07-21 11:03:04,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 11:03:04,466 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 671 transitions. [2020-07-21 11:03:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2020-07-21 11:03:04,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:03:04,484 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 66, 66, 60, 55, 37, 37, 37, 37, 37, 37, 37, 33, 33, 33, 33, 33, 33, 33, 27, 18, 15, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:03:04,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:04,700 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:03:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:03:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash -652967195, now seen corresponding path program 20 times [2020-07-21 11:03:04,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:03:04,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755531807] [2020-07-21 11:03:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:03:05,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:03:05,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:03:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 27711 backedges. 677 proven. 1924 refuted. 0 times theorem prover too weak. 25110 trivial. 0 not checked. [2020-07-21 11:03:07,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:03:19,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:19,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:22,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:24,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:24,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:25,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:25,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:25,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:25,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:25,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:26,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 27711 backedges. 677 proven. 1950 refuted. 0 times theorem prover too weak. 25084 trivial. 0 not checked. [2020-07-21 11:03:28,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755531807] [2020-07-21 11:03:28,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:03:28,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:03:28,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526052159] [2020-07-21 11:03:28,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:03:28,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:03:28,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:03:28,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:03:28,244 INFO L87 Difference]: Start difference. First operand 241 states and 671 transitions. Second operand 19 states. [2020-07-21 11:03:29,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:03:29,442 INFO L93 Difference]: Finished difference Result 468 states and 2176 transitions. [2020-07-21 11:03:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:03:29,447 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 968 [2020-07-21 11:03:29,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:03:29,461 INFO L225 Difference]: With dead ends: 468 [2020-07-21 11:03:29,461 INFO L226 Difference]: Without dead ends: 451 [2020-07-21 11:03:29,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1942 GetRequests, 1903 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:03:29,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-07-21 11:03:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 243. [2020-07-21 11:03:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-07-21 11:03:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 685 transitions. [2020-07-21 11:03:29,523 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 685 transitions. Word has length 968 [2020-07-21 11:03:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:03:29,524 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 685 transitions. [2020-07-21 11:03:29,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:03:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 685 transitions. [2020-07-21 11:03:29,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1177 [2020-07-21 11:03:29,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:03:29,537 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 71, 60, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 28, 26, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:03:29,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:29,738 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:03:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:03:29,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1400804343, now seen corresponding path program 21 times [2020-07-21 11:03:29,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:03:29,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391830884] [2020-07-21 11:03:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:03:31,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 2615 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 11:03:31,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:03:31,785 INFO L134 CoverageAnalysis]: Checked inductivity of 41063 backedges. 837 proven. 2735 refuted. 0 times theorem prover too weak. 37491 trivial. 0 not checked. [2020-07-21 11:03:31,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:03:35,854 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:03:35,960 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:03:36,065 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 11:03:46,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:46,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:51,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:54,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:54,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:55,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:56,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:56,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:56,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:56,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:56,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:57,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 41063 backedges. 837 proven. 2767 refuted. 0 times theorem prover too weak. 37459 trivial. 0 not checked. [2020-07-21 11:03:59,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391830884] [2020-07-21 11:03:59,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:03:59,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 11:03:59,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828713807] [2020-07-21 11:03:59,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:03:59,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:03:59,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:03:59,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:03:59,102 INFO L87 Difference]: Start difference. First operand 243 states and 685 transitions. Second operand 21 states. [2020-07-21 11:04:00,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:04:00,559 INFO L93 Difference]: Finished difference Result 360 states and 1285 transitions. [2020-07-21 11:04:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:04:00,563 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1176 [2020-07-21 11:04:00,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:04:00,570 INFO L225 Difference]: With dead ends: 360 [2020-07-21 11:04:00,570 INFO L226 Difference]: Without dead ends: 343 [2020-07-21 11:04:00,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2359 GetRequests, 2315 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 11:04:00,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-07-21 11:04:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 229. [2020-07-21 11:04:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-07-21 11:04:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 626 transitions. [2020-07-21 11:04:00,600 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 626 transitions. Word has length 1176 [2020-07-21 11:04:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:04:00,601 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 626 transitions. [2020-07-21 11:04:00,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:04:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 626 transitions. [2020-07-21 11:04:00,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2020-07-21 11:04:00,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:04:00,616 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 79, 79, 66, 60, 41, 41, 41, 41, 41, 41, 41, 39, 39, 39, 39, 39, 39, 39, 27, 19, 19, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:04:00,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:00,817 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:04:00,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:04:00,818 INFO L82 PathProgramCache]: Analyzing trace with hash -255705731, now seen corresponding path program 22 times [2020-07-21 11:04:00,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:04:00,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517636116] [2020-07-21 11:04:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:04:02,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 2443 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 11:04:02,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:04:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 35767 backedges. 876 proven. 2448 refuted. 0 times theorem prover too weak. 32443 trivial. 0 not checked. [2020-07-21 11:04:02,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:04:11,304 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 11:04:12,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:17,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:19,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:20,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:20,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:20,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:20,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:20,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:20,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:21,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:21,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 35767 backedges. 880 proven. 2474 refuted. 0 times theorem prover too weak. 32413 trivial. 0 not checked. [2020-07-21 11:04:22,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517636116] [2020-07-21 11:04:22,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:04:22,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 11:04:22,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010790448] [2020-07-21 11:04:22,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:04:22,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:04:22,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:04:22,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:04:22,951 INFO L87 Difference]: Start difference. First operand 229 states and 626 transitions. Second operand 21 states. [2020-07-21 11:04:24,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:04:24,139 INFO L93 Difference]: Finished difference Result 310 states and 959 transitions. [2020-07-21 11:04:24,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:04:24,144 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1099 [2020-07-21 11:04:24,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:04:24,150 INFO L225 Difference]: With dead ends: 310 [2020-07-21 11:04:24,151 INFO L226 Difference]: Without dead ends: 290 [2020-07-21 11:04:24,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2205 GetRequests, 2161 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 11:04:24,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-07-21 11:04:24,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 226. [2020-07-21 11:04:24,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-07-21 11:04:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 590 transitions. [2020-07-21 11:04:24,179 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 590 transitions. Word has length 1099 [2020-07-21 11:04:24,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:04:24,180 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 590 transitions. [2020-07-21 11:04:24,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:04:24,180 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 590 transitions. [2020-07-21 11:04:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1187 [2020-07-21 11:04:24,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:04:24,196 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 84, 84, 71, 70, 44, 44, 44, 44, 44, 44, 44, 42, 42, 42, 42, 42, 42, 42, 28, 27, 19, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:04:24,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:24,397 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:04:24,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:04:24,398 INFO L82 PathProgramCache]: Analyzing trace with hash -395254139, now seen corresponding path program 23 times [2020-07-21 11:04:24,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:04:24,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718683859] [2020-07-21 11:04:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:04:25,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 2635 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 11:04:25,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:04:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 41736 backedges. 1061 proven. 3072 refuted. 0 times theorem prover too weak. 37603 trivial. 0 not checked. [2020-07-21 11:04:26,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:04:30,564 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 11:04:30,667 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 11:04:30,779 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 11:04:30,889 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 11:04:30,995 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 11:04:38,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:39,049 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 11:04:45,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:48,856 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 11:04:49,070 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 11:04:49,183 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 11:04:49,291 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:04:49,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:51,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:51,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:52,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:52,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:53,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:53,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:53,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:54,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:54,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 41736 backedges. 1067 proven. 3106 refuted. 0 times theorem prover too weak. 37563 trivial. 0 not checked. [2020-07-21 11:04:57,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718683859] [2020-07-21 11:04:57,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:04:57,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 11:04:57,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407346025] [2020-07-21 11:04:57,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 11:04:57,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:04:57,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 11:04:57,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:04:57,479 INFO L87 Difference]: Start difference. First operand 226 states and 590 transitions. Second operand 23 states. [2020-07-21 11:04:59,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:04:59,797 INFO L93 Difference]: Finished difference Result 315 states and 919 transitions. [2020-07-21 11:04:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 11:04:59,804 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1186 [2020-07-21 11:04:59,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:04:59,810 INFO L225 Difference]: With dead ends: 315 [2020-07-21 11:04:59,810 INFO L226 Difference]: Without dead ends: 269 [2020-07-21 11:04:59,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2380 GetRequests, 2331 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 11:04:59,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-07-21 11:04:59,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 242. [2020-07-21 11:04:59,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-07-21 11:04:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 666 transitions. [2020-07-21 11:04:59,855 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 666 transitions. Word has length 1186 [2020-07-21 11:04:59,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:04:59,856 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 666 transitions. [2020-07-21 11:04:59,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 11:04:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 666 transitions. [2020-07-21 11:04:59,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1005 [2020-07-21 11:04:59,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:04:59,871 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 72, 72, 59, 56, 37, 37, 37, 37, 37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 22, 20, 19, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:05:00,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:00,083 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:05:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:05:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1040058954, now seen corresponding path program 24 times [2020-07-21 11:05:00,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:05:00,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001975441] [2020-07-21 11:05:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:05:01,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 11:05:01,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:05:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 29759 backedges. 980 proven. 2471 refuted. 0 times theorem prover too weak. 26308 trivial. 0 not checked. [2020-07-21 11:05:02,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:05:04,801 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 11:05:04,907 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 11:05:05,016 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 11:05:05,129 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 11:05:05,250 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 11:05:05,371 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 11:05:06,352 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 11:05:06,463 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 11:05:06,590 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:05:06,708 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:05:07,513 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:05:07,663 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:05:07,834 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:05:07,982 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:05:08,991 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 11:05:09,126 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 11:05:09,264 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 11:05:09,402 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 11:05:09,529 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:05:09,663 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 11:05:09,771 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:05:09,876 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 11:05:09,980 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:05:17,244 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 11:05:17,348 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 11:05:18,215 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 11:05:18,326 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 11:05:18,445 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:05:18,563 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:05:19,239 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:05:19,363 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:05:19,493 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:05:19,622 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:05:19,741 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 11:05:19,847 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:05:20,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:20,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:24,813 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 11:05:24,920 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 11:05:25,038 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:05:25,156 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:05:25,267 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 11:05:25,371 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 11:05:25,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:27,236 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 11:05:31,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:31,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:33,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:33,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:34,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:35,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:35,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:35,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:36,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:36,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:37,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 29759 backedges. 984 proven. 2509 refuted. 0 times theorem prover too weak. 26266 trivial. 0 not checked. [2020-07-21 11:05:39,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001975441] [2020-07-21 11:05:39,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:05:39,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 11:05:39,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001656681] [2020-07-21 11:05:39,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 11:05:39,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:05:39,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 11:05:39,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:05:39,369 INFO L87 Difference]: Start difference. First operand 242 states and 666 transitions. Second operand 23 states. [2020-07-21 11:05:41,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:05:41,709 INFO L93 Difference]: Finished difference Result 379 states and 1329 transitions. [2020-07-21 11:05:41,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 11:05:41,716 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1004 [2020-07-21 11:05:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:05:41,724 INFO L225 Difference]: With dead ends: 379 [2020-07-21 11:05:41,724 INFO L226 Difference]: Without dead ends: 336 [2020-07-21 11:05:41,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2016 GetRequests, 1967 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 11:05:41,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-07-21 11:05:41,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 238. [2020-07-21 11:05:41,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-21 11:05:41,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 663 transitions. [2020-07-21 11:05:41,775 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 663 transitions. Word has length 1004 [2020-07-21 11:05:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:05:41,775 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 663 transitions. [2020-07-21 11:05:41,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 11:05:41,776 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 663 transitions. [2020-07-21 11:05:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1089 [2020-07-21 11:05:41,788 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:05:41,789 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 77, 77, 64, 63, 41, 41, 41, 41, 41, 41, 41, 38, 38, 38, 38, 38, 38, 38, 26, 22, 18, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:05:41,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:41,990 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:05:41,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:05:41,991 INFO L82 PathProgramCache]: Analyzing trace with hash 378834582, now seen corresponding path program 25 times [2020-07-21 11:05:41,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:05:41,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943554475] [2020-07-21 11:05:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:05:43,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 2418 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 11:05:43,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:05:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 35049 backedges. 1091 proven. 2260 refuted. 0 times theorem prover too weak. 31698 trivial. 0 not checked. [2020-07-21 11:05:44,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:05:47,284 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:05:47,392 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:05:48,749 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:05:48,870 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:05:48,997 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 11:05:49,119 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 11:05:50,316 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 11:05:50,449 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 11:05:50,588 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:05:50,726 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:05:50,861 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 11:05:50,985 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:05:51,102 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 11:05:51,206 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:05:59,566 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:05:59,682 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:06:01,106 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:06:01,224 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:06:01,354 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 11:06:01,480 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 11:06:01,602 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:06:01,717 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 11:06:01,820 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:06:02,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:11,454 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:06:11,574 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:06:11,678 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:06:11,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:11,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:14,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:14,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:16,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:17,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:17,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:17,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:17,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:18,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:18,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:19,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 35049 backedges. 1095 proven. 2289 refuted. 0 times theorem prover too weak. 31665 trivial. 0 not checked. [2020-07-21 11:06:24,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943554475] [2020-07-21 11:06:24,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:06:24,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 11:06:24,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504304717] [2020-07-21 11:06:24,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:06:24,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:06:24,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:06:24,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:06:24,020 INFO L87 Difference]: Start difference. First operand 238 states and 663 transitions. Second operand 21 states. [2020-07-21 11:06:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:06:25,931 INFO L93 Difference]: Finished difference Result 366 states and 1364 transitions. [2020-07-21 11:06:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:06:25,940 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1088 [2020-07-21 11:06:25,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:06:25,950 INFO L225 Difference]: With dead ends: 366 [2020-07-21 11:06:25,951 INFO L226 Difference]: Without dead ends: 357 [2020-07-21 11:06:25,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2183 GetRequests, 2139 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 11:06:25,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-07-21 11:06:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 287. [2020-07-21 11:06:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-07-21 11:06:26,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 946 transitions. [2020-07-21 11:06:26,000 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 946 transitions. Word has length 1088 [2020-07-21 11:06:26,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:06:26,001 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 946 transitions. [2020-07-21 11:06:26,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:06:26,001 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 946 transitions. [2020-07-21 11:06:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1168 [2020-07-21 11:06:26,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:06:26,017 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 82, 82, 64, 58, 45, 45, 45, 45, 45, 45, 45, 41, 41, 41, 41, 41, 41, 41, 33, 19, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:06:26,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:06:26,218 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:06:26,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:06:26,219 INFO L82 PathProgramCache]: Analyzing trace with hash 691860363, now seen corresponding path program 26 times [2020-07-21 11:06:26,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:06:26,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597983923] [2020-07-21 11:06:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:06:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:06:27,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 2597 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:06:27,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:06:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 40573 backedges. 855 proven. 2242 refuted. 0 times theorem prover too weak. 37476 trivial. 0 not checked. [2020-07-21 11:06:28,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:06:32,804 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 11:06:32,919 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 11:06:33,038 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:06:33,157 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:06:35,108 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:06:35,237 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:06:35,373 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:06:35,509 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:06:35,640 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 11:06:35,761 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 11:06:35,873 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:06:35,976 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 11:06:49,636 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 11:06:49,744 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 11:06:50,926 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 11:06:51,041 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 11:06:51,169 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:06:51,295 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:06:51,413 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:06:51,517 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:06:51,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:51,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:59,578 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 11:06:59,792 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 11:06:59,901 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 11:07:00,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:00,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:04,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:04,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:05,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:05,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:06,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:06,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:06,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:06,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:07,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:07,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:08,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 40573 backedges. 855 proven. 2265 refuted. 0 times theorem prover too weak. 37453 trivial. 0 not checked. [2020-07-21 11:07:12,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597983923] [2020-07-21 11:07:12,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:07:12,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:07:12,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897512765] [2020-07-21 11:07:12,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:07:12,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:07:12,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:07:12,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:07:12,157 INFO L87 Difference]: Start difference. First operand 287 states and 946 transitions. Second operand 19 states. [2020-07-21 11:07:13,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:07:13,862 INFO L93 Difference]: Finished difference Result 384 states and 1398 transitions. [2020-07-21 11:07:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:07:13,871 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1167 [2020-07-21 11:07:13,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:07:13,880 INFO L225 Difference]: With dead ends: 384 [2020-07-21 11:07:13,881 INFO L226 Difference]: Without dead ends: 366 [2020-07-21 11:07:13,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2340 GetRequests, 2301 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:07:13,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-07-21 11:07:13,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 278. [2020-07-21 11:07:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-07-21 11:07:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 889 transitions. [2020-07-21 11:07:13,925 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 889 transitions. Word has length 1167 [2020-07-21 11:07:13,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:07:13,926 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 889 transitions. [2020-07-21 11:07:13,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:07:13,926 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 889 transitions. [2020-07-21 11:07:13,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1152 [2020-07-21 11:07:13,944 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:07:13,945 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 82, 82, 68, 62, 43, 43, 43, 43, 43, 43, 43, 41, 41, 41, 41, 41, 41, 41, 25, 25, 21, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:07:14,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:07:14,160 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:07:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:07:14,161 INFO L82 PathProgramCache]: Analyzing trace with hash -778131017, now seen corresponding path program 27 times [2020-07-21 11:07:14,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:07:14,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321919391] [2020-07-21 11:07:14,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:07:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:07:15,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 2559 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 11:07:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:07:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 39309 backedges. 1478 proven. 2943 refuted. 0 times theorem prover too weak. 34888 trivial. 0 not checked. [2020-07-21 11:07:17,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:07:19,966 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 11:07:20,077 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 11:07:20,462 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 11:07:20,580 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 11:07:20,709 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:07:20,837 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:07:21,126 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:07:21,268 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:07:21,415 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:07:21,562 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:07:21,722 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:07:21,879 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:07:22,045 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:07:22,213 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:07:23,388 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 11:07:23,575 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 11:07:23,770 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:07:23,970 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:07:25,973 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 11:07:26,181 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 11:07:26,395 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 11:07:26,606 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 11:07:26,813 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 11:07:27,002 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 11:07:27,181 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:07:27,356 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 11:07:27,514 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:07:27,668 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 11:07:27,812 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:07:27,946 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 11:07:28,064 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 11:07:28,177 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:07:28,283 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:07:40,504 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 11:07:40,987 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 11:07:41,117 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 11:07:41,253 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:07:41,386 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:07:41,682 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:07:41,813 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:07:41,963 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:07:42,120 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:07:42,283 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:07:42,449 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:07:42,631 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:07:42,810 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:07:43,869 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 11:07:44,056 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 11:07:44,258 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:07:44,462 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:07:44,638 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:07:44,800 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:07:44,957 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 11:07:45,107 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 11:07:45,243 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:07:45,383 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:07:45,514 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:07:45,636 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:07:45,746 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 11:07:45,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:53,909 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:07:54,013 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:07:54,134 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:07:54,292 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:07:54,466 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:07:54,641 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:07:54,823 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:07:55,008 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:07:55,185 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 11:07:55,345 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 11:07:55,495 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 11:07:55,629 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:07:55,760 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 11:07:55,882 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:07:55,993 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:07:56,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:56,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:57,636 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 11:07:57,744 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 11:07:57,864 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 11:07:57,980 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 11:07:58,394 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 11:07:58,522 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 11:07:58,662 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:07:58,802 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:07:59,107 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:07:59,256 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:07:59,414 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:07:59,573 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:07:59,724 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 11:07:59,862 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 11:07:59,992 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:08:00,109 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 11:08:00,216 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 11:08:00,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:08:02,179 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 11:08:02,284 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 11:08:02,402 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 11:08:02,517 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 11:08:02,919 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 11:08:03,037 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 11:08:03,169 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:08:03,302 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:08:03,412 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 11:08:03,522 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:08:03,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:08:03,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:08:05,627 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 11:08:05,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:08:07,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:08:07,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:08:08,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:08:08,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:08:09,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:08:09,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:08:09,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:08:10,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:08:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 39309 backedges. 1480 proven. 2993 refuted. 0 times theorem prover too weak. 34836 trivial. 0 not checked. [2020-07-21 11:08:16,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321919391] [2020-07-21 11:08:16,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:08:16,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 11:08:16,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337480542] [2020-07-21 11:08:16,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 11:08:16,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:08:16,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 11:08:16,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:08:16,729 INFO L87 Difference]: Start difference. First operand 278 states and 889 transitions. Second operand 25 states. [2020-07-21 11:08:20,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:08:20,464 INFO L93 Difference]: Finished difference Result 394 states and 1381 transitions. [2020-07-21 11:08:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 11:08:20,473 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1151 [2020-07-21 11:08:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:08:20,482 INFO L225 Difference]: With dead ends: 394 [2020-07-21 11:08:20,483 INFO L226 Difference]: Without dead ends: 363 [2020-07-21 11:08:20,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2311 GetRequests, 2257 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 11:08:20,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-07-21 11:08:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 336. [2020-07-21 11:08:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-07-21 11:08:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1078 transitions. [2020-07-21 11:08:20,537 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1078 transitions. Word has length 1151 [2020-07-21 11:08:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:08:20,538 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 1078 transitions. [2020-07-21 11:08:20,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 11:08:20,538 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1078 transitions. [2020-07-21 11:08:20,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1933 [2020-07-21 11:08:20,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:08:20,577 INFO L422 BasicCegarLoop]: trace histogram [149, 149, 138, 138, 106, 97, 74, 74, 74, 74, 74, 74, 74, 69, 69, 69, 69, 69, 69, 69, 52, 32, 32, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:08:20,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:08:20,778 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:08:20,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:08:20,780 INFO L82 PathProgramCache]: Analyzing trace with hash -307882690, now seen corresponding path program 28 times [2020-07-21 11:08:20,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:08:20,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973396026] [2020-07-21 11:08:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:08:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:08:22,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 4298 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 11:08:22,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:08:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 112325 backedges. 1458 proven. 5318 refuted. 0 times theorem prover too weak. 105549 trivial. 0 not checked. [2020-07-21 11:08:25,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:08:27,852 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 11:08:27,956 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 11:08:28,071 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 11:08:28,193 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 11:08:28,668 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 11:08:28,790 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 11:08:28,933 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:08:29,070 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 11:08:29,217 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:08:29,369 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:08:29,527 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 11:08:29,684 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 40