/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:46:44,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:46:44,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:46:44,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:46:44,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:46:44,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:46:44,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:46:44,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:46:44,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:46:44,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:46:44,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:46:44,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:46:44,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:46:44,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:46:44,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:46:44,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:46:44,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:46:44,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:46:44,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:46:44,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:46:44,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:46:44,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:46:44,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:46:44,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:46:44,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:46:44,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:46:44,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:46:44,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:46:44,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 16:46:44,959 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:46:44,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:46:44,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:46:44,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:46:44,968 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:46:44,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:46:44,971 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:46:44,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:46:44,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:46:44,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:46:44,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:46:44,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:46:44,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:46:44,973 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:46:44,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:46:44,973 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:46:44,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:46:44,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:46:44,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:46:44,974 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:46:44,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:46:44,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:46:44,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:46:44,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:46:44,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:46:44,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:46:44,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:44,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:46:44,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:46:44,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:46:45,322 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:46:45,340 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:46:45,345 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:46:45,348 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:46:45,348 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:46:45,349 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_25-1.c [2020-07-20 16:46:45,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4854e3ab8/3ea02e6e808145118ee15f0c7aefb917/FLAG6aa3844e0 [2020-07-20 16:46:46,027 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:46:46,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_25-1.c [2020-07-20 16:46:46,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4854e3ab8/3ea02e6e808145118ee15f0c7aefb917/FLAG6aa3844e0 [2020-07-20 16:46:46,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4854e3ab8/3ea02e6e808145118ee15f0c7aefb917 [2020-07-20 16:46:46,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:46:46,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:46:46,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:46:46,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:46:46,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:46:46,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:46:46" (1/1) ... [2020-07-20 16:46:46,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f29f361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:46:46, skipping insertion in model container [2020-07-20 16:46:46,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:46:46" (1/1) ... [2020-07-20 16:46:46,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:46:46,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:46:46,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:46:46,653 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:46:46,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:46:46,684 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:46:46,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:46:46 WrapperNode [2020-07-20 16:46:46,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:46:46,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:46:46,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:46:46,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:46:46,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:46:46" (1/1) ... [2020-07-20 16:46:46,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:46:46" (1/1) ... [2020-07-20 16:46:46,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:46:46" (1/1) ... [2020-07-20 16:46:46,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:46:46" (1/1) ... [2020-07-20 16:46:46,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:46:46" (1/1) ... [2020-07-20 16:46:46,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:46:46" (1/1) ... [2020-07-20 16:46:46,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:46:46" (1/1) ... [2020-07-20 16:46:46,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:46:46,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:46:46,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:46:46,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:46:46,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:46:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:46:46,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:46:46,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:46:46,877 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 16:46:46,877 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 16:46:46,877 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:46:46,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 16:46:46,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:46:46,878 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 16:46:46,878 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 16:46:46,878 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:46:46,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:46:46,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:46:47,080 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:46:47,080 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 16:46:47,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:46:47 BoogieIcfgContainer [2020-07-20 16:46:47,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:46:47,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:46:47,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:46:47,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:46:47,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:46:46" (1/3) ... [2020-07-20 16:46:47,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658c9585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:46:47, skipping insertion in model container [2020-07-20 16:46:47,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:46:46" (2/3) ... [2020-07-20 16:46:47,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658c9585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:46:47, skipping insertion in model container [2020-07-20 16:46:47,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:46:47" (3/3) ... [2020-07-20 16:46:47,095 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_25-1.c [2020-07-20 16:46:47,107 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:46:47,116 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:46:47,132 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:46:47,159 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:46:47,159 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:46:47,159 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:46:47,160 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:46:47,160 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:46:47,160 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:46:47,160 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:46:47,161 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:46:47,178 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 16:46:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 16:46:47,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:46:47,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:46:47,187 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:46:47,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:46:47,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 16:46:47,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:46:47,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013320676] [2020-07-20 16:46:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:47,275 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:46:47,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:46:47,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:46:47,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:46:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:46:47,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:46:47,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013320676] [2020-07-20 16:46:47,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:46:47,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:46:47,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391660024] [2020-07-20 16:46:47,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:46:47,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:46:47,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:46:47,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:46:47,426 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 16:46:47,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:46:47,581 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 16:46:47,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:46:47,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 16:46:47,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:46:47,596 INFO L225 Difference]: With dead ends: 44 [2020-07-20 16:46:47,597 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 16:46:47,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:46:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 16:46:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 16:46:47,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 16:46:47,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 16:46:47,664 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 16:46:47,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:46:47,665 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 16:46:47,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:46:47,665 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 16:46:47,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 16:46:47,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:46:47,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:46:47,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:47,875 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:46:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:46:47,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 16:46:47,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:46:47,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961256459] [2020-07-20 16:46:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:47,911 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:46:47,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:46:47,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:46:47,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:46:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:46:47,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:46:47,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961256459] [2020-07-20 16:46:47,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:46:47,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:46:47,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146833843] [2020-07-20 16:46:47,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:46:47,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:46:47,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:46:47,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:46:47,970 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 16:46:48,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:46:48,059 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 16:46:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:46:48,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 16:46:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:46:48,063 INFO L225 Difference]: With dead ends: 36 [2020-07-20 16:46:48,063 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 16:46:48,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:46:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 16:46:48,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 16:46:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 16:46:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 16:46:48,077 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 16:46:48,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:46:48,077 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 16:46:48,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:46:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 16:46:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 16:46:48,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:46:48,080 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:46:48,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:48,296 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:46:48,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:46:48,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 16:46:48,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:46:48,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261633410] [2020-07-20 16:46:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:48,339 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:46:48,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:46:48,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 16:46:48,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:46:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 16:46:48,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:46:48,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:48,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 16:46:48,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261633410] [2020-07-20 16:46:48,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:46:48,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 16:46:48,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703757638] [2020-07-20 16:46:48,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 16:46:48,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:46:48,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 16:46:48,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 16:46:48,731 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 16:46:48,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:46:48,890 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 16:46:48,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 16:46:48,891 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 16:46:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:46:48,894 INFO L225 Difference]: With dead ends: 41 [2020-07-20 16:46:48,894 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 16:46:48,895 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 [2020-07-20 16:46:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 16:46:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 16:46:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 16:46:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 16:46:48,907 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 16:46:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:46:48,907 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 16:46:48,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 16:46:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 16:46:48,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 16:46:48,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:46:48,910 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:46:49,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:49,126 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:46:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:46:49,127 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 16:46:49,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:46:49,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983072546] [2020-07-20 16:46:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:49,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:46:49,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:46:49,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 16:46:49,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:46:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 16:46:49,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:46:49,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:49,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 16:46:49,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983072546] [2020-07-20 16:46:49,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:46:49,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 16:46:49,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125430705] [2020-07-20 16:46:49,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 16:46:49,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:46:49,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 16:46:49,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 16:46:49,443 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 16:46:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:46:49,602 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 16:46:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 16:46:49,603 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 16:46:49,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:46:49,605 INFO L225 Difference]: With dead ends: 46 [2020-07-20 16:46:49,606 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 16:46:49,607 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 [2020-07-20 16:46:49,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 16:46:49,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 16:46:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 16:46:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 16:46:49,618 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 16:46:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:46:49,618 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 16:46:49,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 16:46:49,619 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 16:46:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 16:46:49,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:46:49,625 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:46:49,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:49,839 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:46:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:46:49,840 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 16:46:49,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:46:49,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598783965] [2020-07-20 16:46:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:49,876 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:46:49,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:46:49,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:46:49,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:46:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 16:46:49,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:46:50,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:50,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:50,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 16:46:50,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598783965] [2020-07-20 16:46:50,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:46:50,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 16:46:50,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265304040] [2020-07-20 16:46:50,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 16:46:50,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:46:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 16:46:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 16:46:50,351 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 16:46:50,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:46:50,557 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 16:46:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:46:50,558 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 16:46:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:46:50,561 INFO L225 Difference]: With dead ends: 51 [2020-07-20 16:46:50,562 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 16:46:50,563 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 [2020-07-20 16:46:50,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 16:46:50,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 16:46:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 16:46:50,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 16:46:50,575 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 16:46:50,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:46:50,576 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 16:46:50,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 16:46:50,576 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 16:46:50,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 16:46:50,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:46:50,578 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:46:50,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:50,787 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:46:50,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:46:50,788 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 16:46:50,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:46:50,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231967398] [2020-07-20 16:46:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:50,825 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:46:50,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:46:50,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:46:50,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:46:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 16:46:50,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:46:51,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:51,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 16:46:51,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231967398] [2020-07-20 16:46:51,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:46:51,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-20 16:46:51,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576804782] [2020-07-20 16:46:51,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 16:46:51,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:46:51,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 16:46:51,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-20 16:46:51,253 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-20 16:46:51,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:46:51,585 INFO L93 Difference]: Finished difference Result 84 states and 136 transitions. [2020-07-20 16:46:51,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:46:51,586 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 16:46:51,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:46:51,594 INFO L225 Difference]: With dead ends: 84 [2020-07-20 16:46:51,594 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 16:46:51,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:46:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 16:46:51,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-07-20 16:46:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 16:46:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2020-07-20 16:46:51,626 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 67 transitions. Word has length 40 [2020-07-20 16:46:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:46:51,634 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 67 transitions. [2020-07-20 16:46:51,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 16:46:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 67 transitions. [2020-07-20 16:46:51,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 16:46:51,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:46:51,644 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:46:51,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:51,858 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:46:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:46:51,859 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-07-20 16:46:51,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:46:51,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691366677] [2020-07-20 16:46:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:51,942 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:46:51,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:46:51,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:46:51,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:46:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:46:52,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:46:52,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:52,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 16:46:52,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691366677] [2020-07-20 16:46:52,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:46:52,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 16:46:52,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182029144] [2020-07-20 16:46:52,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 16:46:52,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:46:52,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 16:46:52,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 16:46:52,391 INFO L87 Difference]: Start difference. First operand 47 states and 67 transitions. Second operand 12 states. [2020-07-20 16:46:52,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:46:52,572 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-07-20 16:46:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:46:52,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-07-20 16:46:52,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:46:52,579 INFO L225 Difference]: With dead ends: 63 [2020-07-20 16:46:52,580 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 16:46:52,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 16:46:52,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 16:46:52,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-07-20 16:46:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 16:46:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 77 transitions. [2020-07-20 16:46:52,594 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 77 transitions. Word has length 41 [2020-07-20 16:46:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:46:52,595 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 77 transitions. [2020-07-20 16:46:52,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 16:46:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 77 transitions. [2020-07-20 16:46:52,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 16:46:52,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:46:52,598 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:46:52,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:52,802 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:46:52,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:46:52,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1291563674, now seen corresponding path program 1 times [2020-07-20 16:46:52,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:46:52,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515943367] [2020-07-20 16:46:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:52,851 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:46:52,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:46:52,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 16:46:52,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:46:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 16:46:52,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:46:53,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:53,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 16:46:53,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515943367] [2020-07-20 16:46:53,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:46:53,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 16:46:53,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837381469] [2020-07-20 16:46:53,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 16:46:53,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:46:53,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 16:46:53,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 16:46:53,164 INFO L87 Difference]: Start difference. First operand 51 states and 77 transitions. Second operand 10 states. [2020-07-20 16:46:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:46:53,318 INFO L93 Difference]: Finished difference Result 65 states and 105 transitions. [2020-07-20 16:46:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 16:46:53,319 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-07-20 16:46:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:46:53,321 INFO L225 Difference]: With dead ends: 65 [2020-07-20 16:46:53,321 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 16:46:53,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 16:46:53,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 16:46:53,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-07-20 16:46:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 16:46:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 82 transitions. [2020-07-20 16:46:53,337 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 82 transitions. Word has length 53 [2020-07-20 16:46:53,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:46:53,338 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 82 transitions. [2020-07-20 16:46:53,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 16:46:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 82 transitions. [2020-07-20 16:46:53,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 16:46:53,342 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:46:53,342 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:46:53,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:53,556 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:46:53,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:46:53,556 INFO L82 PathProgramCache]: Analyzing trace with hash 736840020, now seen corresponding path program 2 times [2020-07-20 16:46:53,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:46:53,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23917673] [2020-07-20 16:46:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:53,611 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:46:53,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:46:53,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:46:53,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:46:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-20 16:46:53,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:46:54,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:54,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:54,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:54,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:54,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:54,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 59 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-20 16:46:54,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23917673] [2020-07-20 16:46:54,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:46:54,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 16:46:54,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397649574] [2020-07-20 16:46:54,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 16:46:54,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:46:54,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 16:46:54,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:46:54,399 INFO L87 Difference]: Start difference. First operand 53 states and 82 transitions. Second operand 14 states. [2020-07-20 16:46:54,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:46:54,636 INFO L93 Difference]: Finished difference Result 75 states and 134 transitions. [2020-07-20 16:46:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:46:54,637 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 78 [2020-07-20 16:46:54,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:46:54,639 INFO L225 Difference]: With dead ends: 75 [2020-07-20 16:46:54,640 INFO L226 Difference]: Without dead ends: 71 [2020-07-20 16:46:54,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 137 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:46:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-20 16:46:54,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-07-20 16:46:54,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 16:46:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 90 transitions. [2020-07-20 16:46:54,658 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 90 transitions. Word has length 78 [2020-07-20 16:46:54,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:46:54,659 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 90 transitions. [2020-07-20 16:46:54,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 16:46:54,659 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 90 transitions. [2020-07-20 16:46:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 16:46:54,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:46:54,662 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:46:54,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:54,873 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:46:54,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:46:54,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1583364703, now seen corresponding path program 1 times [2020-07-20 16:46:54,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:46:54,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452800032] [2020-07-20 16:46:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:54,935 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:46:54,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:46:54,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:46:54,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:46:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:46:55,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:46:55,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:55,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-20 16:46:55,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452800032] [2020-07-20 16:46:55,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:46:55,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-20 16:46:55,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65454514] [2020-07-20 16:46:55,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 16:46:55,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:46:55,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 16:46:55,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-20 16:46:55,438 INFO L87 Difference]: Start difference. First operand 56 states and 90 transitions. Second operand 12 states. [2020-07-20 16:46:55,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:46:55,660 INFO L93 Difference]: Finished difference Result 114 states and 219 transitions. [2020-07-20 16:46:55,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:46:55,660 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-07-20 16:46:55,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:46:55,662 INFO L225 Difference]: With dead ends: 114 [2020-07-20 16:46:55,662 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 16:46:55,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:46:55,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 16:46:55,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-07-20 16:46:55,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 16:46:55,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 101 transitions. [2020-07-20 16:46:55,691 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 101 transitions. Word has length 67 [2020-07-20 16:46:55,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:46:55,694 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 101 transitions. [2020-07-20 16:46:55,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 16:46:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 101 transitions. [2020-07-20 16:46:55,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 16:46:55,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:46:55,696 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:46:55,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:55,898 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:46:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:46:55,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1763147687, now seen corresponding path program 2 times [2020-07-20 16:46:55,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:46:55,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949517998] [2020-07-20 16:46:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:55,949 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:46:55,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:46:55,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 16:46:55,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:46:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 16:46:56,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:46:56,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:56,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:56,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:56,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 34 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-20 16:46:56,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949517998] [2020-07-20 16:46:56,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:46:56,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2020-07-20 16:46:56,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364158048] [2020-07-20 16:46:56,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 16:46:56,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:46:56,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 16:46:56,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:46:56,789 INFO L87 Difference]: Start difference. First operand 61 states and 101 transitions. Second operand 17 states. [2020-07-20 16:46:57,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:46:57,291 INFO L93 Difference]: Finished difference Result 131 states and 252 transitions. [2020-07-20 16:46:57,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 16:46:57,292 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-07-20 16:46:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:46:57,294 INFO L225 Difference]: With dead ends: 131 [2020-07-20 16:46:57,294 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 16:46:57,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 116 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2020-07-20 16:46:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 16:46:57,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2020-07-20 16:46:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-20 16:46:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 106 transitions. [2020-07-20 16:46:57,309 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 106 transitions. Word has length 68 [2020-07-20 16:46:57,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:46:57,310 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 106 transitions. [2020-07-20 16:46:57,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 16:46:57,310 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 106 transitions. [2020-07-20 16:46:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 16:46:57,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:46:57,313 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:46:57,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:57,526 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:46:57,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:46:57,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1986769418, now seen corresponding path program 1 times [2020-07-20 16:46:57,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:46:57,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079794121] [2020-07-20 16:46:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:57,585 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:46:57,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:46:57,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:46:57,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:46:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 39 proven. 53 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 16:46:57,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:46:58,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:58,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:58,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:58,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:58,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:58,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:58,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:58,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:58,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:46:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 39 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-20 16:46:58,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079794121] [2020-07-20 16:46:58,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:46:58,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2020-07-20 16:46:58,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567451552] [2020-07-20 16:46:58,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 16:46:58,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:46:58,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 16:46:58,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-20 16:46:58,659 INFO L87 Difference]: Start difference. First operand 68 states and 106 transitions. Second operand 21 states. [2020-07-20 16:46:59,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:46:59,693 INFO L93 Difference]: Finished difference Result 186 states and 366 transitions. [2020-07-20 16:46:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 16:46:59,694 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2020-07-20 16:46:59,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:46:59,698 INFO L225 Difference]: With dead ends: 186 [2020-07-20 16:46:59,698 INFO L226 Difference]: Without dead ends: 124 [2020-07-20 16:46:59,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 145 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 16:46:59,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-20 16:46:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2020-07-20 16:46:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-07-20 16:46:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 179 transitions. [2020-07-20 16:46:59,724 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 179 transitions. Word has length 82 [2020-07-20 16:46:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:46:59,725 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 179 transitions. [2020-07-20 16:46:59,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 16:46:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 179 transitions. [2020-07-20 16:46:59,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 16:46:59,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:46:59,727 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:46:59,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:46:59,942 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:46:59,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:46:59,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 3 times [2020-07-20 16:46:59,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:46:59,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917626865] [2020-07-20 16:46:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:00,010 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:47:00,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:00,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:47:00,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 16:47:00,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:00,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:00,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:00,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:00,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-20 16:47:00,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917626865] [2020-07-20 16:47:00,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:00,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 16:47:00,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328456658] [2020-07-20 16:47:00,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 16:47:00,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:00,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 16:47:00,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:47:00,640 INFO L87 Difference]: Start difference. First operand 110 states and 179 transitions. Second operand 14 states. [2020-07-20 16:47:00,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:00,867 INFO L93 Difference]: Finished difference Result 114 states and 182 transitions. [2020-07-20 16:47:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:47:00,868 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-07-20 16:47:00,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:00,870 INFO L225 Difference]: With dead ends: 114 [2020-07-20 16:47:00,871 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 16:47:00,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:47:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 16:47:00,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2020-07-20 16:47:00,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-20 16:47:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 159 transitions. [2020-07-20 16:47:00,897 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 159 transitions. Word has length 68 [2020-07-20 16:47:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:00,897 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 159 transitions. [2020-07-20 16:47:00,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 16:47:00,898 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 159 transitions. [2020-07-20 16:47:00,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-20 16:47:00,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:00,900 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:01,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:01,108 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:01,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:01,110 INFO L82 PathProgramCache]: Analyzing trace with hash 918304791, now seen corresponding path program 4 times [2020-07-20 16:47:01,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:01,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533792672] [2020-07-20 16:47:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:01,179 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:47:01,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:01,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 16:47:01,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 33 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-07-20 16:47:01,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:01,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:01,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:01,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:02,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:02,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:02,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-07-20 16:47:02,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533792672] [2020-07-20 16:47:02,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:02,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2020-07-20 16:47:02,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820631656] [2020-07-20 16:47:02,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 16:47:02,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:02,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 16:47:02,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:47:02,145 INFO L87 Difference]: Start difference. First operand 102 states and 159 transitions. Second operand 19 states. [2020-07-20 16:47:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:02,756 INFO L93 Difference]: Finished difference Result 269 states and 520 transitions. [2020-07-20 16:47:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 16:47:02,757 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-07-20 16:47:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:02,763 INFO L225 Difference]: With dead ends: 269 [2020-07-20 16:47:02,763 INFO L226 Difference]: Without dead ends: 168 [2020-07-20 16:47:02,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2020-07-20 16:47:02,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-20 16:47:02,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 144. [2020-07-20 16:47:02,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-20 16:47:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 247 transitions. [2020-07-20 16:47:02,799 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 247 transitions. Word has length 94 [2020-07-20 16:47:02,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:02,802 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 247 transitions. [2020-07-20 16:47:02,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 16:47:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 247 transitions. [2020-07-20 16:47:02,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-20 16:47:02,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:02,806 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:03,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:03,022 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:03,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:03,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1676117994, now seen corresponding path program 2 times [2020-07-20 16:47:03,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:03,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270910761] [2020-07-20 16:47:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:03,144 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:47:03,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:03,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:47:03,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-20 16:47:03,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:03,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:03,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:03,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:03,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-07-20 16:47:03,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270910761] [2020-07-20 16:47:03,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:03,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 16:47:03,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268307541] [2020-07-20 16:47:03,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 16:47:03,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:03,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 16:47:03,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 16:47:03,611 INFO L87 Difference]: Start difference. First operand 144 states and 247 transitions. Second operand 12 states. [2020-07-20 16:47:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:03,780 INFO L93 Difference]: Finished difference Result 167 states and 289 transitions. [2020-07-20 16:47:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:47:03,782 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-07-20 16:47:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:03,785 INFO L225 Difference]: With dead ends: 167 [2020-07-20 16:47:03,785 INFO L226 Difference]: Without dead ends: 163 [2020-07-20 16:47:03,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 16:47:03,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-20 16:47:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-07-20 16:47:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-20 16:47:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 272 transitions. [2020-07-20 16:47:03,813 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 272 transitions. Word has length 80 [2020-07-20 16:47:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:03,814 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 272 transitions. [2020-07-20 16:47:03,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 16:47:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 272 transitions. [2020-07-20 16:47:03,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-20 16:47:03,819 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:03,819 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:04,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:04,033 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:04,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2019487259, now seen corresponding path program 3 times [2020-07-20 16:47:04,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:04,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576085440] [2020-07-20 16:47:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:04,110 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:47:04,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:04,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:47:04,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 177 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-07-20 16:47:04,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:04,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:04,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:05,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:05,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:05,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 71 proven. 141 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-07-20 16:47:05,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576085440] [2020-07-20 16:47:05,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:05,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2020-07-20 16:47:05,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503906341] [2020-07-20 16:47:05,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 16:47:05,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:05,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 16:47:05,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-20 16:47:05,438 INFO L87 Difference]: Start difference. First operand 157 states and 272 transitions. Second operand 21 states. [2020-07-20 16:47:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:06,092 INFO L93 Difference]: Finished difference Result 369 states and 701 transitions. [2020-07-20 16:47:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 16:47:06,093 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 120 [2020-07-20 16:47:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:06,099 INFO L225 Difference]: With dead ends: 369 [2020-07-20 16:47:06,099 INFO L226 Difference]: Without dead ends: 218 [2020-07-20 16:47:06,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 213 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 16:47:06,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-20 16:47:06,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 173. [2020-07-20 16:47:06,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-20 16:47:06,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 306 transitions. [2020-07-20 16:47:06,134 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 306 transitions. Word has length 120 [2020-07-20 16:47:06,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:06,135 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 306 transitions. [2020-07-20 16:47:06,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 16:47:06,135 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 306 transitions. [2020-07-20 16:47:06,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-20 16:47:06,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:06,140 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:06,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:06,355 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:06,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:06,356 INFO L82 PathProgramCache]: Analyzing trace with hash -923530611, now seen corresponding path program 4 times [2020-07-20 16:47:06,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:06,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752792972] [2020-07-20 16:47:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:06,440 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:47:06,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:06,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:47:06,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-07-20 16:47:06,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:06,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:06,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:06,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:06,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 55 proven. 16 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-07-20 16:47:06,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752792972] [2020-07-20 16:47:06,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:06,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 16:47:06,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861123889] [2020-07-20 16:47:06,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 16:47:06,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:06,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 16:47:06,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 16:47:06,930 INFO L87 Difference]: Start difference. First operand 173 states and 306 transitions. Second operand 12 states. [2020-07-20 16:47:07,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:07,116 INFO L93 Difference]: Finished difference Result 191 states and 349 transitions. [2020-07-20 16:47:07,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:47:07,117 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 92 [2020-07-20 16:47:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:07,121 INFO L225 Difference]: With dead ends: 191 [2020-07-20 16:47:07,122 INFO L226 Difference]: Without dead ends: 187 [2020-07-20 16:47:07,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 169 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 16:47:07,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-20 16:47:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 176. [2020-07-20 16:47:07,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-07-20 16:47:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 316 transitions. [2020-07-20 16:47:07,145 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 316 transitions. Word has length 92 [2020-07-20 16:47:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:07,148 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 316 transitions. [2020-07-20 16:47:07,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 16:47:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 316 transitions. [2020-07-20 16:47:07,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-20 16:47:07,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:07,152 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:07,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:07,367 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:07,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:07,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1156827333, now seen corresponding path program 2 times [2020-07-20 16:47:07,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:07,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947419567] [2020-07-20 16:47:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:07,457 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:47:07,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:07,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 16:47:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 84 proven. 110 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-07-20 16:47:07,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:08,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:08,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:08,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:08,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:08,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:08,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:08,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:08,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:08,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 84 proven. 116 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-20 16:47:09,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947419567] [2020-07-20 16:47:09,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:09,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 23 [2020-07-20 16:47:09,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095423645] [2020-07-20 16:47:09,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 16:47:09,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:09,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 16:47:09,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-07-20 16:47:09,047 INFO L87 Difference]: Start difference. First operand 176 states and 316 transitions. Second operand 23 states. [2020-07-20 16:47:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:09,918 INFO L93 Difference]: Finished difference Result 393 states and 799 transitions. [2020-07-20 16:47:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 16:47:09,918 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 118 [2020-07-20 16:47:09,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:09,923 INFO L225 Difference]: With dead ends: 393 [2020-07-20 16:47:09,924 INFO L226 Difference]: Without dead ends: 222 [2020-07-20 16:47:09,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 207 SyntacticMatches, 13 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=1221, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 16:47:09,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-20 16:47:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 183. [2020-07-20 16:47:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-20 16:47:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 321 transitions. [2020-07-20 16:47:09,951 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 321 transitions. Word has length 118 [2020-07-20 16:47:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:09,951 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 321 transitions. [2020-07-20 16:47:09,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 16:47:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 321 transitions. [2020-07-20 16:47:09,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-07-20 16:47:09,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:09,955 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:10,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:10,170 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:10,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:10,171 INFO L82 PathProgramCache]: Analyzing trace with hash 767209796, now seen corresponding path program 3 times [2020-07-20 16:47:10,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:10,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556927305] [2020-07-20 16:47:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:10,266 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:47:10,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:10,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 16:47:10,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 20 proven. 96 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-20 16:47:10,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:11,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:11,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:11,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:11,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:11,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:11,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 20 proven. 104 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-07-20 16:47:11,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556927305] [2020-07-20 16:47:11,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:11,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 16:47:11,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230814357] [2020-07-20 16:47:11,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 16:47:11,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:11,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 16:47:11,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:47:11,391 INFO L87 Difference]: Start difference. First operand 183 states and 321 transitions. Second operand 16 states. [2020-07-20 16:47:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:11,631 INFO L93 Difference]: Finished difference Result 203 states and 360 transitions. [2020-07-20 16:47:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 16:47:11,632 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2020-07-20 16:47:11,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:11,637 INFO L225 Difference]: With dead ends: 203 [2020-07-20 16:47:11,637 INFO L226 Difference]: Without dead ends: 199 [2020-07-20 16:47:11,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 185 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 16:47:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-07-20 16:47:11,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 188. [2020-07-20 16:47:11,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-20 16:47:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 333 transitions. [2020-07-20 16:47:11,658 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 333 transitions. Word has length 104 [2020-07-20 16:47:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:11,659 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 333 transitions. [2020-07-20 16:47:11,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 16:47:11,659 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 333 transitions. [2020-07-20 16:47:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-20 16:47:11,663 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:11,663 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:11,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:11,877 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:11,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:11,878 INFO L82 PathProgramCache]: Analyzing trace with hash -650257977, now seen corresponding path program 5 times [2020-07-20 16:47:11,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:11,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690323858] [2020-07-20 16:47:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:11,976 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:47:11,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:11,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 16:47:11,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 210 proven. 31 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 16:47:12,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:12,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:12,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:13,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:13,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:13,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-07-20 16:47:13,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690323858] [2020-07-20 16:47:13,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:13,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2020-07-20 16:47:13,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362371425] [2020-07-20 16:47:13,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 16:47:13,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:13,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 16:47:13,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:47:13,380 INFO L87 Difference]: Start difference. First operand 188 states and 333 transitions. Second operand 17 states. [2020-07-20 16:47:13,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:13,776 INFO L93 Difference]: Finished difference Result 374 states and 685 transitions. [2020-07-20 16:47:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 16:47:13,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 120 [2020-07-20 16:47:13,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:13,780 INFO L225 Difference]: With dead ends: 374 [2020-07-20 16:47:13,781 INFO L226 Difference]: Without dead ends: 192 [2020-07-20 16:47:13,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 214 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2020-07-20 16:47:13,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-20 16:47:13,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-07-20 16:47:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-20 16:47:13,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 327 transitions. [2020-07-20 16:47:13,801 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 327 transitions. Word has length 120 [2020-07-20 16:47:13,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:13,801 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 327 transitions. [2020-07-20 16:47:13,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 16:47:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 327 transitions. [2020-07-20 16:47:13,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 16:47:13,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:13,805 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:14,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:14,019 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:14,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:14,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 6 times [2020-07-20 16:47:14,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:14,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132033292] [2020-07-20 16:47:14,023 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:14,171 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:47:14,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:14,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 16:47:14,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 20 proven. 107 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-20 16:47:14,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:14,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:15,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:15,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:15,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 20 proven. 117 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-20 16:47:15,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132033292] [2020-07-20 16:47:15,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:15,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 16:47:15,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650456665] [2020-07-20 16:47:15,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 16:47:15,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:15,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 16:47:15,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:47:15,278 INFO L87 Difference]: Start difference. First operand 190 states and 327 transitions. Second operand 16 states. [2020-07-20 16:47:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:15,522 INFO L93 Difference]: Finished difference Result 219 states and 399 transitions. [2020-07-20 16:47:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 16:47:15,523 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2020-07-20 16:47:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:15,526 INFO L225 Difference]: With dead ends: 219 [2020-07-20 16:47:15,526 INFO L226 Difference]: Without dead ends: 215 [2020-07-20 16:47:15,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 193 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 16:47:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-20 16:47:15,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2020-07-20 16:47:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-20 16:47:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 375 transitions. [2020-07-20 16:47:15,546 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 375 transitions. Word has length 109 [2020-07-20 16:47:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:15,547 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 375 transitions. [2020-07-20 16:47:15,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 16:47:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 375 transitions. [2020-07-20 16:47:15,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-07-20 16:47:15,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:15,550 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:15,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:15,764 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:15,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1569040385, now seen corresponding path program 3 times [2020-07-20 16:47:15,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:15,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150331906] [2020-07-20 16:47:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:15,868 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:47:15,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:15,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:47:15,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 115 proven. 75 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-07-20 16:47:15,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:16,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:16,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:17,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:17,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:17,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:17,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 115 proven. 78 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-07-20 16:47:17,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150331906] [2020-07-20 16:47:17,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:17,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 19 [2020-07-20 16:47:17,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828340146] [2020-07-20 16:47:17,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 16:47:17,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:17,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 16:47:17,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:47:17,237 INFO L87 Difference]: Start difference. First operand 207 states and 375 transitions. Second operand 19 states. [2020-07-20 16:47:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:17,850 INFO L93 Difference]: Finished difference Result 435 states and 816 transitions. [2020-07-20 16:47:17,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 16:47:17,852 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 119 [2020-07-20 16:47:17,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:17,859 INFO L225 Difference]: With dead ends: 435 [2020-07-20 16:47:17,859 INFO L226 Difference]: Without dead ends: 234 [2020-07-20 16:47:17,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 208 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2020-07-20 16:47:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-20 16:47:17,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 212. [2020-07-20 16:47:17,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-20 16:47:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 371 transitions. [2020-07-20 16:47:17,918 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 371 transitions. Word has length 119 [2020-07-20 16:47:17,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:17,919 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 371 transitions. [2020-07-20 16:47:17,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 16:47:17,919 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 371 transitions. [2020-07-20 16:47:17,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 16:47:17,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:17,923 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:18,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:18,136 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:18,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1905629551, now seen corresponding path program 7 times [2020-07-20 16:47:18,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:18,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283317232] [2020-07-20 16:47:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:18,321 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:47:18,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:18,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:47:18,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 47 proven. 86 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-07-20 16:47:18,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:19,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:19,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:19,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:19,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:19,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:19,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 47 proven. 91 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2020-07-20 16:47:19,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283317232] [2020-07-20 16:47:19,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:19,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 16:47:19,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057669493] [2020-07-20 16:47:19,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 16:47:19,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:19,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 16:47:19,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:47:19,436 INFO L87 Difference]: Start difference. First operand 212 states and 371 transitions. Second operand 14 states. [2020-07-20 16:47:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:19,723 INFO L93 Difference]: Finished difference Result 242 states and 431 transitions. [2020-07-20 16:47:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:47:19,724 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 121 [2020-07-20 16:47:19,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:19,729 INFO L225 Difference]: With dead ends: 242 [2020-07-20 16:47:19,729 INFO L226 Difference]: Without dead ends: 238 [2020-07-20 16:47:19,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 221 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:47:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-20 16:47:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 212. [2020-07-20 16:47:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-20 16:47:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 371 transitions. [2020-07-20 16:47:19,759 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 371 transitions. Word has length 121 [2020-07-20 16:47:19,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:19,763 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 371 transitions. [2020-07-20 16:47:19,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 16:47:19,763 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 371 transitions. [2020-07-20 16:47:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-20 16:47:19,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:19,771 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:19,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:19,985 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash -71686390, now seen corresponding path program 8 times [2020-07-20 16:47:19,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:19,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703402045] [2020-07-20 16:47:19,986 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:20,117 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:47:20,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:20,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:47:20,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 76 proven. 73 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2020-07-20 16:47:20,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:20,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:20,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:20,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:20,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:20,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:20,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:20,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 76 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-07-20 16:47:21,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703402045] [2020-07-20 16:47:21,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:21,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 16:47:21,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007178495] [2020-07-20 16:47:21,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 16:47:21,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:21,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 16:47:21,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:47:21,016 INFO L87 Difference]: Start difference. First operand 212 states and 371 transitions. Second operand 14 states. [2020-07-20 16:47:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:21,245 INFO L93 Difference]: Finished difference Result 232 states and 409 transitions. [2020-07-20 16:47:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:47:21,246 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2020-07-20 16:47:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:21,251 INFO L225 Difference]: With dead ends: 232 [2020-07-20 16:47:21,252 INFO L226 Difference]: Without dead ends: 228 [2020-07-20 16:47:21,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 245 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:47:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-20 16:47:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 212. [2020-07-20 16:47:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-20 16:47:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 371 transitions. [2020-07-20 16:47:21,279 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 371 transitions. Word has length 133 [2020-07-20 16:47:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:21,280 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 371 transitions. [2020-07-20 16:47:21,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 16:47:21,281 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 371 transitions. [2020-07-20 16:47:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-07-20 16:47:21,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:21,287 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:21,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:21,503 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:21,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:21,504 INFO L82 PathProgramCache]: Analyzing trace with hash 857210524, now seen corresponding path program 9 times [2020-07-20 16:47:21,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:21,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215155177] [2020-07-20 16:47:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:21,684 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 16:47:21,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:21,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 16:47:21,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 350 proven. 32 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2020-07-20 16:47:21,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:23,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:23,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:23,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:23,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:23,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 81 proven. 204 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2020-07-20 16:47:23,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215155177] [2020-07-20 16:47:23,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:23,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2020-07-20 16:47:23,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390289400] [2020-07-20 16:47:23,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 16:47:23,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:23,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 16:47:23,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:47:23,596 INFO L87 Difference]: Start difference. First operand 212 states and 371 transitions. Second operand 17 states. [2020-07-20 16:47:24,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:24,175 INFO L93 Difference]: Finished difference Result 418 states and 774 transitions. [2020-07-20 16:47:24,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 16:47:24,176 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 158 [2020-07-20 16:47:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:24,182 INFO L225 Difference]: With dead ends: 418 [2020-07-20 16:47:24,182 INFO L226 Difference]: Without dead ends: 209 [2020-07-20 16:47:24,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 290 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-07-20 16:47:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-07-20 16:47:24,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 183. [2020-07-20 16:47:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-20 16:47:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 288 transitions. [2020-07-20 16:47:24,211 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 288 transitions. Word has length 158 [2020-07-20 16:47:24,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:24,212 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 288 transitions. [2020-07-20 16:47:24,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 16:47:24,212 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 288 transitions. [2020-07-20 16:47:24,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-07-20 16:47:24,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:24,216 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:24,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:24,430 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:24,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:24,431 INFO L82 PathProgramCache]: Analyzing trace with hash 247206723, now seen corresponding path program 10 times [2020-07-20 16:47:24,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:24,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356109840] [2020-07-20 16:47:24,431 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:24,578 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:47:24,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:24,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:47:24,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 134 proven. 31 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 16:47:24,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:25,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:25,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:25,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:25,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:25,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:25,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 136 proven. 34 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2020-07-20 16:47:25,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356109840] [2020-07-20 16:47:25,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:25,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 16:47:25,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633345747] [2020-07-20 16:47:25,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 16:47:25,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:25,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 16:47:25,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:47:25,548 INFO L87 Difference]: Start difference. First operand 183 states and 288 transitions. Second operand 14 states. [2020-07-20 16:47:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:25,800 INFO L93 Difference]: Finished difference Result 190 states and 298 transitions. [2020-07-20 16:47:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:47:25,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 145 [2020-07-20 16:47:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:25,806 INFO L225 Difference]: With dead ends: 190 [2020-07-20 16:47:25,806 INFO L226 Difference]: Without dead ends: 186 [2020-07-20 16:47:25,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 270 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:47:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-07-20 16:47:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 166. [2020-07-20 16:47:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-20 16:47:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 255 transitions. [2020-07-20 16:47:25,827 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 255 transitions. Word has length 145 [2020-07-20 16:47:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:25,828 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 255 transitions. [2020-07-20 16:47:25,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 16:47:25,829 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 255 transitions. [2020-07-20 16:47:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-07-20 16:47:25,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:25,834 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 12, 12, 11, 9, 9, 9, 9, 9, 9, 9, 9, 8, 6, 6, 6, 6, 6, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:26,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:26,048 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:26,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1851579368, now seen corresponding path program 5 times [2020-07-20 16:47:26,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:26,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697931640] [2020-07-20 16:47:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:26,249 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:47:26,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:26,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:47:26,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 638 proven. 149 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2020-07-20 16:47:26,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:27,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:27,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:27,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:27,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:27,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:27,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:27,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:28,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 210 proven. 269 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2020-07-20 16:47:28,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697931640] [2020-07-20 16:47:28,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:28,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 19 [2020-07-20 16:47:28,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966161929] [2020-07-20 16:47:28,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 16:47:28,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:28,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 16:47:28,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:47:28,099 INFO L87 Difference]: Start difference. First operand 166 states and 255 transitions. Second operand 19 states. [2020-07-20 16:47:28,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:28,927 INFO L93 Difference]: Finished difference Result 375 states and 645 transitions. [2020-07-20 16:47:28,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 16:47:28,929 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 213 [2020-07-20 16:47:28,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:28,932 INFO L225 Difference]: With dead ends: 375 [2020-07-20 16:47:28,932 INFO L226 Difference]: Without dead ends: 194 [2020-07-20 16:47:28,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 396 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 16:47:28,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-07-20 16:47:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 172. [2020-07-20 16:47:28,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-20 16:47:28,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 275 transitions. [2020-07-20 16:47:28,958 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 275 transitions. Word has length 213 [2020-07-20 16:47:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:28,958 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 275 transitions. [2020-07-20 16:47:28,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 16:47:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 275 transitions. [2020-07-20 16:47:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-07-20 16:47:28,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:28,963 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 19, 17, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 9, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:29,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:29,177 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:29,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:29,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1113707265, now seen corresponding path program 11 times [2020-07-20 16:47:29,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:29,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355787947] [2020-07-20 16:47:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:29,381 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:47:29,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:29,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:47:29,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3635 backedges. 2038 proven. 134 refuted. 0 times theorem prover too weak. 1463 trivial. 0 not checked. [2020-07-20 16:47:29,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:31,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:31,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:31,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:31,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:31,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:31,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:31,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:31,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:31,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3635 backedges. 274 proven. 598 refuted. 0 times theorem prover too weak. 2763 trivial. 0 not checked. [2020-07-20 16:47:31,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355787947] [2020-07-20 16:47:31,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:31,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 19 [2020-07-20 16:47:31,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610959243] [2020-07-20 16:47:31,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 16:47:31,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:31,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 16:47:31,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:47:31,745 INFO L87 Difference]: Start difference. First operand 172 states and 275 transitions. Second operand 19 states. [2020-07-20 16:47:32,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:32,468 INFO L93 Difference]: Finished difference Result 438 states and 811 transitions. [2020-07-20 16:47:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 16:47:32,469 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 361 [2020-07-20 16:47:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:32,473 INFO L225 Difference]: With dead ends: 438 [2020-07-20 16:47:32,473 INFO L226 Difference]: Without dead ends: 233 [2020-07-20 16:47:32,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 691 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 16:47:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-07-20 16:47:32,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 205. [2020-07-20 16:47:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-07-20 16:47:32,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 348 transitions. [2020-07-20 16:47:32,501 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 348 transitions. Word has length 361 [2020-07-20 16:47:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:32,502 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 348 transitions. [2020-07-20 16:47:32,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 16:47:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 348 transitions. [2020-07-20 16:47:32,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-07-20 16:47:32,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:32,508 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 12, 11, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:32,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:32,723 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:32,724 INFO L82 PathProgramCache]: Analyzing trace with hash 192450495, now seen corresponding path program 12 times [2020-07-20 16:47:32,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:32,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3494852] [2020-07-20 16:47:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:47:32,939 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:47:32,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:32,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 16:47:32,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 97 proven. 314 refuted. 0 times theorem prover too weak. 1294 trivial. 0 not checked. [2020-07-20 16:47:33,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:34,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:34,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:34,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:34,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:34,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:34,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:34,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:34,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 97 proven. 324 refuted. 0 times theorem prover too weak. 1284 trivial. 0 not checked. [2020-07-20 16:47:34,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3494852] [2020-07-20 16:47:34,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:34,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 16:47:34,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029802481] [2020-07-20 16:47:34,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 16:47:34,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:34,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 16:47:34,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:47:34,780 INFO L87 Difference]: Start difference. First operand 205 states and 348 transitions. Second operand 16 states. [2020-07-20 16:47:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:35,094 INFO L93 Difference]: Finished difference Result 233 states and 407 transitions. [2020-07-20 16:47:35,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 16:47:35,095 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 252 [2020-07-20 16:47:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:35,101 INFO L225 Difference]: With dead ends: 233 [2020-07-20 16:47:35,101 INFO L226 Difference]: Without dead ends: 229 [2020-07-20 16:47:35,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 479 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 16:47:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-20 16:47:35,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 215. [2020-07-20 16:47:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-20 16:47:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 375 transitions. [2020-07-20 16:47:35,133 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 375 transitions. Word has length 252 [2020-07-20 16:47:35,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:35,134 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 375 transitions. [2020-07-20 16:47:35,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 16:47:35,135 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 375 transitions. [2020-07-20 16:47:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-07-20 16:47:35,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:35,140 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 17, 11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:35,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:35,356 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:35,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:35,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1043096335, now seen corresponding path program 13 times [2020-07-20 16:47:35,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:35,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221272724] [2020-07-20 16:47:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:47:35,546 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:47:35,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:35,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 16:47:35,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 852 proven. 290 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2020-07-20 16:47:35,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:37,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:37,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:37,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:37,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:37,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:37,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:38,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:38,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:38,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:38,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:38,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:38,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 236 proven. 515 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2020-07-20 16:47:39,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221272724] [2020-07-20 16:47:39,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:39,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-20 16:47:39,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005034700] [2020-07-20 16:47:39,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 16:47:39,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:39,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 16:47:39,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-07-20 16:47:39,068 INFO L87 Difference]: Start difference. First operand 215 states and 375 transitions. Second operand 25 states. [2020-07-20 16:47:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:40,289 INFO L93 Difference]: Finished difference Result 470 states and 915 transitions. [2020-07-20 16:47:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 16:47:40,293 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 249 [2020-07-20 16:47:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:40,298 INFO L225 Difference]: With dead ends: 470 [2020-07-20 16:47:40,298 INFO L226 Difference]: Without dead ends: 255 [2020-07-20 16:47:40,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 456 SyntacticMatches, 19 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=1498, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 16:47:40,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-20 16:47:40,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 187. [2020-07-20 16:47:40,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-20 16:47:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 300 transitions. [2020-07-20 16:47:40,328 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 300 transitions. Word has length 249 [2020-07-20 16:47:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:40,328 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 300 transitions. [2020-07-20 16:47:40,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 16:47:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 300 transitions. [2020-07-20 16:47:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-20 16:47:40,332 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:40,333 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:40,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:40,547 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:40,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1970797993, now seen corresponding path program 14 times [2020-07-20 16:47:40,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:40,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91049983] [2020-07-20 16:47:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:47:40,853 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:47:40,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:40,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 16:47:40,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 361 proven. 365 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2020-07-20 16:47:41,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:42,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:42,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:42,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:43,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:43,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:43,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:43,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:43,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:43,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:43,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:43,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:43,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 361 proven. 380 refuted. 0 times theorem prover too weak. 987 trivial. 0 not checked. [2020-07-20 16:47:44,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91049983] [2020-07-20 16:47:44,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:44,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-20 16:47:44,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320606653] [2020-07-20 16:47:44,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 16:47:44,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:44,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 16:47:44,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-07-20 16:47:44,036 INFO L87 Difference]: Start difference. First operand 187 states and 300 transitions. Second operand 25 states. [2020-07-20 16:47:45,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:45,537 INFO L93 Difference]: Finished difference Result 517 states and 967 transitions. [2020-07-20 16:47:45,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 16:47:45,538 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 254 [2020-07-20 16:47:45,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:45,543 INFO L225 Difference]: With dead ends: 517 [2020-07-20 16:47:45,543 INFO L226 Difference]: Without dead ends: 302 [2020-07-20 16:47:45,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 465 SyntacticMatches, 19 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=344, Invalid=1726, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 16:47:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-07-20 16:47:45,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 251. [2020-07-20 16:47:45,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-07-20 16:47:45,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 458 transitions. [2020-07-20 16:47:45,574 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 458 transitions. Word has length 254 [2020-07-20 16:47:45,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:45,575 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 458 transitions. [2020-07-20 16:47:45,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 16:47:45,575 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 458 transitions. [2020-07-20 16:47:45,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-07-20 16:47:45,580 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:45,580 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 17, 12, 11, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:45,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:45,794 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:45,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:45,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1129930033, now seen corresponding path program 15 times [2020-07-20 16:47:45,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:45,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690936033] [2020-07-20 16:47:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:47:46,021 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:47:46,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:46,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 16:47:46,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 437 proven. 281 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2020-07-20 16:47:46,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:47,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:47,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:47,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:48,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:48,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:48,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:48,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:48,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 439 proven. 294 refuted. 0 times theorem prover too weak. 984 trivial. 0 not checked. [2020-07-20 16:47:49,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690936033] [2020-07-20 16:47:49,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:49,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-20 16:47:49,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145224141] [2020-07-20 16:47:49,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 16:47:49,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:49,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 16:47:49,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-07-20 16:47:49,047 INFO L87 Difference]: Start difference. First operand 251 states and 458 transitions. Second operand 25 states. [2020-07-20 16:47:50,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:50,703 INFO L93 Difference]: Finished difference Result 643 states and 1367 transitions. [2020-07-20 16:47:50,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 16:47:50,705 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 252 [2020-07-20 16:47:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:50,715 INFO L225 Difference]: With dead ends: 643 [2020-07-20 16:47:50,716 INFO L226 Difference]: Without dead ends: 342 [2020-07-20 16:47:50,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 461 SyntacticMatches, 19 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=1730, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 16:47:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-07-20 16:47:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 270. [2020-07-20 16:47:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-07-20 16:47:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 512 transitions. [2020-07-20 16:47:50,780 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 512 transitions. Word has length 252 [2020-07-20 16:47:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:50,781 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 512 transitions. [2020-07-20 16:47:50,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 16:47:50,781 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 512 transitions. [2020-07-20 16:47:50,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-07-20 16:47:50,789 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:50,790 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 19, 19, 13, 12, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:51,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:51,006 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:51,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:51,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1491587273, now seen corresponding path program 16 times [2020-07-20 16:47:51,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:51,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735842686] [2020-07-20 16:47:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:47:51,271 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:47:51,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:51,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 16:47:51,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 474 proven. 273 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-07-20 16:47:51,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:52,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:52,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:53,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:53,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:53,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:53,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:53,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:53,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 474 proven. 285 refuted. 0 times theorem prover too weak. 1357 trivial. 0 not checked. [2020-07-20 16:47:53,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735842686] [2020-07-20 16:47:53,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:53,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 23 [2020-07-20 16:47:53,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972298387] [2020-07-20 16:47:53,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 16:47:53,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:53,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 16:47:53,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-07-20 16:47:53,829 INFO L87 Difference]: Start difference. First operand 270 states and 512 transitions. Second operand 23 states. [2020-07-20 16:47:55,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:55,162 INFO L93 Difference]: Finished difference Result 677 states and 1542 transitions. [2020-07-20 16:47:55,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 16:47:55,163 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 278 [2020-07-20 16:47:55,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:55,173 INFO L225 Difference]: With dead ends: 677 [2020-07-20 16:47:55,174 INFO L226 Difference]: Without dead ends: 374 [2020-07-20 16:47:55,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 517 SyntacticMatches, 17 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 16:47:55,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-07-20 16:47:55,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 270. [2020-07-20 16:47:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-07-20 16:47:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 512 transitions. [2020-07-20 16:47:55,216 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 512 transitions. Word has length 278 [2020-07-20 16:47:55,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:55,217 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 512 transitions. [2020-07-20 16:47:55,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 16:47:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 512 transitions. [2020-07-20 16:47:55,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-07-20 16:47:55,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:55,222 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:55,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:55,437 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:55,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:55,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1025098094, now seen corresponding path program 4 times [2020-07-20 16:47:55,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:55,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775313297] [2020-07-20 16:47:55,439 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:47:55,695 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:47:55,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:55,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 16:47:55,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:47:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 85 proven. 407 refuted. 0 times theorem prover too weak. 984 trivial. 0 not checked. [2020-07-20 16:47:55,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:47:57,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:58,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:58,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:58,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:58,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:58,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:58,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:58,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:58,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:58,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:47:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 85 proven. 428 refuted. 0 times theorem prover too weak. 963 trivial. 0 not checked. [2020-07-20 16:47:58,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775313297] [2020-07-20 16:47:58,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:47:58,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 16:47:58,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049267913] [2020-07-20 16:47:58,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 16:47:58,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:47:58,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 16:47:58,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:47:58,972 INFO L87 Difference]: Start difference. First operand 270 states and 512 transitions. Second operand 20 states. [2020-07-20 16:47:59,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:47:59,425 INFO L93 Difference]: Finished difference Result 287 states and 561 transitions. [2020-07-20 16:47:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 16:47:59,426 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 234 [2020-07-20 16:47:59,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:47:59,432 INFO L225 Difference]: With dead ends: 287 [2020-07-20 16:47:59,432 INFO L226 Difference]: Without dead ends: 283 [2020-07-20 16:47:59,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 437 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 16:47:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-07-20 16:47:59,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 225. [2020-07-20 16:47:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-20 16:47:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 397 transitions. [2020-07-20 16:47:59,457 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 397 transitions. Word has length 234 [2020-07-20 16:47:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:47:59,458 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 397 transitions. [2020-07-20 16:47:59,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 16:47:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 397 transitions. [2020-07-20 16:47:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-07-20 16:47:59,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:47:59,465 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 25, 24, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:47:59,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:47:59,679 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:47:59,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:47:59,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1461916829, now seen corresponding path program 17 times [2020-07-20 16:47:59,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:47:59,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089671527] [2020-07-20 16:47:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:47:59,970 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 16:47:59,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:47:59,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 16:47:59,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:48:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5644 backedges. 2884 proven. 736 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2020-07-20 16:48:00,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:48:03,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:03,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:04,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:04,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:04,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:04,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:04,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:04,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:05,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:05,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:05,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:05,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:06,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:06,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5644 backedges. 424 proven. 1416 refuted. 0 times theorem prover too weak. 3804 trivial. 0 not checked. [2020-07-20 16:48:06,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089671527] [2020-07-20 16:48:06,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:48:06,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 31 [2020-07-20 16:48:06,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100702517] [2020-07-20 16:48:06,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 16:48:06,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:48:06,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 16:48:06,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2020-07-20 16:48:06,252 INFO L87 Difference]: Start difference. First operand 225 states and 397 transitions. Second operand 31 states. [2020-07-20 16:48:08,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:48:08,590 INFO L93 Difference]: Finished difference Result 569 states and 1171 transitions. [2020-07-20 16:48:08,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 16:48:08,592 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 446 [2020-07-20 16:48:08,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:48:08,599 INFO L225 Difference]: With dead ends: 569 [2020-07-20 16:48:08,599 INFO L226 Difference]: Without dead ends: 350 [2020-07-20 16:48:08,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 841 SyntacticMatches, 21 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=496, Invalid=2696, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 16:48:08,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-07-20 16:48:08,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 298. [2020-07-20 16:48:08,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-07-20 16:48:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 542 transitions. [2020-07-20 16:48:08,636 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 542 transitions. Word has length 446 [2020-07-20 16:48:08,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:48:08,637 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 542 transitions. [2020-07-20 16:48:08,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 16:48:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 542 transitions. [2020-07-20 16:48:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-07-20 16:48:08,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:48:08,643 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 13, 12, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 6, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:48:08,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:48:08,857 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:48:08,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:48:08,858 INFO L82 PathProgramCache]: Analyzing trace with hash -961725027, now seen corresponding path program 18 times [2020-07-20 16:48:08,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:48:08,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280881873] [2020-07-20 16:48:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:48:09,162 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:48:09,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:48:09,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 16:48:09,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:48:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 809 proven. 174 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2020-07-20 16:48:09,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:48:11,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:11,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:11,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:12,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:12,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:12,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:12,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:12,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:12,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 194 proven. 422 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-07-20 16:48:12,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280881873] [2020-07-20 16:48:12,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:48:12,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 23 [2020-07-20 16:48:12,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574111645] [2020-07-20 16:48:12,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 16:48:12,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:48:12,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 16:48:12,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2020-07-20 16:48:12,354 INFO L87 Difference]: Start difference. First operand 298 states and 542 transitions. Second operand 23 states. [2020-07-20 16:48:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:48:13,475 INFO L93 Difference]: Finished difference Result 611 states and 1178 transitions. [2020-07-20 16:48:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 16:48:13,477 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 230 [2020-07-20 16:48:13,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:48:13,482 INFO L225 Difference]: With dead ends: 611 [2020-07-20 16:48:13,483 INFO L226 Difference]: Without dead ends: 315 [2020-07-20 16:48:13,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 421 SyntacticMatches, 17 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 16:48:13,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-07-20 16:48:13,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 304. [2020-07-20 16:48:13,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-07-20 16:48:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 552 transitions. [2020-07-20 16:48:13,515 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 552 transitions. Word has length 230 [2020-07-20 16:48:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:48:13,516 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 552 transitions. [2020-07-20 16:48:13,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 16:48:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 552 transitions. [2020-07-20 16:48:13,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2020-07-20 16:48:13,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:48:13,524 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 27, 27, 22, 21, 16, 16, 16, 16, 16, 16, 16, 13, 13, 13, 13, 13, 13, 13, 10, 9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:48:13,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:48:13,739 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:48:13,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:48:13,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1665470626, now seen corresponding path program 19 times [2020-07-20 16:48:13,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:48:13,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671314352] [2020-07-20 16:48:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:48:14,104 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:48:14,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:48:14,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 16:48:14,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:48:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4621 backedges. 2589 proven. 207 refuted. 0 times theorem prover too weak. 1825 trivial. 0 not checked. [2020-07-20 16:48:14,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:48:17,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:17,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:17,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:17,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:17,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:18,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:18,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:18,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:18,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4621 backedges. 323 proven. 928 refuted. 0 times theorem prover too weak. 3370 trivial. 0 not checked. [2020-07-20 16:48:18,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671314352] [2020-07-20 16:48:18,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:48:18,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 23 [2020-07-20 16:48:18,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792687349] [2020-07-20 16:48:18,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 16:48:18,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:48:18,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 16:48:18,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-07-20 16:48:18,674 INFO L87 Difference]: Start difference. First operand 304 states and 552 transitions. Second operand 23 states. [2020-07-20 16:48:19,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:48:19,912 INFO L93 Difference]: Finished difference Result 617 states and 1141 transitions. [2020-07-20 16:48:19,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 16:48:19,914 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 404 [2020-07-20 16:48:19,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:48:19,918 INFO L225 Difference]: With dead ends: 617 [2020-07-20 16:48:19,918 INFO L226 Difference]: Without dead ends: 315 [2020-07-20 16:48:19,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 769 SyntacticMatches, 17 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 16:48:19,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-07-20 16:48:19,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 299. [2020-07-20 16:48:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-07-20 16:48:19,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 530 transitions. [2020-07-20 16:48:19,948 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 530 transitions. Word has length 404 [2020-07-20 16:48:19,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:48:19,948 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 530 transitions. [2020-07-20 16:48:19,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 16:48:19,948 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 530 transitions. [2020-07-20 16:48:19,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-07-20 16:48:19,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:48:19,953 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 17, 16, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:48:20,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:48:20,168 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:48:20,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:48:20,168 INFO L82 PathProgramCache]: Analyzing trace with hash 837790271, now seen corresponding path program 20 times [2020-07-20 16:48:20,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:48:20,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635649445] [2020-07-20 16:48:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:48:20,519 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:48:20,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:48:20,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 16:48:20,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:48:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2632 backedges. 105 proven. 613 refuted. 0 times theorem prover too weak. 1914 trivial. 0 not checked. [2020-07-20 16:48:20,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:48:22,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:23,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:23,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:23,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:24,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:24,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:24,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2632 backedges. 105 proven. 637 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2020-07-20 16:48:24,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635649445] [2020-07-20 16:48:24,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:48:24,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 16:48:24,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043308751] [2020-07-20 16:48:24,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 16:48:24,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:48:24,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 16:48:24,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:48:24,313 INFO L87 Difference]: Start difference. First operand 299 states and 530 transitions. Second operand 20 states. [2020-07-20 16:48:24,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:48:24,874 INFO L93 Difference]: Finished difference Result 323 states and 582 transitions. [2020-07-20 16:48:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 16:48:24,876 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 310 [2020-07-20 16:48:24,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:48:24,881 INFO L225 Difference]: With dead ends: 323 [2020-07-20 16:48:24,882 INFO L226 Difference]: Without dead ends: 319 [2020-07-20 16:48:24,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 587 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 16:48:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-07-20 16:48:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 308. [2020-07-20 16:48:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-07-20 16:48:24,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 544 transitions. [2020-07-20 16:48:24,911 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 544 transitions. Word has length 310 [2020-07-20 16:48:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:48:24,912 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 544 transitions. [2020-07-20 16:48:24,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 16:48:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 544 transitions. [2020-07-20 16:48:24,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2020-07-20 16:48:24,918 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:48:24,919 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 25, 25, 21, 20, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 10, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:48:25,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:48:25,133 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:48:25,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:48:25,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1548566994, now seen corresponding path program 21 times [2020-07-20 16:48:25,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:48:25,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086729005] [2020-07-20 16:48:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:48:25,531 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:48:25,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:48:25,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 16:48:25,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:48:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4024 backedges. 531 proven. 791 refuted. 0 times theorem prover too weak. 2702 trivial. 0 not checked. [2020-07-20 16:48:26,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:48:28,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:28,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:28,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:29,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:29,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:29,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:29,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:30,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:30,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:30,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:30,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:30,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:31,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4024 backedges. 533 proven. 809 refuted. 0 times theorem prover too weak. 2682 trivial. 0 not checked. [2020-07-20 16:48:31,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086729005] [2020-07-20 16:48:31,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:48:31,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-20 16:48:31,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706103756] [2020-07-20 16:48:31,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 16:48:31,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:48:31,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 16:48:31,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-07-20 16:48:31,176 INFO L87 Difference]: Start difference. First operand 308 states and 544 transitions. Second operand 27 states. [2020-07-20 16:48:32,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:48:32,811 INFO L93 Difference]: Finished difference Result 748 states and 1476 transitions. [2020-07-20 16:48:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 16:48:32,818 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 378 [2020-07-20 16:48:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:48:32,827 INFO L225 Difference]: With dead ends: 748 [2020-07-20 16:48:32,827 INFO L226 Difference]: Without dead ends: 428 [2020-07-20 16:48:32,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 709 SyntacticMatches, 21 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=408, Invalid=2042, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 16:48:32,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-07-20 16:48:32,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 374. [2020-07-20 16:48:32,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-07-20 16:48:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 725 transitions. [2020-07-20 16:48:32,874 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 725 transitions. Word has length 378 [2020-07-20 16:48:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:48:32,874 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 725 transitions. [2020-07-20 16:48:32,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 16:48:32,875 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 725 transitions. [2020-07-20 16:48:32,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-07-20 16:48:32,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:48:32,880 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 16, 15, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:48:33,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:48:33,096 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:48:33,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:48:33,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1659072448, now seen corresponding path program 22 times [2020-07-20 16:48:33,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:48:33,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519406569] [2020-07-20 16:48:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:48:33,500 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:48:33,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:48:33,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:48:33,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:48:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2389 backedges. 133 proven. 459 refuted. 0 times theorem prover too weak. 1797 trivial. 0 not checked. [2020-07-20 16:48:33,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:48:35,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:35,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:35,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:35,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:36,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:36,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:36,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:36,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:36,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:36,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2389 backedges. 133 proven. 475 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2020-07-20 16:48:36,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519406569] [2020-07-20 16:48:36,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:48:36,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 16:48:36,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609358416] [2020-07-20 16:48:36,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 16:48:36,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:48:36,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 16:48:36,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:48:36,773 INFO L87 Difference]: Start difference. First operand 374 states and 725 transitions. Second operand 18 states. [2020-07-20 16:48:37,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:48:37,264 INFO L93 Difference]: Finished difference Result 400 states and 764 transitions. [2020-07-20 16:48:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:48:37,272 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 296 [2020-07-20 16:48:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:48:37,279 INFO L225 Difference]: With dead ends: 400 [2020-07-20 16:48:37,280 INFO L226 Difference]: Without dead ends: 396 [2020-07-20 16:48:37,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 563 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 16:48:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-07-20 16:48:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 367. [2020-07-20 16:48:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-07-20 16:48:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 698 transitions. [2020-07-20 16:48:37,322 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 698 transitions. Word has length 296 [2020-07-20 16:48:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:48:37,323 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 698 transitions. [2020-07-20 16:48:37,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 16:48:37,323 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 698 transitions. [2020-07-20 16:48:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-07-20 16:48:37,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:48:37,332 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 29, 29, 23, 21, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 14, 14, 13, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:48:37,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:48:37,547 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:48:37,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:48:37,548 INFO L82 PathProgramCache]: Analyzing trace with hash 629335334, now seen corresponding path program 23 times [2020-07-20 16:48:37,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:48:37,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099212138] [2020-07-20 16:48:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:48:38,000 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:48:38,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:48:38,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 16:48:38,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:48:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5239 backedges. 779 proven. 1005 refuted. 0 times theorem prover too weak. 3455 trivial. 0 not checked. [2020-07-20 16:48:38,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:48:42,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:42,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:42,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:42,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:43,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:43,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:43,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:43,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:43,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:43,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:43,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:44,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:44,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:45,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:45,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:45,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:45,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:45,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5239 backedges. 779 proven. 1039 refuted. 0 times theorem prover too weak. 3421 trivial. 0 not checked. [2020-07-20 16:48:45,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099212138] [2020-07-20 16:48:45,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:48:45,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 33 [2020-07-20 16:48:45,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378083462] [2020-07-20 16:48:45,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 16:48:45,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:48:45,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 16:48:45,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 16:48:45,949 INFO L87 Difference]: Start difference. First operand 367 states and 698 transitions. Second operand 33 states. [2020-07-20 16:48:49,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:48:49,709 INFO L93 Difference]: Finished difference Result 930 states and 2074 transitions. [2020-07-20 16:48:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-20 16:48:49,711 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 429 [2020-07-20 16:48:49,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:48:49,720 INFO L225 Difference]: With dead ends: 930 [2020-07-20 16:48:49,720 INFO L226 Difference]: Without dead ends: 569 [2020-07-20 16:48:49,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 803 SyntacticMatches, 23 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=620, Invalid=3412, Unknown=0, NotChecked=0, Total=4032 [2020-07-20 16:48:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2020-07-20 16:48:49,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 481. [2020-07-20 16:48:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-07-20 16:48:49,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1005 transitions. [2020-07-20 16:48:49,768 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1005 transitions. Word has length 429 [2020-07-20 16:48:49,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:48:49,768 INFO L479 AbstractCegarLoop]: Abstraction has 481 states and 1005 transitions. [2020-07-20 16:48:49,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 16:48:49,769 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1005 transitions. [2020-07-20 16:48:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2020-07-20 16:48:49,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:48:49,778 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 32, 32, 23, 23, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:48:49,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:48:49,993 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:48:49,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:48:49,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1664173660, now seen corresponding path program 24 times [2020-07-20 16:48:49,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:48:49,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325914174] [2020-07-20 16:48:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:48:50,470 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:48:50,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:48:50,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 16:48:50,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:48:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5894 backedges. 3388 proven. 329 refuted. 0 times theorem prover too weak. 2177 trivial. 0 not checked. [2020-07-20 16:48:50,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:48:54,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:54,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:54,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:54,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:55,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:55,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:55,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:55,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:55,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:55,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:56,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:56,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:56,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:56,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:56,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:48:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5894 backedges. 559 proven. 1037 refuted. 0 times theorem prover too weak. 4298 trivial. 0 not checked. [2020-07-20 16:48:56,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325914174] [2020-07-20 16:48:56,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:48:56,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-20 16:48:56,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480827918] [2020-07-20 16:48:56,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 16:48:56,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:48:56,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 16:48:56,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-07-20 16:48:56,666 INFO L87 Difference]: Start difference. First operand 481 states and 1005 transitions. Second operand 25 states. [2020-07-20 16:48:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:48:58,605 INFO L93 Difference]: Finished difference Result 1024 states and 2159 transitions. [2020-07-20 16:48:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 16:48:58,607 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 455 [2020-07-20 16:48:58,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:48:58,618 INFO L225 Difference]: With dead ends: 1024 [2020-07-20 16:48:58,619 INFO L226 Difference]: Without dead ends: 524 [2020-07-20 16:48:58,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 867 SyntacticMatches, 19 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=340, Invalid=1730, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 16:48:58,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-07-20 16:48:58,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 475. [2020-07-20 16:48:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-07-20 16:48:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 940 transitions. [2020-07-20 16:48:58,670 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 940 transitions. Word has length 455 [2020-07-20 16:48:58,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:48:58,671 INFO L479 AbstractCegarLoop]: Abstraction has 475 states and 940 transitions. [2020-07-20 16:48:58,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 16:48:58,672 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 940 transitions. [2020-07-20 16:48:58,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2020-07-20 16:48:58,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:48:58,684 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 42, 42, 33, 31, 23, 23, 23, 23, 23, 23, 23, 21, 21, 21, 21, 21, 21, 21, 14, 12, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:48:58,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:48:58,897 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:48:58,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:48:58,898 INFO L82 PathProgramCache]: Analyzing trace with hash -952986393, now seen corresponding path program 25 times [2020-07-20 16:48:58,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:48:58,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118421985] [2020-07-20 16:48:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:48:59,391 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 16:48:59,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:48:59,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 16:48:59,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:48:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10613 backedges. 4414 proven. 206 refuted. 0 times theorem prover too weak. 5993 trivial. 0 not checked. [2020-07-20 16:48:59,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:49:05,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:05,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:05,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:05,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:05,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:05,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:06,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:06,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:06,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:06,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:07,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:07,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10613 backedges. 377 proven. 1919 refuted. 0 times theorem prover too weak. 8317 trivial. 0 not checked. [2020-07-20 16:49:07,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118421985] [2020-07-20 16:49:07,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:49:07,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-20 16:49:07,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326591869] [2020-07-20 16:49:07,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 16:49:07,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:49:07,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 16:49:07,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2020-07-20 16:49:07,326 INFO L87 Difference]: Start difference. First operand 475 states and 940 transitions. Second operand 25 states. [2020-07-20 16:49:08,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:49:08,447 INFO L93 Difference]: Finished difference Result 937 states and 1935 transitions. [2020-07-20 16:49:08,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 16:49:08,449 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 605 [2020-07-20 16:49:08,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:49:08,455 INFO L225 Difference]: With dead ends: 937 [2020-07-20 16:49:08,456 INFO L226 Difference]: Without dead ends: 468 [2020-07-20 16:49:08,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1224 GetRequests, 1167 SyntacticMatches, 19 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 16:49:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-07-20 16:49:08,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 438. [2020-07-20 16:49:08,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-07-20 16:49:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 842 transitions. [2020-07-20 16:49:08,499 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 842 transitions. Word has length 605 [2020-07-20 16:49:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:49:08,499 INFO L479 AbstractCegarLoop]: Abstraction has 438 states and 842 transitions. [2020-07-20 16:49:08,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 16:49:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 842 transitions. [2020-07-20 16:49:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-07-20 16:49:08,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:49:08,507 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 14, 14, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:49:08,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:49:08,721 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:49:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:49:08,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1338756441, now seen corresponding path program 26 times [2020-07-20 16:49:08,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:49:08,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144784008] [2020-07-20 16:49:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:49:09,219 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:49:09,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:49:09,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 16:49:09,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:49:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2558 backedges. 589 proven. 399 refuted. 0 times theorem prover too weak. 1570 trivial. 0 not checked. [2020-07-20 16:49:09,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:49:10,674 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:49:11,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:11,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:12,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:12,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:12,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:12,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:12,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:13,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:14,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:14,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:14,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:14,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2558 backedges. 589 proven. 417 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2020-07-20 16:49:14,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144784008] [2020-07-20 16:49:14,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:49:14,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-20 16:49:14,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700451095] [2020-07-20 16:49:14,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 16:49:14,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:49:14,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 16:49:14,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2020-07-20 16:49:14,898 INFO L87 Difference]: Start difference. First operand 438 states and 842 transitions. Second operand 27 states. [2020-07-20 16:49:17,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:49:17,024 INFO L93 Difference]: Finished difference Result 912 states and 1779 transitions. [2020-07-20 16:49:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 16:49:17,026 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 305 [2020-07-20 16:49:17,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:49:17,034 INFO L225 Difference]: With dead ends: 912 [2020-07-20 16:49:17,034 INFO L226 Difference]: Without dead ends: 480 [2020-07-20 16:49:17,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 563 SyntacticMatches, 21 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=280, Invalid=1442, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 16:49:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2020-07-20 16:49:17,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 448. [2020-07-20 16:49:17,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-07-20 16:49:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 824 transitions. [2020-07-20 16:49:17,080 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 824 transitions. Word has length 305 [2020-07-20 16:49:17,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:49:17,081 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 824 transitions. [2020-07-20 16:49:17,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 16:49:17,081 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 824 transitions. [2020-07-20 16:49:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 16:49:17,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:49:17,090 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 17, 16, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:49:17,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:49:17,305 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:49:17,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:49:17,306 INFO L82 PathProgramCache]: Analyzing trace with hash -494348191, now seen corresponding path program 27 times [2020-07-20 16:49:17,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:49:17,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091792813] [2020-07-20 16:49:17,306 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:49:17,830 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:49:17,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:49:17,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:49:17,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:49:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3088 backedges. 174 proven. 506 refuted. 0 times theorem prover too weak. 2408 trivial. 0 not checked. [2020-07-20 16:49:18,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:49:20,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:20,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:21,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:21,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:21,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:21,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:21,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:21,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3088 backedges. 174 proven. 522 refuted. 0 times theorem prover too weak. 2392 trivial. 0 not checked. [2020-07-20 16:49:21,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091792813] [2020-07-20 16:49:21,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:49:21,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 16:49:21,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703981922] [2020-07-20 16:49:21,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 16:49:21,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:49:21,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 16:49:21,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:49:21,778 INFO L87 Difference]: Start difference. First operand 448 states and 824 transitions. Second operand 18 states. [2020-07-20 16:49:22,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:49:22,248 INFO L93 Difference]: Finished difference Result 464 states and 861 transitions. [2020-07-20 16:49:22,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:49:22,250 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 334 [2020-07-20 16:49:22,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:49:22,258 INFO L225 Difference]: With dead ends: 464 [2020-07-20 16:49:22,259 INFO L226 Difference]: Without dead ends: 460 [2020-07-20 16:49:22,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 639 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 16:49:22,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-07-20 16:49:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 443. [2020-07-20 16:49:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-07-20 16:49:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 810 transitions. [2020-07-20 16:49:22,295 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 810 transitions. Word has length 334 [2020-07-20 16:49:22,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:49:22,296 INFO L479 AbstractCegarLoop]: Abstraction has 443 states and 810 transitions. [2020-07-20 16:49:22,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 16:49:22,296 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 810 transitions. [2020-07-20 16:49:22,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 16:49:22,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:49:22,302 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 17, 16, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:49:22,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:49:22,516 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:49:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:49:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash 43414927, now seen corresponding path program 28 times [2020-07-20 16:49:22,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:49:22,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061293474] [2020-07-20 16:49:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:49:23,065 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:49:23,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:49:23,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:49:23,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:49:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3088 backedges. 235 proven. 445 refuted. 0 times theorem prover too weak. 2408 trivial. 0 not checked. [2020-07-20 16:49:23,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:49:25,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:26,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:26,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:26,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:26,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:26,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:26,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3088 backedges. 237 proven. 459 refuted. 0 times theorem prover too weak. 2392 trivial. 0 not checked. [2020-07-20 16:49:27,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061293474] [2020-07-20 16:49:27,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:49:27,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 16:49:27,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20946577] [2020-07-20 16:49:27,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 16:49:27,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:49:27,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 16:49:27,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:49:27,248 INFO L87 Difference]: Start difference. First operand 443 states and 810 transitions. Second operand 18 states. [2020-07-20 16:49:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:49:27,817 INFO L93 Difference]: Finished difference Result 455 states and 834 transitions. [2020-07-20 16:49:27,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:49:27,819 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 334 [2020-07-20 16:49:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:49:27,828 INFO L225 Difference]: With dead ends: 455 [2020-07-20 16:49:27,829 INFO L226 Difference]: Without dead ends: 451 [2020-07-20 16:49:27,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 639 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 16:49:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-07-20 16:49:27,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 441. [2020-07-20 16:49:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-07-20 16:49:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 805 transitions. [2020-07-20 16:49:27,872 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 805 transitions. Word has length 334 [2020-07-20 16:49:27,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:49:27,873 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 805 transitions. [2020-07-20 16:49:27,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 16:49:27,873 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 805 transitions. [2020-07-20 16:49:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-07-20 16:49:27,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:49:27,881 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 28, 28, 21, 20, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 14, 14, 14, 8, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:49:28,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:49:28,095 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:49:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:49:28,096 INFO L82 PathProgramCache]: Analyzing trace with hash -447990560, now seen corresponding path program 29 times [2020-07-20 16:49:28,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:49:28,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691403717] [2020-07-20 16:49:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:49:28,754 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:49:28,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:49:28,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 16:49:28,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:49:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5200 backedges. 2663 proven. 434 refuted. 0 times theorem prover too weak. 2103 trivial. 0 not checked. [2020-07-20 16:49:29,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:49:32,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:32,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:32,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:32,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:33,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:34,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:34,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:35,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:35,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:35,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:35,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:35,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5200 backedges. 602 proven. 878 refuted. 0 times theorem prover too weak. 3720 trivial. 0 not checked. [2020-07-20 16:49:35,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691403717] [2020-07-20 16:49:35,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:49:35,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-20 16:49:35,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514654555] [2020-07-20 16:49:35,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 16:49:35,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:49:35,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 16:49:35,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2020-07-20 16:49:35,817 INFO L87 Difference]: Start difference. First operand 441 states and 805 transitions. Second operand 25 states. [2020-07-20 16:49:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:49:37,932 INFO L93 Difference]: Finished difference Result 915 states and 1691 transitions. [2020-07-20 16:49:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 16:49:37,935 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 426 [2020-07-20 16:49:37,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:49:37,940 INFO L225 Difference]: With dead ends: 915 [2020-07-20 16:49:37,941 INFO L226 Difference]: Without dead ends: 476 [2020-07-20 16:49:37,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 867 GetRequests, 809 SyntacticMatches, 19 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 16:49:37,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-07-20 16:49:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 448. [2020-07-20 16:49:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-07-20 16:49:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 815 transitions. [2020-07-20 16:49:37,980 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 815 transitions. Word has length 426 [2020-07-20 16:49:37,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:49:37,981 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 815 transitions. [2020-07-20 16:49:37,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 16:49:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 815 transitions. [2020-07-20 16:49:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 16:49:37,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:49:37,991 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 32, 32, 23, 23, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 16, 9, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:49:38,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:49:38,204 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:49:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:49:38,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1084603858, now seen corresponding path program 30 times [2020-07-20 16:49:38,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:49:38,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535640549] [2020-07-20 16:49:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:49:38,799 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:49:38,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:49:38,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 16:49:38,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:49:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6618 backedges. 922 proven. 957 refuted. 0 times theorem prover too weak. 4739 trivial. 0 not checked. [2020-07-20 16:49:39,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:49:42,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:42,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:42,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:42,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:42,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:43,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:45,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:45,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:46,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:47,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:47,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:47,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:47,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:47,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:49:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6618 backedges. 926 proven. 979 refuted. 0 times theorem prover too weak. 4713 trivial. 0 not checked. [2020-07-20 16:49:47,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535640549] [2020-07-20 16:49:47,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:49:47,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 29 [2020-07-20 16:49:47,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326834120] [2020-07-20 16:49:47,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 16:49:47,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:49:47,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 16:49:47,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2020-07-20 16:49:47,839 INFO L87 Difference]: Start difference. First operand 448 states and 815 transitions. Second operand 29 states. [2020-07-20 16:49:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:49:50,699 INFO L93 Difference]: Finished difference Result 989 states and 1849 transitions. [2020-07-20 16:49:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 16:49:50,700 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 479 [2020-07-20 16:49:50,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:49:50,706 INFO L225 Difference]: With dead ends: 989 [2020-07-20 16:49:50,706 INFO L226 Difference]: Without dead ends: 537 [2020-07-20 16:49:50,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 907 SyntacticMatches, 23 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=400, Invalid=2150, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 16:49:50,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2020-07-20 16:49:50,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 476. [2020-07-20 16:49:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-07-20 16:49:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 892 transitions. [2020-07-20 16:49:50,732 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 892 transitions. Word has length 479 [2020-07-20 16:49:50,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:49:50,733 INFO L479 AbstractCegarLoop]: Abstraction has 476 states and 892 transitions. [2020-07-20 16:49:50,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 16:49:50,733 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 892 transitions. [2020-07-20 16:49:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-07-20 16:49:50,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:49:50,741 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 52, 52, 40, 40, 33, 33, 33, 33, 33, 33, 33, 27, 26, 26, 26, 26, 26, 26, 26, 14, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:49:50,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:49:50,941 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:49:50,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:49:50,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1030765260, now seen corresponding path program 31 times [2020-07-20 16:49:50,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:49:50,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277025772] [2020-07-20 16:49:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 16:49:51,565 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:49:51,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:49:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 16:49:51,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:49:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 19120 backedges. 1464 proven. 2466 refuted. 0 times theorem prover too weak. 15190 trivial. 0 not checked. [2020-07-20 16:49:52,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:49:58,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:00,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:00,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:01,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:01,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:01,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:02,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:02,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:02,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:02,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:05,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:05,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:06,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:07,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:07,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:07,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:08,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:08,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:08,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 19120 backedges. 1468 proven. 2502 refuted. 0 times theorem prover too weak. 15150 trivial. 0 not checked. [2020-07-20 16:50:08,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277025772] [2020-07-20 16:50:08,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:50:08,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 35 [2020-07-20 16:50:08,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114617996] [2020-07-20 16:50:08,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 16:50:08,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:50:08,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 16:50:08,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 16:50:08,638 INFO L87 Difference]: Start difference. First operand 476 states and 892 transitions. Second operand 35 states. [2020-07-20 16:50:15,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:50:15,163 INFO L93 Difference]: Finished difference Result 1259 states and 2831 transitions. [2020-07-20 16:50:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-20 16:50:15,166 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 801 [2020-07-20 16:50:15,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:50:15,181 INFO L225 Difference]: With dead ends: 1259 [2020-07-20 16:50:15,181 INFO L226 Difference]: Without dead ends: 745 [2020-07-20 16:50:15,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1635 GetRequests, 1543 SyntacticMatches, 25 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=684, Invalid=4008, Unknown=0, NotChecked=0, Total=4692 [2020-07-20 16:50:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2020-07-20 16:50:15,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 646. [2020-07-20 16:50:15,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2020-07-20 16:50:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1499 transitions. [2020-07-20 16:50:15,241 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1499 transitions. Word has length 801 [2020-07-20 16:50:15,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:50:15,242 INFO L479 AbstractCegarLoop]: Abstraction has 646 states and 1499 transitions. [2020-07-20 16:50:15,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 16:50:15,242 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1499 transitions. [2020-07-20 16:50:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2020-07-20 16:50:15,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:50:15,253 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 23, 23, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 19, 18, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:50:15,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:50:15,454 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:50:15,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:50:15,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1308304268, now seen corresponding path program 32 times [2020-07-20 16:50:15,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:50:15,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697946249] [2020-07-20 16:50:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:50:16,184 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:50:16,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:50:16,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 16:50:16,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:50:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8830 backedges. 1350 proven. 1013 refuted. 0 times theorem prover too weak. 6467 trivial. 0 not checked. [2020-07-20 16:50:16,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:50:21,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:21,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:21,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:22,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:22,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:22,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:22,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:22,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:25,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:25,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:26,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:26,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:26,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:26,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:26,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:27,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:27,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8830 backedges. 1350 proven. 1043 refuted. 0 times theorem prover too weak. 6437 trivial. 0 not checked. [2020-07-20 16:50:27,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697946249] [2020-07-20 16:50:27,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:50:27,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 31 [2020-07-20 16:50:27,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137610460] [2020-07-20 16:50:28,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 16:50:28,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:50:28,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 16:50:28,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2020-07-20 16:50:28,001 INFO L87 Difference]: Start difference. First operand 646 states and 1499 transitions. Second operand 31 states. [2020-07-20 16:50:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:50:29,804 INFO L93 Difference]: Finished difference Result 1305 states and 3056 transitions. [2020-07-20 16:50:29,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 16:50:29,806 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 551 [2020-07-20 16:50:29,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:50:29,823 INFO L225 Difference]: With dead ends: 1305 [2020-07-20 16:50:29,823 INFO L226 Difference]: Without dead ends: 661 [2020-07-20 16:50:29,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1120 GetRequests, 1047 SyntacticMatches, 25 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=377, Invalid=2073, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 16:50:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-07-20 16:50:29,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 616. [2020-07-20 16:50:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2020-07-20 16:50:29,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1302 transitions. [2020-07-20 16:50:29,909 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1302 transitions. Word has length 551 [2020-07-20 16:50:29,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:50:29,912 INFO L479 AbstractCegarLoop]: Abstraction has 616 states and 1302 transitions. [2020-07-20 16:50:29,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 16:50:29,913 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1302 transitions. [2020-07-20 16:50:29,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2020-07-20 16:50:29,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:50:29,932 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 34, 33, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 16, 16, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:50:30,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:50:30,148 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:50:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:50:30,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1648548130, now seen corresponding path program 33 times [2020-07-20 16:50:30,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:50:30,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216342296] [2020-07-20 16:50:30,150 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:50:30,964 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:50:30,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:50:30,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 16:50:30,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:50:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12997 backedges. 1084 proven. 2121 refuted. 0 times theorem prover too weak. 9792 trivial. 0 not checked. [2020-07-20 16:50:31,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:50:38,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:38,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:39,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:39,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:39,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:40,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:40,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:40,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:40,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:41,001 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:50:44,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:45,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:46,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:47,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:47,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:47,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:47,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:47,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:47,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:50:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12997 backedges. 1088 proven. 2157 refuted. 0 times theorem prover too weak. 9752 trivial. 0 not checked. [2020-07-20 16:50:48,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216342296] [2020-07-20 16:50:48,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:50:48,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 33 [2020-07-20 16:50:48,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061194199] [2020-07-20 16:50:48,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 16:50:48,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:50:48,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 16:50:48,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 16:50:48,070 INFO L87 Difference]: Start difference. First operand 616 states and 1302 transitions. Second operand 33 states. [2020-07-20 16:50:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:50:54,153 INFO L93 Difference]: Finished difference Result 1549 states and 3597 transitions. [2020-07-20 16:50:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 16:50:54,158 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 668 [2020-07-20 16:50:54,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:50:54,176 INFO L225 Difference]: With dead ends: 1549 [2020-07-20 16:50:54,177 INFO L226 Difference]: Without dead ends: 875 [2020-07-20 16:50:54,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1365 GetRequests, 1277 SyntacticMatches, 27 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=595, Invalid=3311, Unknown=0, NotChecked=0, Total=3906 [2020-07-20 16:50:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2020-07-20 16:50:54,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 748. [2020-07-20 16:50:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2020-07-20 16:50:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1663 transitions. [2020-07-20 16:50:54,269 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1663 transitions. Word has length 668 [2020-07-20 16:50:54,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:50:54,270 INFO L479 AbstractCegarLoop]: Abstraction has 748 states and 1663 transitions. [2020-07-20 16:50:54,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 16:50:54,270 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1663 transitions. [2020-07-20 16:50:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2020-07-20 16:50:54,280 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:50:54,280 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 37, 37, 27, 27, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 13, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:50:54,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:50:54,481 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:50:54,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:50:54,482 INFO L82 PathProgramCache]: Analyzing trace with hash 466640857, now seen corresponding path program 34 times [2020-07-20 16:50:54,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:50:54,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474897559] [2020-07-20 16:50:54,483 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:50:55,244 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:50:55,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:50:55,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 16:50:55,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:50:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7858 backedges. 211 proven. 1288 refuted. 0 times theorem prover too weak. 6359 trivial. 0 not checked. [2020-07-20 16:50:55,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:50:58,174 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 16:51:02,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:02,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:02,904 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 16:51:04,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:05,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:05,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:06,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:06,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:06,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:07,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:07,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:07,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:07,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7858 backedges. 211 proven. 1321 refuted. 0 times theorem prover too weak. 6326 trivial. 0 not checked. [2020-07-20 16:51:07,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474897559] [2020-07-20 16:51:07,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:51:07,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-20 16:51:07,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475977163] [2020-07-20 16:51:07,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 16:51:07,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:51:07,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 16:51:07,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-20 16:51:07,663 INFO L87 Difference]: Start difference. First operand 748 states and 1663 transitions. Second operand 22 states. [2020-07-20 16:51:08,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:51:08,737 INFO L93 Difference]: Finished difference Result 755 states and 1676 transitions. [2020-07-20 16:51:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 16:51:08,740 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 523 [2020-07-20 16:51:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:51:08,754 INFO L225 Difference]: With dead ends: 755 [2020-07-20 16:51:08,755 INFO L226 Difference]: Without dead ends: 751 [2020-07-20 16:51:08,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 1009 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-20 16:51:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2020-07-20 16:51:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 748. [2020-07-20 16:51:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2020-07-20 16:51:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1663 transitions. [2020-07-20 16:51:08,810 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1663 transitions. Word has length 523 [2020-07-20 16:51:08,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:51:08,811 INFO L479 AbstractCegarLoop]: Abstraction has 748 states and 1663 transitions. [2020-07-20 16:51:08,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 16:51:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1663 transitions. [2020-07-20 16:51:08,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2020-07-20 16:51:08,825 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:51:08,825 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 42, 42, 27, 27, 23, 23, 23, 23, 23, 23, 23, 21, 21, 21, 21, 21, 21, 21, 20, 15, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:51:09,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:51:09,027 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:51:09,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:51:09,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1180523365, now seen corresponding path program 35 times [2020-07-20 16:51:09,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:51:09,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336490684] [2020-07-20 16:51:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:51:09,870 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:51:09,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:51:09,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 16:51:09,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:51:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 283 proven. 1240 refuted. 0 times theorem prover too weak. 8799 trivial. 0 not checked. [2020-07-20 16:51:10,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:51:16,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:16,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:18,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:19,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:19,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:19,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:19,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:19,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:19,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:19,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:19,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:19,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 283 proven. 1264 refuted. 0 times theorem prover too weak. 8775 trivial. 0 not checked. [2020-07-20 16:51:20,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336490684] [2020-07-20 16:51:20,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:51:20,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 16:51:20,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761019349] [2020-07-20 16:51:20,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 16:51:20,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:51:20,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 16:51:20,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:51:20,140 INFO L87 Difference]: Start difference. First operand 748 states and 1663 transitions. Second operand 20 states. [2020-07-20 16:51:20,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:51:20,691 INFO L93 Difference]: Finished difference Result 853 states and 1932 transitions. [2020-07-20 16:51:20,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 16:51:20,693 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 595 [2020-07-20 16:51:20,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:51:20,706 INFO L225 Difference]: With dead ends: 853 [2020-07-20 16:51:20,706 INFO L226 Difference]: Without dead ends: 849 [2020-07-20 16:51:20,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1196 GetRequests, 1157 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 16:51:20,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2020-07-20 16:51:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 830. [2020-07-20 16:51:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2020-07-20 16:51:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1888 transitions. [2020-07-20 16:51:20,754 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1888 transitions. Word has length 595 [2020-07-20 16:51:20,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:51:20,755 INFO L479 AbstractCegarLoop]: Abstraction has 830 states and 1888 transitions. [2020-07-20 16:51:20,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 16:51:20,755 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1888 transitions. [2020-07-20 16:51:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2020-07-20 16:51:20,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:51:20,764 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 48, 48, 34, 33, 26, 26, 26, 26, 26, 26, 26, 24, 24, 24, 24, 24, 24, 24, 20, 14, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:51:20,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:51:20,966 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:51:20,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:51:20,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1110177725, now seen corresponding path program 36 times [2020-07-20 16:51:20,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:51:20,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560454404] [2020-07-20 16:51:20,968 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:51:21,820 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:51:21,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:51:21,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 16:51:21,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:51:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13517 backedges. 1189 proven. 1864 refuted. 0 times theorem prover too weak. 10464 trivial. 0 not checked. [2020-07-20 16:51:22,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:51:29,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:29,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:31,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:32,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:32,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:32,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:32,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:32,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:33,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:37,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:37,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:38,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:38,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:38,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:39,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:39,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:39,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:39,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:39,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 13517 backedges. 1193 proven. 1892 refuted. 0 times theorem prover too weak. 10432 trivial. 0 not checked. [2020-07-20 16:51:40,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560454404] [2020-07-20 16:51:40,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:51:40,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 31 [2020-07-20 16:51:40,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923523508] [2020-07-20 16:51:40,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 16:51:40,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:51:40,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 16:51:40,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2020-07-20 16:51:40,177 INFO L87 Difference]: Start difference. First operand 830 states and 1888 transitions. Second operand 31 states. [2020-07-20 16:51:46,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:51:46,146 INFO L93 Difference]: Finished difference Result 2023 states and 4976 transitions. [2020-07-20 16:51:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-20 16:51:46,151 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 680 [2020-07-20 16:51:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:51:46,171 INFO L225 Difference]: With dead ends: 2023 [2020-07-20 16:51:46,171 INFO L226 Difference]: Without dead ends: 1157 [2020-07-20 16:51:46,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1387 GetRequests, 1305 SyntacticMatches, 25 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=532, Invalid=2890, Unknown=0, NotChecked=0, Total=3422 [2020-07-20 16:51:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2020-07-20 16:51:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 984. [2020-07-20 16:51:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-07-20 16:51:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 2320 transitions. [2020-07-20 16:51:46,281 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 2320 transitions. Word has length 680 [2020-07-20 16:51:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:51:46,282 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 2320 transitions. [2020-07-20 16:51:46,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 16:51:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 2320 transitions. [2020-07-20 16:51:46,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2020-07-20 16:51:46,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:51:46,297 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 40, 40, 27, 27, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 16, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:51:46,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:51:46,499 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:51:46,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:51:46,500 INFO L82 PathProgramCache]: Analyzing trace with hash 798117618, now seen corresponding path program 37 times [2020-07-20 16:51:46,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:51:46,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550119883] [2020-07-20 16:51:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:51:47,386 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:51:47,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:51:47,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 16:51:47,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:51:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9034 backedges. 311 proven. 1110 refuted. 0 times theorem prover too weak. 7613 trivial. 0 not checked. [2020-07-20 16:51:47,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:51:53,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:54,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:54,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:55,188 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 16:51:55,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:55,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:56,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:56,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:56,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:56,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:56,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:56,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:56,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:51:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9034 backedges. 311 proven. 1134 refuted. 0 times theorem prover too weak. 7589 trivial. 0 not checked. [2020-07-20 16:51:57,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550119883] [2020-07-20 16:51:57,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:51:57,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 16:51:57,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938509587] [2020-07-20 16:51:57,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 16:51:57,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:51:57,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 16:51:57,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:51:57,311 INFO L87 Difference]: Start difference. First operand 984 states and 2320 transitions. Second operand 20 states. [2020-07-20 16:51:58,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:51:58,394 INFO L93 Difference]: Finished difference Result 1025 states and 2424 transitions. [2020-07-20 16:51:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 16:51:58,400 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 559 [2020-07-20 16:51:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:51:58,423 INFO L225 Difference]: With dead ends: 1025 [2020-07-20 16:51:58,424 INFO L226 Difference]: Without dead ends: 1021 [2020-07-20 16:51:58,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1124 GetRequests, 1085 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 16:51:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2020-07-20 16:51:58,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 985. [2020-07-20 16:51:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-07-20 16:51:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 2322 transitions. [2020-07-20 16:51:58,512 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 2322 transitions. Word has length 559 [2020-07-20 16:51:58,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:51:58,513 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 2322 transitions. [2020-07-20 16:51:58,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 16:51:58,513 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 2322 transitions. [2020-07-20 16:51:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2020-07-20 16:51:58,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:51:58,529 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 52, 52, 34, 33, 27, 27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 22, 18, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:51:58,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:51:58,731 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:51:58,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:51:58,732 INFO L82 PathProgramCache]: Analyzing trace with hash -267028242, now seen corresponding path program 38 times [2020-07-20 16:51:58,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:51:58,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892232598] [2020-07-20 16:51:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:51:59,641 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:51:59,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:51:59,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 16:51:59,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:52:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15037 backedges. 1489 proven. 1738 refuted. 0 times theorem prover too weak. 11810 trivial. 0 not checked. [2020-07-20 16:52:00,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:52:09,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:10,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:10,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:11,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:12,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:12,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:12,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:12,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:12,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:17,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:17,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:18,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:18,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:19,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:19,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:20,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15037 backedges. 1495 proven. 1764 refuted. 0 times theorem prover too weak. 11778 trivial. 0 not checked. [2020-07-20 16:52:21,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892232598] [2020-07-20 16:52:21,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:52:21,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 31 [2020-07-20 16:52:21,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434871906] [2020-07-20 16:52:21,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 16:52:21,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:52:21,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 16:52:21,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2020-07-20 16:52:21,589 INFO L87 Difference]: Start difference. First operand 985 states and 2322 transitions. Second operand 31 states. [2020-07-20 16:52:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:52:26,308 INFO L93 Difference]: Finished difference Result 2296 states and 5524 transitions. [2020-07-20 16:52:26,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 16:52:26,310 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 716 [2020-07-20 16:52:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:52:26,334 INFO L225 Difference]: With dead ends: 2296 [2020-07-20 16:52:26,335 INFO L226 Difference]: Without dead ends: 1236 [2020-07-20 16:52:26,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1460 GetRequests, 1377 SyntacticMatches, 25 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=542, Invalid=2998, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 16:52:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2020-07-20 16:52:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 975. [2020-07-20 16:52:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 975 states. [2020-07-20 16:52:26,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2275 transitions. [2020-07-20 16:52:26,421 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2275 transitions. Word has length 716 [2020-07-20 16:52:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:52:26,421 INFO L479 AbstractCegarLoop]: Abstraction has 975 states and 2275 transitions. [2020-07-20 16:52:26,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 16:52:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2275 transitions. [2020-07-20 16:52:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2020-07-20 16:52:26,431 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:52:26,431 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 41, 41, 27, 27, 24, 24, 24, 24, 24, 24, 24, 21, 20, 20, 20, 20, 20, 20, 20, 14, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:52:26,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:52:26,632 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:52:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:52:26,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1858621045, now seen corresponding path program 39 times [2020-07-20 16:52:26,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:52:26,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484454003] [2020-07-20 16:52:26,634 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:52:27,595 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:52:27,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:52:27,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:52:27,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:52:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10358 backedges. 362 proven. 949 refuted. 0 times theorem prover too weak. 9047 trivial. 0 not checked. [2020-07-20 16:52:28,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:52:34,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:34,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:37,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:37,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:38,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:38,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:38,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:39,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:39,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:39,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10358 backedges. 362 proven. 965 refuted. 0 times theorem prover too weak. 9031 trivial. 0 not checked. [2020-07-20 16:52:40,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484454003] [2020-07-20 16:52:40,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:52:40,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 16:52:40,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894366378] [2020-07-20 16:52:40,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 16:52:40,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:52:40,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 16:52:40,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:52:40,358 INFO L87 Difference]: Start difference. First operand 975 states and 2275 transitions. Second operand 18 states. [2020-07-20 16:52:41,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:52:41,345 INFO L93 Difference]: Finished difference Result 1213 states and 3205 transitions. [2020-07-20 16:52:41,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:52:41,349 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 595 [2020-07-20 16:52:41,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:52:41,383 INFO L225 Difference]: With dead ends: 1213 [2020-07-20 16:52:41,383 INFO L226 Difference]: Without dead ends: 1209 [2020-07-20 16:52:41,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1195 GetRequests, 1161 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 16:52:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2020-07-20 16:52:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 993. [2020-07-20 16:52:41,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 993 states. [2020-07-20 16:52:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 2369 transitions. [2020-07-20 16:52:41,499 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 2369 transitions. Word has length 595 [2020-07-20 16:52:41,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:52:41,500 INFO L479 AbstractCegarLoop]: Abstraction has 993 states and 2369 transitions. [2020-07-20 16:52:41,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 16:52:41,500 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 2369 transitions. [2020-07-20 16:52:41,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2020-07-20 16:52:41,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:52:41,522 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 40, 40, 27, 27, 22, 22, 22, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 18, 13, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:52:41,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:52:41,724 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:52:41,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:52:41,725 INFO L82 PathProgramCache]: Analyzing trace with hash -646012533, now seen corresponding path program 40 times [2020-07-20 16:52:41,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:52:41,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677108310] [2020-07-20 16:52:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:52:42,687 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:52:42,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:52:42,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 16:52:42,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:52:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9466 backedges. 373 proven. 1084 refuted. 0 times theorem prover too weak. 8009 trivial. 0 not checked. [2020-07-20 16:52:43,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:52:45,782 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 16:52:45,891 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 16:52:46,009 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:52:46,123 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:52:46,234 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 16:52:51,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:54,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:54,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:55,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:56,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:56,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:56,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:56,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:56,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:57,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:52:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9466 backedges. 375 proven. 1106 refuted. 0 times theorem prover too weak. 7985 trivial. 0 not checked. [2020-07-20 16:52:58,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677108310] [2020-07-20 16:52:58,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:52:58,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 16:52:58,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095095551] [2020-07-20 16:52:58,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 16:52:58,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:52:58,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 16:52:58,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:52:58,183 INFO L87 Difference]: Start difference. First operand 993 states and 2369 transitions. Second operand 20 states. [2020-07-20 16:52:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:52:59,472 INFO L93 Difference]: Finished difference Result 1239 states and 3436 transitions. [2020-07-20 16:52:59,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 16:52:59,480 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 571 [2020-07-20 16:52:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:52:59,514 INFO L225 Difference]: With dead ends: 1239 [2020-07-20 16:52:59,515 INFO L226 Difference]: Without dead ends: 1235 [2020-07-20 16:52:59,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1148 GetRequests, 1109 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 16:52:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2020-07-20 16:52:59,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 988. [2020-07-20 16:52:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2020-07-20 16:52:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 2349 transitions. [2020-07-20 16:52:59,652 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 2349 transitions. Word has length 571 [2020-07-20 16:52:59,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:52:59,653 INFO L479 AbstractCegarLoop]: Abstraction has 988 states and 2349 transitions. [2020-07-20 16:52:59,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 16:52:59,653 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 2349 transitions. [2020-07-20 16:52:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2020-07-20 16:52:59,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:52:59,677 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 40, 40, 27, 27, 24, 24, 24, 24, 24, 24, 24, 22, 20, 20, 20, 20, 20, 20, 20, 13, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:52:59,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:52:59,890 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:52:59,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:52:59,891 INFO L82 PathProgramCache]: Analyzing trace with hash -31035523, now seen corresponding path program 41 times [2020-07-20 16:52:59,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:52:59,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641909849] [2020-07-20 16:52:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:53:01,001 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:53:01,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:53:01,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 16:53:01,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:53:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10390 backedges. 523 proven. 1006 refuted. 0 times theorem prover too weak. 8861 trivial. 0 not checked. [2020-07-20 16:53:01,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:53:04,155 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 16:53:04,267 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 16:53:04,386 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:53:04,505 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:53:04,615 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 16:53:09,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:09,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:12,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:12,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:13,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:13,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:14,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:14,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:14,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:15,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10390 backedges. 525 proven. 1028 refuted. 0 times theorem prover too weak. 8837 trivial. 0 not checked. [2020-07-20 16:53:17,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641909849] [2020-07-20 16:53:17,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:53:17,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 16:53:17,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103664722] [2020-07-20 16:53:17,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 16:53:17,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:53:17,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 16:53:17,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:53:17,084 INFO L87 Difference]: Start difference. First operand 988 states and 2349 transitions. Second operand 20 states. [2020-07-20 16:53:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:53:18,326 INFO L93 Difference]: Finished difference Result 1038 states and 2490 transitions. [2020-07-20 16:53:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 16:53:18,332 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 595 [2020-07-20 16:53:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:53:18,357 INFO L225 Difference]: With dead ends: 1038 [2020-07-20 16:53:18,357 INFO L226 Difference]: Without dead ends: 1034 [2020-07-20 16:53:18,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1196 GetRequests, 1157 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 16:53:18,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2020-07-20 16:53:18,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 978. [2020-07-20 16:53:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-07-20 16:53:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2316 transitions. [2020-07-20 16:53:18,445 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2316 transitions. Word has length 595 [2020-07-20 16:53:18,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:53:18,446 INFO L479 AbstractCegarLoop]: Abstraction has 978 states and 2316 transitions. [2020-07-20 16:53:18,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 16:53:18,446 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2316 transitions. [2020-07-20 16:53:18,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2020-07-20 16:53:18,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:53:18,462 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 43, 43, 27, 27, 26, 26, 26, 26, 26, 26, 26, 25, 21, 21, 21, 21, 21, 21, 21, 16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:53:18,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:53:18,663 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:53:18,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:53:18,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1716325252, now seen corresponding path program 42 times [2020-07-20 16:53:18,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:53:18,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733663478] [2020-07-20 16:53:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:53:19,723 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:53:19,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:53:19,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:53:19,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:53:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11758 backedges. 508 proven. 889 refuted. 0 times theorem prover too weak. 10361 trivial. 0 not checked. [2020-07-20 16:53:20,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:53:28,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:29,381 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 16:53:30,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:30,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:31,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:31,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:31,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:31,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:32,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:32,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:33,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11758 backedges. 510 proven. 903 refuted. 0 times theorem prover too weak. 10345 trivial. 0 not checked. [2020-07-20 16:53:34,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733663478] [2020-07-20 16:53:34,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:53:34,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 16:53:34,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987332234] [2020-07-20 16:53:34,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 16:53:34,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:53:34,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 16:53:34,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:53:34,349 INFO L87 Difference]: Start difference. First operand 978 states and 2316 transitions. Second operand 18 states. [2020-07-20 16:53:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:53:35,170 INFO L93 Difference]: Finished difference Result 1154 states and 3102 transitions. [2020-07-20 16:53:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:53:35,176 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 631 [2020-07-20 16:53:35,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:53:35,202 INFO L225 Difference]: With dead ends: 1154 [2020-07-20 16:53:35,203 INFO L226 Difference]: Without dead ends: 1150 [2020-07-20 16:53:35,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1267 GetRequests, 1233 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 16:53:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2020-07-20 16:53:35,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 978. [2020-07-20 16:53:35,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-07-20 16:53:35,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2316 transitions. [2020-07-20 16:53:35,319 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2316 transitions. Word has length 631 [2020-07-20 16:53:35,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:53:35,320 INFO L479 AbstractCegarLoop]: Abstraction has 978 states and 2316 transitions. [2020-07-20 16:53:35,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 16:53:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2316 transitions. [2020-07-20 16:53:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2020-07-20 16:53:35,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:53:35,336 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 41, 41, 27, 27, 25, 25, 25, 25, 25, 25, 25, 23, 20, 20, 20, 20, 20, 20, 20, 14, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:53:35,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:53:35,550 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:53:35,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:53:35,552 INFO L82 PathProgramCache]: Analyzing trace with hash 686126676, now seen corresponding path program 43 times [2020-07-20 16:53:35,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:53:35,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414660303] [2020-07-20 16:53:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:53:36,605 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:53:36,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:53:36,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:53:36,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:53:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10842 backedges. 478 proven. 861 refuted. 0 times theorem prover too weak. 9503 trivial. 0 not checked. [2020-07-20 16:53:37,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:53:37,433 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 16:53:44,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:46,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:47,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:47,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:48,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:48,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:48,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:53:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10842 backedges. 478 proven. 879 refuted. 0 times theorem prover too weak. 9485 trivial. 0 not checked. [2020-07-20 16:53:49,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414660303] [2020-07-20 16:53:49,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:53:49,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 16:53:49,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507049719] [2020-07-20 16:53:49,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 16:53:49,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:53:49,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 16:53:49,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:53:49,752 INFO L87 Difference]: Start difference. First operand 978 states and 2316 transitions. Second operand 18 states. [2020-07-20 16:53:50,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:53:50,290 INFO L93 Difference]: Finished difference Result 1169 states and 3129 transitions. [2020-07-20 16:53:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:53:50,293 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 607 [2020-07-20 16:53:50,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:53:50,313 INFO L225 Difference]: With dead ends: 1169 [2020-07-20 16:53:50,314 INFO L226 Difference]: Without dead ends: 1165 [2020-07-20 16:53:50,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1219 GetRequests, 1185 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 16:53:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-07-20 16:53:50,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 978. [2020-07-20 16:53:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-07-20 16:53:50,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2316 transitions. [2020-07-20 16:53:50,446 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2316 transitions. Word has length 607 [2020-07-20 16:53:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:53:50,447 INFO L479 AbstractCegarLoop]: Abstraction has 978 states and 2316 transitions. [2020-07-20 16:53:50,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 16:53:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2316 transitions. [2020-07-20 16:53:50,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2020-07-20 16:53:50,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:53:50,465 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 45, 45, 27, 27, 25, 25, 25, 25, 25, 25, 25, 23, 22, 22, 22, 22, 22, 22, 22, 18, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:53:50,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:53:50,678 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:53:50,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:53:50,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1845636410, now seen corresponding path program 44 times [2020-07-20 16:53:50,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:53:50,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543624164] [2020-07-20 16:53:50,680 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:53:51,722 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:53:51,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:53:51,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:53:51,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:53:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11686 backedges. 710 proven. 681 refuted. 0 times theorem prover too weak. 10295 trivial. 0 not checked. [2020-07-20 16:53:52,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:53:55,270 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:53:55,380 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:54:00,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:01,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:01,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:02,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:02,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:03,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:03,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:03,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:03,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:03,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:05,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11686 backedges. 710 proven. 699 refuted. 0 times theorem prover too weak. 10277 trivial. 0 not checked. [2020-07-20 16:54:08,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543624164] [2020-07-20 16:54:08,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:54:08,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 16:54:08,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495489169] [2020-07-20 16:54:08,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 16:54:08,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:54:08,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 16:54:08,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:54:08,245 INFO L87 Difference]: Start difference. First operand 978 states and 2316 transitions. Second operand 18 states. [2020-07-20 16:54:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:54:09,407 INFO L93 Difference]: Finished difference Result 991 states and 2344 transitions. [2020-07-20 16:54:09,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:54:09,413 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 631 [2020-07-20 16:54:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:54:09,432 INFO L225 Difference]: With dead ends: 991 [2020-07-20 16:54:09,432 INFO L226 Difference]: Without dead ends: 987 [2020-07-20 16:54:09,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1267 GetRequests, 1233 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 16:54:09,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2020-07-20 16:54:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 973. [2020-07-20 16:54:09,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2020-07-20 16:54:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 2303 transitions. [2020-07-20 16:54:09,516 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 2303 transitions. Word has length 631 [2020-07-20 16:54:09,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:54:09,517 INFO L479 AbstractCegarLoop]: Abstraction has 973 states and 2303 transitions. [2020-07-20 16:54:09,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 16:54:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 2303 transitions. [2020-07-20 16:54:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1396 [2020-07-20 16:54:09,543 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:54:09,543 INFO L422 BasicCegarLoop]: trace histogram [114, 114, 97, 97, 61, 61, 57, 57, 57, 57, 57, 57, 57, 53, 48, 48, 48, 48, 48, 48, 48, 36, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:54:09,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:54:09,745 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:54:09,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:54:09,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1927440814, now seen corresponding path program 45 times [2020-07-20 16:54:09,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:54:09,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198468771] [2020-07-20 16:54:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:54:10,980 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 16:54:10,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:54:10,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 16:54:11,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:54:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 58944 backedges. 30307 proven. 2064 refuted. 0 times theorem prover too weak. 26573 trivial. 0 not checked. [2020-07-20 16:54:12,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:54:14,666 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:54:15,152 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:54:15,274 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:54:15,394 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:54:15,501 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:54:17,585 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 16:54:17,701 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 16:54:17,815 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 16:54:37,430 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 16:54:37,780 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 16:54:37,895 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 16:54:38,009 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 16:54:38,116 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 16:54:41,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:41,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:43,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:43,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:44,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:44,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:45,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:45,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:45,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:46,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:47,802 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 16:54:48,019 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:54:48,137 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:54:48,537 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:54:48,642 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:54:48,755 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:54:48,869 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:54:48,986 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 16:54:52,240 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 16:54:52,344 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 16:54:52,449 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:54:52,665 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:54:53,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:53,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:54,878 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 16:54:55,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:55,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:56,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:56,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:57,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:57,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:57,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:57,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:58,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:58,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:54:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 58944 backedges. 1229 proven. 6255 refuted. 0 times theorem prover too weak. 51460 trivial. 0 not checked. [2020-07-20 16:54:59,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198468771] [2020-07-20 16:54:59,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:54:59,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 35 [2020-07-20 16:54:59,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705949669] [2020-07-20 16:54:59,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 16:54:59,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:54:59,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 16:54:59,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 16:54:59,545 INFO L87 Difference]: Start difference. First operand 973 states and 2303 transitions. Second operand 35 states. [2020-07-20 16:55:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:55:06,553 INFO L93 Difference]: Finished difference Result 2036 states and 5082 transitions. [2020-07-20 16:55:06,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 16:55:06,559 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 1395 [2020-07-20 16:55:06,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:55:06,583 INFO L225 Difference]: With dead ends: 2036 [2020-07-20 16:55:06,583 INFO L226 Difference]: Without dead ends: 1065 [2020-07-20 16:55:06,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2814 GetRequests, 2731 SyntacticMatches, 25 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=520, Invalid=3020, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 16:55:06,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2020-07-20 16:55:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 892. [2020-07-20 16:55:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2020-07-20 16:55:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2035 transitions. [2020-07-20 16:55:06,763 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2035 transitions. Word has length 1395 [2020-07-20 16:55:06,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:55:06,765 INFO L479 AbstractCegarLoop]: Abstraction has 892 states and 2035 transitions. [2020-07-20 16:55:06,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 16:55:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2035 transitions. [2020-07-20 16:55:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2020-07-20 16:55:06,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:55:06,786 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 49, 49, 31, 31, 27, 27, 27, 27, 27, 27, 27, 24, 24, 24, 24, 24, 24, 24, 23, 18, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:55:07,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:55:07,003 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:55:07,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:55:07,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1919068366, now seen corresponding path program 46 times [2020-07-20 16:55:07,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:55:07,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975964762] [2020-07-20 16:55:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:55:08,257 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:55:08,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:55:08,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1012 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 16:55:08,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:55:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13866 backedges. 6982 proven. 1277 refuted. 0 times theorem prover too weak. 5607 trivial. 0 not checked. [2020-07-20 16:55:09,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:55:11,122 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 16:55:11,241 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:55:11,356 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:55:11,819 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:55:11,940 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:55:12,073 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:55:12,201 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:55:13,459 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:55:14,074 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 16:55:14,187 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 16:55:14,311 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 16:55:14,430 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 16:55:19,747 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 16:55:20,337 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:55:20,876 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:55:21,001 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:55:21,140 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:55:21,280 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:55:23,162 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 16:55:24,732 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 16:55:25,058 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 16:55:25,175 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 16:55:25,296 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 16:55:25,417 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 16:55:25,538 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 16:55:27,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:28,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:28,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:29,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:30,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:30,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:30,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:32,545 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 16:55:32,951 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 16:55:33,060 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:55:33,173 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:55:33,622 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:55:33,743 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:55:33,886 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:55:34,018 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:55:34,131 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 16:55:34,235 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 16:55:36,959 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 16:55:37,485 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 16:55:37,594 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:55:37,705 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:55:38,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:38,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:40,072 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 16:55:40,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:40,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:41,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:41,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:42,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:42,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:43,144 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:55:43,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:43,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:55:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13866 backedges. 955 proven. 2503 refuted. 0 times theorem prover too weak. 10408 trivial. 0 not checked. [2020-07-20 16:55:44,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975964762] [2020-07-20 16:55:44,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:55:44,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 33 [2020-07-20 16:55:44,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940506108] [2020-07-20 16:55:44,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 16:55:44,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:55:44,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 16:55:44,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 16:55:44,188 INFO L87 Difference]: Start difference. First operand 892 states and 2035 transitions. Second operand 33 states. [2020-07-20 16:55:51,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:55:51,485 INFO L93 Difference]: Finished difference Result 1837 states and 4221 transitions. [2020-07-20 16:55:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 16:55:51,491 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 687 [2020-07-20 16:55:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:55:51,512 INFO L225 Difference]: With dead ends: 1837 [2020-07-20 16:55:51,513 INFO L226 Difference]: Without dead ends: 950 [2020-07-20 16:55:51,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1403 GetRequests, 1315 SyntacticMatches, 27 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=595, Invalid=3311, Unknown=0, NotChecked=0, Total=3906 [2020-07-20 16:55:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2020-07-20 16:55:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 814. [2020-07-20 16:55:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2020-07-20 16:55:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1788 transitions. [2020-07-20 16:55:51,663 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1788 transitions. Word has length 687 [2020-07-20 16:55:51,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:55:51,664 INFO L479 AbstractCegarLoop]: Abstraction has 814 states and 1788 transitions. [2020-07-20 16:55:51,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 16:55:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1788 transitions. [2020-07-20 16:55:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2020-07-20 16:55:51,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:55:51,681 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 27, 27, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 19, 18, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:55:51,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:55:51,895 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:55:51,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:55:51,896 INFO L82 PathProgramCache]: Analyzing trace with hash -847147464, now seen corresponding path program 47 times [2020-07-20 16:55:51,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:55:51,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744488512] [2020-07-20 16:55:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:55:53,099 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:55:53,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:55:53,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:55:53,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:55:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10738 backedges. 760 proven. 573 refuted. 0 times theorem prover too weak. 9405 trivial. 0 not checked. [2020-07-20 16:55:53,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:55:56,592 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 16:55:56,708 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:55:56,820 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:55:56,926 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:55:58,214 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 16:56:00,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:00,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:01,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:01,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:01,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:02,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:02,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:02,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:02,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:03,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10738 backedges. 764 proven. 585 refuted. 0 times theorem prover too weak. 9389 trivial. 0 not checked. [2020-07-20 16:56:07,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744488512] [2020-07-20 16:56:07,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:07,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 16:56:07,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477146022] [2020-07-20 16:56:07,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 16:56:07,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:07,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 16:56:07,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:56:07,664 INFO L87 Difference]: Start difference. First operand 814 states and 1788 transitions. Second operand 18 states. [2020-07-20 16:56:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:08,856 INFO L93 Difference]: Finished difference Result 826 states and 1819 transitions. [2020-07-20 16:56:08,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:56:08,864 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 607 [2020-07-20 16:56:08,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:08,881 INFO L225 Difference]: With dead ends: 826 [2020-07-20 16:56:08,882 INFO L226 Difference]: Without dead ends: 822 [2020-07-20 16:56:08,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1219 GetRequests, 1185 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 16:56:08,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2020-07-20 16:56:08,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 804. [2020-07-20 16:56:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 804 states. [2020-07-20 16:56:09,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1753 transitions. [2020-07-20 16:56:09,012 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1753 transitions. Word has length 607 [2020-07-20 16:56:09,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:09,014 INFO L479 AbstractCegarLoop]: Abstraction has 804 states and 1753 transitions. [2020-07-20 16:56:09,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 16:56:09,015 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1753 transitions. [2020-07-20 16:56:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1251 [2020-07-20 16:56:09,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:09,055 INFO L422 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 55, 54, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 41, 39, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:09,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:09,270 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:09,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:09,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1653035373, now seen corresponding path program 48 times [2020-07-20 16:56:09,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:09,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600270538] [2020-07-20 16:56:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:10,631 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:56:10,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:10,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 16:56:10,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 46908 backedges. 21675 proven. 2680 refuted. 0 times theorem prover too weak. 22553 trivial. 0 not checked. [2020-07-20 16:56:12,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:14,334 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:56:27,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:27,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:27,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:27,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:28,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:28,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:28,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:28,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:28,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:34,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:36,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:36,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:37,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:38,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:38,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:38,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:38,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:38,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:38,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 46908 backedges. 2297 proven. 4881 refuted. 0 times theorem prover too weak. 39730 trivial. 0 not checked. [2020-07-20 16:56:39,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600270538] [2020-07-20 16:56:39,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:39,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 31] total 35 [2020-07-20 16:56:39,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727243872] [2020-07-20 16:56:39,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 16:56:39,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:39,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 16:56:39,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 16:56:39,590 INFO L87 Difference]: Start difference. First operand 804 states and 1753 transitions. Second operand 35 states. [2020-07-20 16:56:43,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:43,834 INFO L93 Difference]: Finished difference Result 1708 states and 3956 transitions. [2020-07-20 16:56:43,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-20 16:56:43,836 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 1250 [2020-07-20 16:56:43,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:43,851 INFO L225 Difference]: With dead ends: 1708 [2020-07-20 16:56:43,851 INFO L226 Difference]: Without dead ends: 910 [2020-07-20 16:56:43,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2529 GetRequests, 2437 SyntacticMatches, 29 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=622, Invalid=3538, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 16:56:43,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2020-07-20 16:56:43,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 825. [2020-07-20 16:56:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 825 states. [2020-07-20 16:56:43,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1938 transitions. [2020-07-20 16:56:43,933 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1938 transitions. Word has length 1250 [2020-07-20 16:56:43,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:43,935 INFO L479 AbstractCegarLoop]: Abstraction has 825 states and 1938 transitions. [2020-07-20 16:56:43,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 16:56:43,935 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1938 transitions. [2020-07-20 16:56:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1106 [2020-07-20 16:56:43,960 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:43,960 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 81, 81, 48, 48, 43, 43, 43, 43, 43, 43, 43, 40, 40, 40, 40, 40, 40, 40, 38, 33, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:44,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:44,176 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:44,176 INFO L82 PathProgramCache]: Analyzing trace with hash -749993688, now seen corresponding path program 49 times [2020-07-20 16:56:44,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:44,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135102425] [2020-07-20 16:56:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:45,374 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:56:45,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:45,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 16:56:45,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 36568 backedges. 14528 proven. 2731 refuted. 0 times theorem prover too weak. 19309 trivial. 0 not checked. [2020-07-20 16:56:46,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:57,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:58,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:58,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:59,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:59,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:59,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:59,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:59,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:59,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:00,229 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:57:05,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:05,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:07,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:08,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:08,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:09,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:09,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:09,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:10,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:10,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 36568 backedges. 2414 proven. 4232 refuted. 0 times theorem prover too weak. 29922 trivial. 0 not checked. [2020-07-20 16:57:10,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135102425] [2020-07-20 16:57:10,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:57:10,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33] total 37 [2020-07-20 16:57:10,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353488589] [2020-07-20 16:57:10,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 16:57:10,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:57:10,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 16:57:10,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 16:57:10,796 INFO L87 Difference]: Start difference. First operand 825 states and 1938 transitions. Second operand 37 states. [2020-07-20 16:57:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:57:14,897 INFO L93 Difference]: Finished difference Result 1680 states and 3956 transitions. [2020-07-20 16:57:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-20 16:57:14,900 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 1105 [2020-07-20 16:57:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:57:14,911 INFO L225 Difference]: With dead ends: 1680 [2020-07-20 16:57:14,911 INFO L226 Difference]: Without dead ends: 861 [2020-07-20 16:57:14,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2240 GetRequests, 2143 SyntacticMatches, 31 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=665, Invalid=3891, Unknown=0, NotChecked=0, Total=4556 [2020-07-20 16:57:14,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2020-07-20 16:57:14,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 809. [2020-07-20 16:57:14,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2020-07-20 16:57:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1770 transitions. [2020-07-20 16:57:14,957 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1770 transitions. Word has length 1105 [2020-07-20 16:57:14,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:57:14,957 INFO L479 AbstractCegarLoop]: Abstraction has 809 states and 1770 transitions. [2020-07-20 16:57:14,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 16:57:14,957 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1770 transitions. [2020-07-20 16:57:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1010 [2020-07-20 16:57:14,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:57:14,966 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 73, 73, 48, 48, 39, 39, 39, 39, 39, 39, 39, 36, 36, 36, 36, 36, 36, 36, 30, 25, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:57:15,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:57:15,169 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:57:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:57:15,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1986590218, now seen corresponding path program 50 times [2020-07-20 16:57:15,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:57:15,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667412066] [2020-07-20 16:57:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:57:16,291 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 16:57:16,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:57:16,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 16:57:16,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:57:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 30264 backedges. 15730 proven. 965 refuted. 0 times theorem prover too weak. 13569 trivial. 0 not checked. [2020-07-20 16:57:17,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:57:30,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:30,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:31,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:31,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:31,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:32,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:32,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:34,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:34,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:34,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:35,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:35,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:35,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:35,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 30264 backedges. 1136 proven. 3687 refuted. 0 times theorem prover too weak. 25441 trivial. 0 not checked. [2020-07-20 16:57:36,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667412066] [2020-07-20 16:57:36,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:57:36,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 29 [2020-07-20 16:57:36,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480864871] [2020-07-20 16:57:36,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 16:57:36,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:57:36,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 16:57:36,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2020-07-20 16:57:36,055 INFO L87 Difference]: Start difference. First operand 809 states and 1770 transitions. Second operand 29 states. [2020-07-20 16:57:39,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:57:39,580 INFO L93 Difference]: Finished difference Result 1759 states and 3873 transitions. [2020-07-20 16:57:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 16:57:39,584 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 1009 [2020-07-20 16:57:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:57:39,596 INFO L225 Difference]: With dead ends: 1759 [2020-07-20 16:57:39,597 INFO L226 Difference]: Without dead ends: 939 [2020-07-20 16:57:39,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2043 GetRequests, 1967 SyntacticMatches, 23 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=465, Invalid=2505, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 16:57:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2020-07-20 16:57:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 806. [2020-07-20 16:57:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2020-07-20 16:57:39,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1680 transitions. [2020-07-20 16:57:39,673 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1680 transitions. Word has length 1009 [2020-07-20 16:57:39,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:57:39,673 INFO L479 AbstractCegarLoop]: Abstraction has 806 states and 1680 transitions. [2020-07-20 16:57:39,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 16:57:39,674 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1680 transitions. [2020-07-20 16:57:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2056 [2020-07-20 16:57:39,712 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:57:39,713 INFO L422 BasicCegarLoop]: trace histogram [172, 172, 135, 135, 103, 103, 86, 86, 86, 86, 86, 86, 86, 69, 67, 67, 67, 67, 67, 67, 67, 36, 32, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:57:39,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:57:39,924 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:57:39,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:57:39,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1137777278, now seen corresponding path program 51 times [2020-07-20 16:57:39,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:57:39,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301355808] [2020-07-20 16:57:39,927 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:57:41,232 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 16:57:41,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:57:41,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 16:57:41,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:57:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 128974 backedges. 44243 proven. 884 refuted. 0 times theorem prover too weak. 83847 trivial. 0 not checked. [2020-07-20 16:57:43,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:58:18,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:18,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:19,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:19,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:20,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:20,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:20,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:20,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:20,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:23,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:24,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:24,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:24,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:24,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:24,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:25,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 128974 backedges. 1495 proven. 8738 refuted. 0 times theorem prover too weak. 118741 trivial. 0 not checked. [2020-07-20 16:58:27,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301355808] [2020-07-20 16:58:27,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:58:27,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 29 [2020-07-20 16:58:27,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012168881] [2020-07-20 16:58:27,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 16:58:27,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:58:27,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 16:58:27,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2020-07-20 16:58:27,764 INFO L87 Difference]: Start difference. First operand 806 states and 1680 transitions. Second operand 29 states. [2020-07-20 16:58:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:58:32,609 INFO L93 Difference]: Finished difference Result 1673 states and 3421 transitions. [2020-07-20 16:58:32,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-20 16:58:32,613 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 2055 [2020-07-20 16:58:32,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:58:32,621 INFO L225 Difference]: With dead ends: 1673 [2020-07-20 16:58:32,622 INFO L226 Difference]: Without dead ends: 856 [2020-07-20 16:58:32,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4136 GetRequests, 4059 SyntacticMatches, 23 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=479, Invalid=2601, Unknown=0, NotChecked=0, Total=3080 [2020-07-20 16:58:32,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2020-07-20 16:58:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 612. [2020-07-20 16:58:32,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-07-20 16:58:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1092 transitions. [2020-07-20 16:58:32,663 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1092 transitions. Word has length 2055 [2020-07-20 16:58:32,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:58:32,664 INFO L479 AbstractCegarLoop]: Abstraction has 612 states and 1092 transitions. [2020-07-20 16:58:32,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 16:58:32,664 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1092 transitions. [2020-07-20 16:58:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2020-07-20 16:58:32,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:58:32,674 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 81, 81, 61, 61, 43, 43, 43, 43, 43, 43, 43, 40, 40, 40, 40, 40, 40, 40, 25, 21, 20, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:58:32,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:58:32,875 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:58:32,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:58:32,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1204374410, now seen corresponding path program 52 times [2020-07-20 16:58:32,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:58:32,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134240241] [2020-07-20 16:58:32,877 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:58:34,227 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:58:34,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:58:34,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1680 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 16:58:34,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:58:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 37972 backedges. 3108 proven. 4221 refuted. 0 times theorem prover too weak. 30643 trivial. 0 not checked. [2020-07-20 16:58:35,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:58:36,887 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 16:58:38,002 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:58:38,717 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:58:38,825 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:58:38,941 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 16:58:39,062 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 16:58:39,983 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 16:58:40,118 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 16:58:40,254 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 16:58:40,391 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 16:58:42,496 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:58:42,986 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:58:43,099 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:58:43,216 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 16:58:43,330 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 16:58:45,422 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:58:45,525 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:58:45,936 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:58:46,051 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:58:46,176 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 16:58:46,298 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 16:58:46,415 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 16:58:46,522 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 16:58:50,178 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:58:50,283 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:58:50,394 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:58:50,499 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:58:51,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:53,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:53,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:55,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:57,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:57,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:57,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:58,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:58:58,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:00,790 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:59:00,895 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 16:59:01,403 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:59:01,519 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:59:01,641 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:59:01,758 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:59:02,530 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:59:02,833 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 16:59:03,587 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 16:59:03,704 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 16:59:03,827 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 16:59:03,948 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 16:59:04,059 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 16:59:04,177 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 16:59:11,223 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 16:59:11,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:11,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:16,516 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:59:17,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:20,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:20,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:22,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:23,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:23,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:23,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:23,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:24,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:24,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:24,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:24,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:59:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 37972 backedges. 3108 proven. 4295 refuted. 0 times theorem prover too weak. 30569 trivial. 0 not checked. [2020-07-20 16:59:25,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134240241] [2020-07-20 16:59:25,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:59:25,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 37] total 41 [2020-07-20 16:59:25,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154178327] [2020-07-20 16:59:25,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-20 16:59:25,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:59:25,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-20 16:59:25,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 16:59:25,495 INFO L87 Difference]: Start difference. First operand 612 states and 1092 transitions. Second operand 41 states. [2020-07-20 16:59:35,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:59:35,146 INFO L93 Difference]: Finished difference Result 1285 states and 2484 transitions. [2020-07-20 16:59:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-20 16:59:35,151 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 1131 [2020-07-20 16:59:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:59:35,160 INFO L225 Difference]: With dead ends: 1285 [2020-07-20 16:59:35,160 INFO L226 Difference]: Without dead ends: 679 [2020-07-20 16:59:35,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2298 GetRequests, 2187 SyntacticMatches, 35 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=848, Invalid=5158, Unknown=0, NotChecked=0, Total=6006 [2020-07-20 16:59:35,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-07-20 16:59:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 627. [2020-07-20 16:59:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2020-07-20 16:59:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1127 transitions. [2020-07-20 16:59:35,224 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1127 transitions. Word has length 1131 [2020-07-20 16:59:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:59:35,225 INFO L479 AbstractCegarLoop]: Abstraction has 627 states and 1127 transitions. [2020-07-20 16:59:35,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-20 16:59:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1127 transitions. [2020-07-20 16:59:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1313 [2020-07-20 16:59:35,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:59:35,248 INFO L422 BasicCegarLoop]: trace histogram [99, 99, 96, 96, 68, 67, 49, 49, 49, 49, 49, 49, 49, 48, 48, 48, 48, 48, 48, 48, 31, 29, 20, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:59:35,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:59:35,463 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:59:35,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:59:35,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1017546240, now seen corresponding path program 53 times [2020-07-20 16:59:35,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:59:35,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181550477] [2020-07-20 16:59:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:59:36,995 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:59:36,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:59:37,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 2530 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 16:59:37,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:59:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 51349 backedges. 697 proven. 4371 refuted. 0 times theorem prover too weak. 46281 trivial. 0 not checked. [2020-07-20 16:59:38,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:59:40,495 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:59:40,611 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:59:40,728 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:59:41,517 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:59:41,636 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:59:41,764 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 16:59:41,887 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 16:59:42,982 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 16:59:43,112 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 16:59:43,252 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 16:59:43,396 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 16:59:44,848 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 16:59:44,993 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 16:59:45,146 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-20 16:59:45,302 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-20 16:59:45,449 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:59:45,592 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 16:59:45,733 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 16:59:45,860 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 16:59:45,976 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 16:59:46,094 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-20 16:59:46,197 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 16:59:56,653 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:59:56,759 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 16:59:56,878 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:59:56,994 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 16:59:57,811 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:59:57,941 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:59:58,079 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 16:59:58,220 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 16:59:59,442 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 16:59:59,584 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 16:59:59,733 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 16:59:59,881 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 17:00:00,033 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 17:00:00,164 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 17:00:00,288 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 17:00:00,401 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 17:00:00,515 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 17:00:00,620 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 17:00:00,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts