/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:12:08,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:12:08,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:12:08,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:12:08,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:12:08,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:12:08,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:12:08,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:12:08,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:12:08,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:12:08,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:12:08,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:12:08,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:12:08,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:12:08,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:12:08,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:12:08,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:12:08,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:12:08,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:12:08,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:12:08,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:12:08,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:12:08,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:12:08,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:12:08,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:12:08,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:12:08,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:12:08,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:12:08,992 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:12:09,022 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:12:09,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:12:09,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:12:09,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:12:09,026 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:12:09,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:12:09,026 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:12:09,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:12:09,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:12:09,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:12:09,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:12:09,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:12:09,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:12:09,029 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:12:09,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:12:09,029 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:12:09,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:12:09,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:12:09,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:12:09,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:12:09,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:12:09,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:12:09,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:12:09,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:12:09,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:12:09,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:12:09,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:09,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:12:09,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:12:09,033 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:12:09,436 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:12:09,449 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:12:09,452 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:12:09,454 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:12:09,454 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:12:09,455 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi01.c [2020-07-20 13:12:09,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90334e7d4/7c646e5da8e54c9a998a5451e2f0f03b/FLAG131f4d7ca [2020-07-20 13:12:10,014 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:12:10,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi01.c [2020-07-20 13:12:10,023 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90334e7d4/7c646e5da8e54c9a998a5451e2f0f03b/FLAG131f4d7ca [2020-07-20 13:12:10,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90334e7d4/7c646e5da8e54c9a998a5451e2f0f03b [2020-07-20 13:12:10,409 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:12:10,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:12:10,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:12:10,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:12:10,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:12:10,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:12:10" (1/1) ... [2020-07-20 13:12:10,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba4f459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:12:10, skipping insertion in model container [2020-07-20 13:12:10,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:12:10" (1/1) ... [2020-07-20 13:12:10,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:12:10,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:12:10,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:12:10,717 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:12:10,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:12:10,758 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:12:10,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:12:10 WrapperNode [2020-07-20 13:12:10,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:12:10,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:12:10,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:12:10,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:12:10,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:12:10" (1/1) ... [2020-07-20 13:12:10,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:12:10" (1/1) ... [2020-07-20 13:12:10,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:12:10" (1/1) ... [2020-07-20 13:12:10,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:12:10" (1/1) ... [2020-07-20 13:12:10,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:12:10" (1/1) ... [2020-07-20 13:12:10,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:12:10" (1/1) ... [2020-07-20 13:12:10,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:12:10" (1/1) ... [2020-07-20 13:12:10,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:12:10,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:12:10,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:12:10,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:12:10,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:12:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:12:10,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:12:10,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:12:10,989 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-20 13:12:10,989 INFO L138 BoogieDeclarations]: Found implementation of procedure applyHanoi [2020-07-20 13:12:10,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:12:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:12:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:12:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-20 13:12:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure applyHanoi [2020-07-20 13:12:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:12:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:12:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:12:11,226 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:12:11,227 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:12:11,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:12:11 BoogieIcfgContainer [2020-07-20 13:12:11,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:12:11,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:12:11,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:12:11,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:12:11,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:12:10" (1/3) ... [2020-07-20 13:12:11,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bcc3c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:12:11, skipping insertion in model container [2020-07-20 13:12:11,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:12:10" (2/3) ... [2020-07-20 13:12:11,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bcc3c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:12:11, skipping insertion in model container [2020-07-20 13:12:11,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:12:11" (3/3) ... [2020-07-20 13:12:11,241 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi01.c [2020-07-20 13:12:11,253 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:12:11,262 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:12:11,277 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:12:11,305 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:12:11,306 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:12:11,306 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:12:11,306 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:12:11,306 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:12:11,307 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:12:11,307 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:12:11,307 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:12:11,328 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 13:12:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 13:12:11,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:11,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:11,337 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:11,344 INFO L82 PathProgramCache]: Analyzing trace with hash -629617454, now seen corresponding path program 1 times [2020-07-20 13:12:11,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:11,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163481124] [2020-07-20 13:12:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:11,438 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:12:11,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:11,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:12:11,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:12:11,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:12:11,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163481124] [2020-07-20 13:12:11,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:12:11,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:12:11,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211410779] [2020-07-20 13:12:11,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:12:11,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:11,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:12:11,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:12:11,585 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-07-20 13:12:11,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:11,757 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-07-20 13:12:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:12:11,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 13:12:11,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:11,772 INFO L225 Difference]: With dead ends: 48 [2020-07-20 13:12:11,772 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 13:12:11,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:12:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 13:12:11,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 13:12:11,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 13:12:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-07-20 13:12:11,831 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 20 [2020-07-20 13:12:11,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:11,832 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-07-20 13:12:11,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:12:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-07-20 13:12:11,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 13:12:11,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:11,836 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:12,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:12,051 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:12,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:12,052 INFO L82 PathProgramCache]: Analyzing trace with hash 223523063, now seen corresponding path program 1 times [2020-07-20 13:12:12,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:12,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343622551] [2020-07-20 13:12:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:12,140 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:12,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:12,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 13:12:12,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 13:12:12,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 13:12:12,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343622551] [2020-07-20 13:12:12,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:12,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2020-07-20 13:12:12,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814252018] [2020-07-20 13:12:12,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:12:12,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:12,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:12:12,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:12:12,539 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 15 states. [2020-07-20 13:12:13,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:13,190 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2020-07-20 13:12:13,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 13:12:13,191 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-07-20 13:12:13,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:13,195 INFO L225 Difference]: With dead ends: 78 [2020-07-20 13:12:13,195 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 13:12:13,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-07-20 13:12:13,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 13:12:13,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2020-07-20 13:12:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 13:12:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2020-07-20 13:12:13,223 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 30 [2020-07-20 13:12:13,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:13,223 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2020-07-20 13:12:13,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:12:13,224 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2020-07-20 13:12:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 13:12:13,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:13,227 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:13,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:13,443 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:13,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:13,444 INFO L82 PathProgramCache]: Analyzing trace with hash 640231516, now seen corresponding path program 2 times [2020-07-20 13:12:13,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:13,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889147459] [2020-07-20 13:12:13,445 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:13,503 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:12:13,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:13,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:12:13,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 13:12:13,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:13,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:13,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 13:12:13,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889147459] [2020-07-20 13:12:13,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:13,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 13:12:13,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595399500] [2020-07-20 13:12:13,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:12:13,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:13,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:12:13,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:12:13,919 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand 11 states. [2020-07-20 13:12:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:14,154 INFO L93 Difference]: Finished difference Result 108 states and 173 transitions. [2020-07-20 13:12:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:12:14,156 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-20 13:12:14,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:14,163 INFO L225 Difference]: With dead ends: 108 [2020-07-20 13:12:14,163 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 13:12:14,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:12:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 13:12:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-07-20 13:12:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 13:12:14,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-07-20 13:12:14,196 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 40 [2020-07-20 13:12:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:14,196 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-07-20 13:12:14,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:12:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-07-20 13:12:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 13:12:14,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:14,199 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] [2020-07-20 13:12:14,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:14,414 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:14,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:14,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1772916587, now seen corresponding path program 1 times [2020-07-20 13:12:14,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:14,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105279180] [2020-07-20 13:12:14,416 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:14,469 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:14,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:14,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:12:14,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:12:14,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:14,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:14,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:14,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 13:12:14,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105279180] [2020-07-20 13:12:14,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:14,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:12:14,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204544435] [2020-07-20 13:12:14,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:12:14,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:14,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:12:14,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:12:14,873 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 13 states. [2020-07-20 13:12:15,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:15,059 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-07-20 13:12:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:12:15,061 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-07-20 13:12:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:15,066 INFO L225 Difference]: With dead ends: 80 [2020-07-20 13:12:15,066 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 13:12:15,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:12:15,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 13:12:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-20 13:12:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 13:12:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2020-07-20 13:12:15,103 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 36 [2020-07-20 13:12:15,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:15,104 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2020-07-20 13:12:15,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:12:15,104 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2020-07-20 13:12:15,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 13:12:15,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:15,110 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:15,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:15,311 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:15,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:15,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1240446734, now seen corresponding path program 3 times [2020-07-20 13:12:15,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:15,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690095729] [2020-07-20 13:12:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:15,370 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:15,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:15,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:12:15,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 13:12:15,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:15,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 13:12:15,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690095729] [2020-07-20 13:12:15,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:15,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 13:12:15,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003393277] [2020-07-20 13:12:15,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:12:15,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:15,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:12:15,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:12:15,740 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand 11 states. [2020-07-20 13:12:15,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:15,953 INFO L93 Difference]: Finished difference Result 91 states and 141 transitions. [2020-07-20 13:12:15,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:12:15,954 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-20 13:12:15,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:15,956 INFO L225 Difference]: With dead ends: 91 [2020-07-20 13:12:15,956 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 13:12:15,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-07-20 13:12:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 13:12:15,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-07-20 13:12:15,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 13:12:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-20 13:12:15,987 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 40 [2020-07-20 13:12:15,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:15,988 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-20 13:12:15,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:12:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-20 13:12:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 13:12:15,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:15,993 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:16,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:16,211 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:16,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1471069545, now seen corresponding path program 4 times [2020-07-20 13:12:16,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:16,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991997772] [2020-07-20 13:12:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:16,282 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:16,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:16,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:12:16,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-07-20 13:12:16,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:16,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:16,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:16,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-20 13:12:16,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991997772] [2020-07-20 13:12:16,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:16,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:12:16,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445197466] [2020-07-20 13:12:16,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:12:16,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:16,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:12:16,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:12:16,787 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 13 states. [2020-07-20 13:12:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:16,980 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-07-20 13:12:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:12:16,981 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-07-20 13:12:16,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:16,984 INFO L225 Difference]: With dead ends: 58 [2020-07-20 13:12:16,984 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 13:12:16,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:12:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 13:12:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-07-20 13:12:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 13:12:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-07-20 13:12:16,994 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 50 [2020-07-20 13:12:16,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:16,995 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-07-20 13:12:16,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:12:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-07-20 13:12:16,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 13:12:16,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:16,997 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:17,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:17,207 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:17,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:17,207 INFO L82 PathProgramCache]: Analyzing trace with hash -979408629, now seen corresponding path program 2 times [2020-07-20 13:12:17,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:17,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578795215] [2020-07-20 13:12:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:17,275 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:17,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:17,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-20 13:12:17,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-20 13:12:17,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 13:12:18,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578795215] [2020-07-20 13:12:18,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:18,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 27 [2020-07-20 13:12:18,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583620494] [2020-07-20 13:12:18,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 13:12:18,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:18,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 13:12:18,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:12:18,041 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 27 states. [2020-07-20 13:12:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:19,784 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2020-07-20 13:12:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 13:12:19,784 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-07-20 13:12:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:19,786 INFO L225 Difference]: With dead ends: 105 [2020-07-20 13:12:19,786 INFO L226 Difference]: Without dead ends: 101 [2020-07-20 13:12:19,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 13:12:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-20 13:12:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2020-07-20 13:12:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 13:12:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 115 transitions. [2020-07-20 13:12:19,807 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 115 transitions. Word has length 56 [2020-07-20 13:12:19,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:19,808 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 115 transitions. [2020-07-20 13:12:19,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 13:12:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 115 transitions. [2020-07-20 13:12:19,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 13:12:19,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:19,811 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:20,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:20,025 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:20,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:20,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1033208535, now seen corresponding path program 3 times [2020-07-20 13:12:20,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:20,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431591248] [2020-07-20 13:12:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:20,090 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:20,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:20,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:12:20,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-20 13:12:20,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:20,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:20,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:20,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:20,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:20,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:20,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:20,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:20,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-07-20 13:12:20,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431591248] [2020-07-20 13:12:20,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:20,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 13:12:20,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711152134] [2020-07-20 13:12:20,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:12:20,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:20,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:12:20,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:12:20,816 INFO L87 Difference]: Start difference. First operand 84 states and 115 transitions. Second operand 17 states. [2020-07-20 13:12:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:21,065 INFO L93 Difference]: Finished difference Result 103 states and 147 transitions. [2020-07-20 13:12:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:12:21,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-07-20 13:12:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:21,068 INFO L225 Difference]: With dead ends: 103 [2020-07-20 13:12:21,068 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 13:12:21,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 13:12:21,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 13:12:21,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-07-20 13:12:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 13:12:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-07-20 13:12:21,087 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 62 [2020-07-20 13:12:21,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:21,088 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-07-20 13:12:21,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:12:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-07-20 13:12:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-20 13:12:21,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:21,092 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:21,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:21,308 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:21,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:21,309 INFO L82 PathProgramCache]: Analyzing trace with hash -633873909, now seen corresponding path program 4 times [2020-07-20 13:12:21,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:21,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616090161] [2020-07-20 13:12:21,311 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:21,398 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:21,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:21,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 13:12:21,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 122 proven. 63 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2020-07-20 13:12:21,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:21,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:21,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 126 proven. 57 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2020-07-20 13:12:22,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616090161] [2020-07-20 13:12:22,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:22,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 18 [2020-07-20 13:12:22,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875978784] [2020-07-20 13:12:22,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:12:22,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:22,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:12:22,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:12:22,368 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 18 states. [2020-07-20 13:12:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:22,747 INFO L93 Difference]: Finished difference Result 135 states and 214 transitions. [2020-07-20 13:12:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 13:12:22,749 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2020-07-20 13:12:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:22,751 INFO L225 Difference]: With dead ends: 135 [2020-07-20 13:12:22,752 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 13:12:22,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 162 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:12:22,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 13:12:22,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2020-07-20 13:12:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 13:12:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2020-07-20 13:12:22,765 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 96 [2020-07-20 13:12:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:22,765 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2020-07-20 13:12:22,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:12:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2020-07-20 13:12:22,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 13:12:22,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:22,768 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 10, 9, 9, 9, 9, 9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:22,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:22,983 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:22,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:22,984 INFO L82 PathProgramCache]: Analyzing trace with hash -913129353, now seen corresponding path program 5 times [2020-07-20 13:12:22,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:22,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419686967] [2020-07-20 13:12:22,986 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:23,095 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:12:23,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:23,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:12:23,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 182 proven. 205 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2020-07-20 13:12:23,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:23,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:24,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:24,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:24,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:24,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:24,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:24,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:24,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:24,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 182 proven. 218 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2020-07-20 13:12:24,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419686967] [2020-07-20 13:12:24,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:24,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 13:12:24,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143691119] [2020-07-20 13:12:24,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 13:12:24,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:24,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 13:12:24,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 13:12:24,502 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand 19 states. [2020-07-20 13:12:24,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:24,931 INFO L93 Difference]: Finished difference Result 134 states and 210 transitions. [2020-07-20 13:12:24,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 13:12:24,932 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 122 [2020-07-20 13:12:24,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:24,937 INFO L225 Difference]: With dead ends: 134 [2020-07-20 13:12:24,937 INFO L226 Difference]: Without dead ends: 89 [2020-07-20 13:12:24,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 211 SyntacticMatches, 15 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2020-07-20 13:12:24,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-20 13:12:24,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2020-07-20 13:12:24,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 13:12:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2020-07-20 13:12:24,952 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 122 [2020-07-20 13:12:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:24,953 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2020-07-20 13:12:24,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 13:12:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2020-07-20 13:12:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-20 13:12:24,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:24,955 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:25,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:25,167 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:25,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:25,168 INFO L82 PathProgramCache]: Analyzing trace with hash 542454743, now seen corresponding path program 6 times [2020-07-20 13:12:25,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:25,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131056926] [2020-07-20 13:12:25,169 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:25,277 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:25,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:25,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 91 conjunts are in the unsatisfiable core [2020-07-20 13:12:25,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-07-20 13:12:25,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-07-20 13:12:27,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131056926] [2020-07-20 13:12:27,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:27,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 32] total 45 [2020-07-20 13:12:27,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028824574] [2020-07-20 13:12:27,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 13:12:27,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:27,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 13:12:27,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 13:12:27,296 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand 45 states. [2020-07-20 13:12:30,151 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 26 [2020-07-20 13:12:35,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:35,310 INFO L93 Difference]: Finished difference Result 211 states and 283 transitions. [2020-07-20 13:12:35,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-07-20 13:12:35,311 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 102 [2020-07-20 13:12:35,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:35,315 INFO L225 Difference]: With dead ends: 211 [2020-07-20 13:12:35,315 INFO L226 Difference]: Without dead ends: 207 [2020-07-20 13:12:35,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 148 SyntacticMatches, 14 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3230 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1797, Invalid=10413, Unknown=0, NotChecked=0, Total=12210 [2020-07-20 13:12:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-07-20 13:12:35,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2020-07-20 13:12:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-20 13:12:35,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 258 transitions. [2020-07-20 13:12:35,394 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 258 transitions. Word has length 102 [2020-07-20 13:12:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:35,397 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 258 transitions. [2020-07-20 13:12:35,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 13:12:35,398 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 258 transitions. [2020-07-20 13:12:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 13:12:35,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:35,406 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:35,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:35,621 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:35,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:35,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1145252683, now seen corresponding path program 7 times [2020-07-20 13:12:35,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:35,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993649531] [2020-07-20 13:12:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:35,753 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:35,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:35,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 13:12:35,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 138 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-07-20 13:12:35,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:36,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:36,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:36,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:36,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:36,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:36,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:36,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:37,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:37,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:37,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:37,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 156 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-07-20 13:12:37,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993649531] [2020-07-20 13:12:37,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:37,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 13:12:37,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668057227] [2020-07-20 13:12:37,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 13:12:37,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:37,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 13:12:37,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 13:12:37,116 INFO L87 Difference]: Start difference. First operand 189 states and 258 transitions. Second operand 21 states. [2020-07-20 13:12:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:37,504 INFO L93 Difference]: Finished difference Result 215 states and 295 transitions. [2020-07-20 13:12:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:12:37,505 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 108 [2020-07-20 13:12:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:37,508 INFO L225 Difference]: With dead ends: 215 [2020-07-20 13:12:37,508 INFO L226 Difference]: Without dead ends: 177 [2020-07-20 13:12:37,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 179 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 13:12:37,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-20 13:12:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 161. [2020-07-20 13:12:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-20 13:12:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 224 transitions. [2020-07-20 13:12:37,541 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 224 transitions. Word has length 108 [2020-07-20 13:12:37,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:37,541 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 224 transitions. [2020-07-20 13:12:37,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 13:12:37,541 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 224 transitions. [2020-07-20 13:12:37,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 13:12:37,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:37,544 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 12, 11, 11, 11, 11, 11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:37,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:37,755 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:37,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:37,756 INFO L82 PathProgramCache]: Analyzing trace with hash -370212393, now seen corresponding path program 8 times [2020-07-20 13:12:37,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:37,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853672481] [2020-07-20 13:12:37,757 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:37,895 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:37,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:37,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 13:12:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 304 proven. 216 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2020-07-20 13:12:38,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:38,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:38,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:38,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:39,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:39,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:39,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:39,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:39,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:39,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:39,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 311 proven. 203 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-07-20 13:12:39,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853672481] [2020-07-20 13:12:39,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:39,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 20 [2020-07-20 13:12:39,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85838669] [2020-07-20 13:12:39,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:12:39,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:39,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:12:39,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:12:39,494 INFO L87 Difference]: Start difference. First operand 161 states and 224 transitions. Second operand 20 states. [2020-07-20 13:12:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:39,851 INFO L93 Difference]: Finished difference Result 252 states and 375 transitions. [2020-07-20 13:12:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 13:12:39,855 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 142 [2020-07-20 13:12:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:39,858 INFO L225 Difference]: With dead ends: 252 [2020-07-20 13:12:39,858 INFO L226 Difference]: Without dead ends: 182 [2020-07-20 13:12:39,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 250 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2020-07-20 13:12:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-20 13:12:39,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2020-07-20 13:12:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-07-20 13:12:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 215 transitions. [2020-07-20 13:12:39,877 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 215 transitions. Word has length 142 [2020-07-20 13:12:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:39,878 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 215 transitions. [2020-07-20 13:12:39,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:12:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 215 transitions. [2020-07-20 13:12:39,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-07-20 13:12:39,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:39,881 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:40,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:40,097 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:40,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2107974185, now seen corresponding path program 9 times [2020-07-20 13:12:40,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:40,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934205833] [2020-07-20 13:12:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:40,294 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:40,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:40,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 13:12:40,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 189 proven. 356 refuted. 0 times theorem prover too weak. 1539 trivial. 0 not checked. [2020-07-20 13:12:40,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:40,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:40,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:40,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:41,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:41,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:41,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:42,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:42,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:42,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:12:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 193 proven. 338 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2020-07-20 13:12:42,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934205833] [2020-07-20 13:12:42,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:42,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 22 [2020-07-20 13:12:42,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057873234] [2020-07-20 13:12:42,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:12:42,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:42,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:12:42,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:12:42,199 INFO L87 Difference]: Start difference. First operand 158 states and 215 transitions. Second operand 22 states. [2020-07-20 13:12:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:12:42,716 INFO L93 Difference]: Finished difference Result 178 states and 241 transitions. [2020-07-20 13:12:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 13:12:42,717 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 182 [2020-07-20 13:12:42,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:12:42,721 INFO L225 Difference]: With dead ends: 178 [2020-07-20 13:12:42,721 INFO L226 Difference]: Without dead ends: 174 [2020-07-20 13:12:42,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 326 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2020-07-20 13:12:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-07-20 13:12:42,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 161. [2020-07-20 13:12:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-20 13:12:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 218 transitions. [2020-07-20 13:12:42,739 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 218 transitions. Word has length 182 [2020-07-20 13:12:42,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:12:42,739 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 218 transitions. [2020-07-20 13:12:42,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:12:42,740 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 218 transitions. [2020-07-20 13:12:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-07-20 13:12:42,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:12:42,743 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:12:42,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:42,957 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:12:42,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:12:42,958 INFO L82 PathProgramCache]: Analyzing trace with hash 836851019, now seen corresponding path program 10 times [2020-07-20 13:12:42,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:12:42,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452523030] [2020-07-20 13:12:42,959 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:12:43,157 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:12:43,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:12:43,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 175 conjunts are in the unsatisfiable core [2020-07-20 13:12:43,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:12:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2020-07-20 13:12:43,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:12:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-07-20 13:12:49,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452523030] [2020-07-20 13:12:49,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:12:49,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 58] total 75 [2020-07-20 13:12:49,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936581900] [2020-07-20 13:12:49,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-20 13:12:49,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:12:49,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-20 13:12:49,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=5282, Unknown=0, NotChecked=0, Total=5550 [2020-07-20 13:12:49,040 INFO L87 Difference]: Start difference. First operand 161 states and 218 transitions. Second operand 75 states. [2020-07-20 13:12:49,602 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 49 [2020-07-20 13:12:49,877 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 46 [2020-07-20 13:12:50,133 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 47 [2020-07-20 13:12:50,369 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 43 [2020-07-20 13:12:50,619 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 44 [2020-07-20 13:12:50,833 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 40 [2020-07-20 13:12:51,066 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 41 [2020-07-20 13:12:51,271 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 37 [2020-07-20 13:12:51,497 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 38 [2020-07-20 13:12:51,688 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2020-07-20 13:12:52,082 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-07-20 13:12:52,328 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2020-07-20 13:12:52,588 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 32 [2020-07-20 13:12:52,768 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 28 [2020-07-20 13:12:53,018 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 29 [2020-07-20 13:12:55,676 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 45 [2020-07-20 13:12:56,057 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 42 [2020-07-20 13:12:56,418 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 39 [2020-07-20 13:12:56,760 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 36 [2020-07-20 13:12:57,105 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 33 [2020-07-20 13:12:57,418 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 30 [2020-07-20 13:12:57,708 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 26 [2020-07-20 13:12:59,774 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 44 [2020-07-20 13:13:00,139 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 46 [2020-07-20 13:13:00,496 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 42 [2020-07-20 13:13:00,839 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 43 [2020-07-20 13:13:01,171 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 39 [2020-07-20 13:13:01,504 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 40 [2020-07-20 13:13:01,813 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 36 [2020-07-20 13:13:02,153 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2020-07-20 13:13:02,438 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 33 [2020-07-20 13:13:02,732 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-07-20 13:13:03,001 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 30 [2020-07-20 13:13:03,285 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 32 [2020-07-20 13:13:03,533 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 26 [2020-07-20 13:13:03,803 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 29 [2020-07-20 13:13:04,037 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 23 [2020-07-20 13:13:04,281 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 26 [2020-07-20 13:13:04,750 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 23 [2020-07-20 13:13:07,306 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 47 [2020-07-20 13:13:07,737 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 50 [2020-07-20 13:13:08,118 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 44 [2020-07-20 13:13:08,511 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 47 [2020-07-20 13:13:08,874 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 41 [2020-07-20 13:13:09,233 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 44 [2020-07-20 13:13:09,574 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2020-07-20 13:13:09,952 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 41 [2020-07-20 13:13:10,271 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-07-20 13:13:10,618 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 38 [2020-07-20 13:13:10,922 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 32 [2020-07-20 13:13:11,229 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 35 [2020-07-20 13:13:11,509 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 30 [2020-07-20 13:13:11,797 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 32 [2020-07-20 13:13:12,019 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 27 [2020-07-20 13:13:12,255 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-20 13:13:12,701 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 27 [2020-07-20 13:13:13,834 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2020-07-20 13:13:14,409 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-20 13:13:14,989 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 29 [2020-07-20 13:13:15,803 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2020-07-20 13:13:17,744 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2020-07-20 13:13:18,058 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2020-07-20 13:13:18,442 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 47 [2020-07-20 13:13:18,983 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 50 [2020-07-20 13:13:19,343 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 44 [2020-07-20 13:13:19,696 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2020-07-20 13:13:20,365 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-07-20 13:13:20,812 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2020-07-20 13:13:21,061 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 7 [2020-07-20 13:13:21,847 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2020-07-20 13:13:22,240 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-07-20 13:13:22,632 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-07-20 13:13:22,960 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-07-20 13:13:23,774 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2020-07-20 13:13:24,059 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 23 [2020-07-20 13:13:25,054 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-07-20 13:13:27,267 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 9 [2020-07-20 13:13:27,501 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 9 [2020-07-20 13:13:27,966 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 44 [2020-07-20 13:13:28,484 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 41 [2020-07-20 13:13:28,806 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2020-07-20 13:13:29,487 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2020-07-20 13:13:29,812 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 29 [2020-07-20 13:13:31,003 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2020-07-20 13:13:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:13:31,080 INFO L93 Difference]: Finished difference Result 528 states and 796 transitions. [2020-07-20 13:13:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-07-20 13:13:31,081 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 188 [2020-07-20 13:13:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:13:31,089 INFO L225 Difference]: With dead ends: 528 [2020-07-20 13:13:31,089 INFO L226 Difference]: Without dead ends: 524 [2020-07-20 13:13:31,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 262 SyntacticMatches, 42 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16690 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=8020, Invalid=46970, Unknown=0, NotChecked=0, Total=54990 [2020-07-20 13:13:31,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-07-20 13:13:31,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 441. [2020-07-20 13:13:31,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-07-20 13:13:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 635 transitions. [2020-07-20 13:13:31,159 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 635 transitions. Word has length 188 [2020-07-20 13:13:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:13:31,160 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 635 transitions. [2020-07-20 13:13:31,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-20 13:13:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 635 transitions. [2020-07-20 13:13:31,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-07-20 13:13:31,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:13:31,165 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:13:31,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:31,380 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:13:31,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:13:31,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1322769943, now seen corresponding path program 11 times [2020-07-20 13:13:31,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:13:31,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132094580] [2020-07-20 13:13:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:31,581 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:13:31,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:13:31,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 13:13:31,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:13:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 415 refuted. 0 times theorem prover too weak. 1592 trivial. 0 not checked. [2020-07-20 13:13:31,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:13:32,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:32,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:32,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:32,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:32,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:32,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:32,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:32,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:33,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:33,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:33,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:34,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:34,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:34,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 447 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2020-07-20 13:13:34,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132094580] [2020-07-20 13:13:34,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:13:34,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-20 13:13:34,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126471332] [2020-07-20 13:13:34,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 13:13:34,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:13:34,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 13:13:34,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-20 13:13:34,174 INFO L87 Difference]: Start difference. First operand 441 states and 635 transitions. Second operand 25 states. [2020-07-20 13:13:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:13:34,722 INFO L93 Difference]: Finished difference Result 502 states and 783 transitions. [2020-07-20 13:13:34,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 13:13:34,723 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 194 [2020-07-20 13:13:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:13:34,731 INFO L225 Difference]: With dead ends: 502 [2020-07-20 13:13:34,731 INFO L226 Difference]: Without dead ends: 478 [2020-07-20 13:13:34,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 343 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 13:13:34,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-07-20 13:13:34,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 427. [2020-07-20 13:13:34,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-07-20 13:13:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 618 transitions. [2020-07-20 13:13:34,798 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 618 transitions. Word has length 194 [2020-07-20 13:13:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:13:34,799 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 618 transitions. [2020-07-20 13:13:34,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 13:13:34,799 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 618 transitions. [2020-07-20 13:13:34,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-20 13:13:34,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:13:34,805 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:13:35,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:35,020 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:13:35,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:13:35,021 INFO L82 PathProgramCache]: Analyzing trace with hash -547968693, now seen corresponding path program 12 times [2020-07-20 13:13:35,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:13:35,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665312098] [2020-07-20 13:13:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:35,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:13:35,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:13:35,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 13:13:35,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:13:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1087 refuted. 0 times theorem prover too weak. 7431 trivial. 0 not checked. [2020-07-20 13:13:35,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:13:36,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:36,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:36,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:38,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:38,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:38,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:39,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:39,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:39,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:39,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:39,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:39,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:13:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1121 refuted. 0 times theorem prover too weak. 7397 trivial. 0 not checked. [2020-07-20 13:13:39,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665312098] [2020-07-20 13:13:39,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:13:39,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-20 13:13:39,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677134077] [2020-07-20 13:13:39,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 13:13:39,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:13:39,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 13:13:39,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-07-20 13:13:39,447 INFO L87 Difference]: Start difference. First operand 427 states and 618 transitions. Second operand 25 states. [2020-07-20 13:13:40,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:13:40,011 INFO L93 Difference]: Finished difference Result 478 states and 724 transitions. [2020-07-20 13:13:40,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 13:13:40,013 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 348 [2020-07-20 13:13:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:13:40,019 INFO L225 Difference]: With dead ends: 478 [2020-07-20 13:13:40,019 INFO L226 Difference]: Without dead ends: 443 [2020-07-20 13:13:40,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 651 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 13:13:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-07-20 13:13:40,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 394. [2020-07-20 13:13:40,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-07-20 13:13:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 572 transitions. [2020-07-20 13:13:40,065 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 572 transitions. Word has length 348 [2020-07-20 13:13:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:13:40,066 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 572 transitions. [2020-07-20 13:13:40,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 13:13:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 572 transitions. [2020-07-20 13:13:40,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-20 13:13:40,071 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:13:40,072 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:13:40,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:40,286 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:13:40,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:13:40,287 INFO L82 PathProgramCache]: Analyzing trace with hash -604098025, now seen corresponding path program 13 times [2020-07-20 13:13:40,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:13:40,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745956170] [2020-07-20 13:13:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:13:40,650 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:13:40,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:13:40,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 339 conjunts are in the unsatisfiable core [2020-07-20 13:13:40,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:13:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 2940 refuted. 0 times theorem prover too weak. 5854 trivial. 0 not checked. [2020-07-20 13:13:41,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:13:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 8644 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-07-20 13:13:59,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745956170] [2020-07-20 13:13:59,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:13:59,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 108] total 129 [2020-07-20 13:13:59,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964187131] [2020-07-20 13:13:59,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2020-07-20 13:13:59,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:13:59,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2020-07-20 13:13:59,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=16060, Unknown=0, NotChecked=0, Total=16512 [2020-07-20 13:13:59,269 INFO L87 Difference]: Start difference. First operand 394 states and 572 transitions. Second operand 129 states. [2020-07-20 13:13:59,840 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 6 [2020-07-20 13:14:00,812 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 97 [2020-07-20 13:14:01,606 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 94 [2020-07-20 13:14:02,446 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 95 [2020-07-20 13:14:03,155 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 91 [2020-07-20 13:14:03,929 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 92 [2020-07-20 13:14:04,606 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 88 [2020-07-20 13:14:05,367 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 89 [2020-07-20 13:14:06,034 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 85 [2020-07-20 13:14:06,754 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 86 [2020-07-20 13:14:07,405 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 82 [2020-07-20 13:14:08,111 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 83 [2020-07-20 13:14:08,792 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 79 [2020-07-20 13:14:09,628 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 80 [2020-07-20 13:14:10,260 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 76 [2020-07-20 13:14:11,075 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 77 [2020-07-20 13:14:11,684 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 73 [2020-07-20 13:14:12,474 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 74 [2020-07-20 13:14:13,110 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 70 [2020-07-20 13:14:13,818 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 71 [2020-07-20 13:14:14,357 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 67 [2020-07-20 13:14:15,053 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 68 [2020-07-20 13:14:15,597 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 64 [2020-07-20 13:14:16,290 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 65 [2020-07-20 13:14:16,836 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 61 [2020-07-20 13:14:17,535 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 62 [2020-07-20 13:14:18,027 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 58 [2020-07-20 13:14:18,682 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 59 [2020-07-20 13:14:19,153 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 55 [2020-07-20 13:14:19,798 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 56 [2020-07-20 13:14:20,255 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 52 [2020-07-20 13:14:20,905 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2020-07-20 13:14:21,336 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 49 [2020-07-20 13:14:21,926 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 50 [2020-07-20 13:14:22,343 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 46 [2020-07-20 13:14:22,902 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 47 [2020-07-20 13:14:23,290 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 43 [2020-07-20 13:14:23,819 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 44 [2020-07-20 13:14:24,197 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-07-20 13:14:24,727 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 41 [2020-07-20 13:14:25,088 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 37 [2020-07-20 13:14:25,650 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 38 [2020-07-20 13:14:25,976 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 34 [2020-07-20 13:14:26,467 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-07-20 13:14:26,794 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 31 [2020-07-20 13:14:27,268 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 32 [2020-07-20 13:14:27,584 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2020-07-20 13:14:28,051 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 29 [2020-07-20 13:14:28,333 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 25 [2020-07-20 13:14:28,764 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 26 [2020-07-20 13:14:33,664 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 89 [2020-07-20 13:14:34,915 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 86 [2020-07-20 13:14:36,067 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 83 [2020-07-20 13:14:37,186 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 80 [2020-07-20 13:14:38,272 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 77 [2020-07-20 13:14:39,370 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 74 [2020-07-20 13:14:40,410 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 71 [2020-07-20 13:14:41,418 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 68 [2020-07-20 13:14:42,395 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 65 [2020-07-20 13:14:43,365 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 62 [2020-07-20 13:14:44,272 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 59 [2020-07-20 13:14:45,147 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 56 [2020-07-20 13:14:46,004 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 53 [2020-07-20 13:14:46,819 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 51 [2020-07-20 13:14:47,589 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 48 [2020-07-20 13:14:48,375 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 45 [2020-07-20 13:14:49,111 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 42 [2020-07-20 13:14:49,818 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 39 [2020-07-20 13:14:50,490 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 36 [2020-07-20 13:14:51,140 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2020-07-20 13:14:51,765 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2020-07-20 13:14:52,352 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 27 [2020-07-20 13:14:52,915 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 24 [2020-07-20 13:14:53,491 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 21 [2020-07-20 13:14:57,273 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 89 [2020-07-20 13:14:58,523 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 249 DAG size of output: 91 [2020-07-20 13:14:59,706 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 86 [2020-07-20 13:15:00,819 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 88 [2020-07-20 13:15:01,875 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 83 [2020-07-20 13:15:03,101 WARN L193 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 86 [2020-07-20 13:15:04,220 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 80 [2020-07-20 13:15:05,376 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 83 [2020-07-20 13:15:06,481 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 77 [2020-07-20 13:15:07,611 WARN L193 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 80 [2020-07-20 13:15:08,681 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 74 [2020-07-20 13:15:09,750 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 77 [2020-07-20 13:15:10,772 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 71 [2020-07-20 13:15:11,845 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 74 [2020-07-20 13:15:12,838 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 68 [2020-07-20 13:15:13,862 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 71 [2020-07-20 13:15:14,809 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 65 [2020-07-20 13:15:15,797 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 68 [2020-07-20 13:15:16,741 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 62 [2020-07-20 13:15:17,698 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 65 [2020-07-20 13:15:18,587 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 59 [2020-07-20 13:15:19,504 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 62 [2020-07-20 13:15:20,352 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 56 [2020-07-20 13:15:21,253 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 59 [2020-07-20 13:15:22,091 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 53 [2020-07-20 13:15:22,950 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 56 [2020-07-20 13:15:23,738 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 51 [2020-07-20 13:15:24,556 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 53 [2020-07-20 13:15:25,316 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 48 [2020-07-20 13:15:26,103 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 50 [2020-07-20 13:15:26,828 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 45 [2020-07-20 13:15:27,568 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 47 [2020-07-20 13:15:28,271 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 42 [2020-07-20 13:15:28,985 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 44 [2020-07-20 13:15:29,660 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 39 [2020-07-20 13:15:30,372 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 41 [2020-07-20 13:15:31,017 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 36 [2020-07-20 13:15:31,682 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 38 [2020-07-20 13:15:32,314 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2020-07-20 13:15:32,949 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 35 [2020-07-20 13:15:33,553 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2020-07-20 13:15:34,153 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 32 [2020-07-20 13:15:34,718 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 27 [2020-07-20 13:15:35,321 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 29 [2020-07-20 13:15:35,868 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 24 [2020-07-20 13:15:36,418 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 26 [2020-07-20 13:15:36,944 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 21 [2020-07-20 13:15:37,478 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 23 [2020-07-20 13:15:37,970 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 18 [2020-07-20 13:15:38,474 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 20 [2020-07-20 13:15:41,890 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2020-07-20 13:15:42,457 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2020-07-20 13:15:42,877 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-20 13:15:44,366 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 249 DAG size of output: 91 [2020-07-20 13:15:45,904 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 259 DAG size of output: 94 [2020-07-20 13:15:47,344 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 242 DAG size of output: 88 [2020-07-20 13:15:48,791 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 251 DAG size of output: 91 [2020-07-20 13:15:50,149 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 237 DAG size of output: 85 [2020-07-20 13:15:51,536 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 244 DAG size of output: 88 [2020-07-20 13:15:52,880 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 230 DAG size of output: 82 [2020-07-20 13:15:54,220 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 239 DAG size of output: 85 [2020-07-20 13:15:55,541 WARN L193 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 79 [2020-07-20 13:15:56,862 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 232 DAG size of output: 82 [2020-07-20 13:15:58,167 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 77 [2020-07-20 13:15:59,455 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 79 [2020-07-20 13:16:00,718 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 74 [2020-07-20 13:16:01,994 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 76 [2020-07-20 13:16:03,234 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 71 [2020-07-20 13:16:04,488 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 74 [2020-07-20 13:16:05,694 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 68 [2020-07-20 13:16:06,969 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 71 [2020-07-20 13:16:08,139 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 65 [2020-07-20 13:16:09,317 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 68 [2020-07-20 13:16:10,478 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 62 [2020-07-20 13:16:11,615 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 65 [2020-07-20 13:16:12,715 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 59 [2020-07-20 13:16:13,860 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 62 [2020-07-20 13:16:14,907 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 56 [2020-07-20 13:16:15,997 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 59 [2020-07-20 13:16:17,014 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 53 [2020-07-20 13:16:18,051 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 56 [2020-07-20 13:16:19,043 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 50 [2020-07-20 13:16:20,083 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 53 [2020-07-20 13:16:21,017 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 47 [2020-07-20 13:16:22,003 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 50 [2020-07-20 13:16:22,891 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 44 [2020-07-20 13:16:23,812 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 47 [2020-07-20 13:16:24,692 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 41 [2020-07-20 13:16:25,579 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 44 [2020-07-20 13:16:26,398 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 38 [2020-07-20 13:16:27,278 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 41 [2020-07-20 13:16:28,069 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 35 [2020-07-20 13:16:28,901 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 38 [2020-07-20 13:16:30,082 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 32 [2020-07-20 13:16:31,213 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-07-20 13:16:31,930 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 29 [2020-07-20 13:16:32,687 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 32 [2020-07-20 13:16:33,280 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-20 13:16:33,914 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-07-20 13:16:34,469 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-20 13:16:35,065 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-20 13:16:37,832 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2020-07-20 13:16:38,432 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-07-20 13:16:38,947 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-20 13:16:39,515 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-20 13:16:39,967 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2020-07-20 13:16:40,508 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-20 13:16:41,133 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2020-07-20 13:16:41,685 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-20 13:16:42,287 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-07-20 13:16:42,764 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2020-07-20 13:16:44,853 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2020-07-20 13:16:45,912 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-07-20 13:16:47,162 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2020-07-20 13:16:48,976 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-20 13:16:49,906 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2020-07-20 13:16:50,874 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-20 13:16:52,620 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-07-20 13:16:54,063 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-07-20 13:16:55,194 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-07-20 13:16:56,567 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 62 [2020-07-20 13:16:57,830 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2020-07-20 13:16:59,434 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-07-20 13:17:00,783 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 53 [2020-07-20 13:17:02,151 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2020-07-20 13:17:03,110 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-07-20 13:17:04,490 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 56 [2020-07-20 13:17:05,912 WARN L193 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 65 [2020-07-20 13:17:07,526 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 197 DAG size of output: 86 [2020-07-20 13:17:09,140 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 71 [2020-07-20 13:17:10,974 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 68 [2020-07-20 13:17:12,632 WARN L193 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 77 [2020-07-20 13:17:14,278 WARN L193 SmtUtils]: Spent 934.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 74 [2020-07-20 13:17:15,579 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 59 [2020-07-20 13:17:17,217 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 182 DAG size of output: 80 [2020-07-20 13:17:18,899 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 203 DAG size of output: 89 [2020-07-20 13:17:20,638 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 220 DAG size of output: 95 [2020-07-20 13:17:22,757 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 211 DAG size of output: 92 [2020-07-20 13:17:24,535 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 190 DAG size of output: 83 [2020-07-20 13:17:26,466 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 229 DAG size of output: 98 [2020-07-20 13:17:27,578 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2020-07-20 13:17:28,347 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2020-07-20 13:17:30,570 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 259 DAG size of output: 94 [2020-07-20 13:17:32,683 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 268 DAG size of output: 97 [2020-07-20 13:17:34,875 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 251 DAG size of output: 91 [2020-07-20 13:17:36,866 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 260 DAG size of output: 94 [2020-07-20 13:17:38,818 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 244 DAG size of output: 88 [2020-07-20 13:17:40,816 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 252 DAG size of output: 91 [2020-07-20 13:17:42,710 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 239 DAG size of output: 85 [2020-07-20 13:17:44,624 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 245 DAG size of output: 88 [2020-07-20 13:17:46,580 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 232 DAG size of output: 82 [2020-07-20 13:17:48,488 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 240 DAG size of output: 85 [2020-07-20 13:17:50,336 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 224 DAG size of output: 79 [2020-07-20 13:17:52,220 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 233 DAG size of output: 82 [2020-07-20 13:17:54,010 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 219 DAG size of output: 76 [2020-07-20 13:17:55,851 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 225 DAG size of output: 79 [2020-07-20 13:17:57,658 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 213 DAG size of output: 73 [2020-07-20 13:17:59,526 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 220 DAG size of output: 76 [2020-07-20 13:18:01,316 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 204 DAG size of output: 70 [2020-07-20 13:18:03,426 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 258 DAG size of output: 95 [2020-07-20 13:18:05,236 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 214 DAG size of output: 73 [2020-07-20 13:18:07,459 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 266 DAG size of output: 98 [2020-07-20 13:18:09,183 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 196 DAG size of output: 67 [2020-07-20 13:18:10,917 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 205 DAG size of output: 70 [2020-07-20 13:18:13,048 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 250 DAG size of output: 92 [2020-07-20 13:18:14,660 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 190 DAG size of output: 64 [2020-07-20 13:18:16,352 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 197 DAG size of output: 67 [2020-07-20 13:18:18,433 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 243 DAG size of output: 89 [2020-07-20 13:18:20,090 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 183 DAG size of output: 61 [2020-07-20 13:18:21,763 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 191 DAG size of output: 64 [2020-07-20 13:18:23,873 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 238 DAG size of output: 86 [2020-07-20 13:18:25,646 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 175 DAG size of output: 58 [2020-07-20 13:18:27,338 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 184 DAG size of output: 61 [2020-07-20 13:18:29,595 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 231 DAG size of output: 83 [2020-07-20 13:18:31,307 WARN L193 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 55 [2020-07-20 13:18:32,922 WARN L193 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 58 [2020-07-20 13:18:35,065 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 223 DAG size of output: 80 [2020-07-20 13:18:36,636 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 53 [2020-07-20 13:18:38,215 WARN L193 SmtUtils]: Spent 954.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 55 [2020-07-20 13:18:40,411 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 218 DAG size of output: 77 [2020-07-20 13:18:41,990 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 51 [2020-07-20 13:18:43,404 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 53 [2020-07-20 13:18:45,261 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 48 [2020-07-20 13:18:46,641 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 51 [2020-07-20 13:18:48,007 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2020-07-20 13:18:49,303 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 48 [2020-07-20 13:18:50,819 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-07-20 13:18:52,053 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2020-07-20 13:18:53,514 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2020-07-20 13:18:54,683 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-07-20 13:18:57,065 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2020-07-20 13:18:57,936 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-07-20 13:18:58,701 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2020-07-20 13:18:59,414 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2020-07-20 13:19:00,349 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2020-07-20 13:19:03,569 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2020-07-20 13:19:04,737 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2020-07-20 13:19:07,419 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 44 [2020-07-20 13:19:09,242 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 35 [2020-07-20 13:19:10,861 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 38 [2020-07-20 13:19:12,960 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 208 DAG size of output: 86 [2020-07-20 13:19:15,097 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 217 DAG size of output: 89 [2020-07-20 13:19:16,782 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2020-07-20 13:19:18,120 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2020-07-20 13:19:20,415 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 50 [2020-07-20 13:19:24,104 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 47 [2020-07-20 13:19:25,927 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 14 [2020-07-20 13:19:28,690 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 53 [2020-07-20 13:19:29,964 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2020-07-20 13:19:32,010 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 26 [2020-07-20 13:19:33,149 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-20 13:19:34,632 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 23 [2020-07-20 13:19:36,811 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 200 DAG size of output: 83 [2020-07-20 13:19:39,181 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 166 DAG size of output: 68 [2020-07-20 13:19:40,809 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 29 [2020-07-20 13:19:42,837 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 149 DAG size of output: 62 [2020-07-20 13:19:44,930 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 157 DAG size of output: 65 [2020-07-20 13:19:47,387 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 179 DAG size of output: 74 [2020-07-20 13:19:49,547 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 173 DAG size of output: 71 [2020-07-20 13:19:51,575 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 143 DAG size of output: 59 [2020-07-20 13:19:54,154 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 187 DAG size of output: 77 [2020-07-20 13:20:05,427 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 226 DAG size of output: 92 [2020-07-20 13:20:10,005 WARN L193 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 50 [2020-07-20 13:20:12,249 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-07-20 13:20:13,662 WARN L193 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 47 [2020-07-20 13:20:15,476 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2020-07-20 13:20:16,607 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2020-07-20 13:20:18,680 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2020-07-20 13:20:21,369 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 41 [2020-07-20 13:20:25,096 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2020-07-20 13:20:27,305 WARN L193 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 53 [2020-07-20 13:20:54,051 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 231 DAG size of output: 98 [2020-07-20 13:20:55,429 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 224 DAG size of output: 7 [2020-07-20 13:20:56,416 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 6 [2020-07-20 13:20:57,359 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 13:21:00,529 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 222 DAG size of output: 95 [2020-07-20 13:21:02,846 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 213 DAG size of output: 92 [2020-07-20 13:21:05,727 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 205 DAG size of output: 89 [2020-07-20 13:21:09,055 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 199 DAG size of output: 86 [2020-07-20 13:21:12,282 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 192 DAG size of output: 83 [2020-07-20 13:21:15,312 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 184 DAG size of output: 80 [2020-07-20 13:21:18,472 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 178 DAG size of output: 77 [2020-07-20 13:21:21,254 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 171 DAG size of output: 74 [2020-07-20 13:21:27,833 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 127 DAG size of output: 56 [2020-07-20 13:21:31,013 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 162 DAG size of output: 71 [2020-07-20 13:21:34,084 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 154 DAG size of output: 68 [2020-07-20 13:21:36,466 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 148 DAG size of output: 65 [2020-07-20 13:21:38,454 WARN L193 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 62 [2020-07-20 13:21:40,271 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 59 [2020-07-20 13:21:43,315 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 194 DAG size of output: 80 [2020-07-20 13:21:44,613 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2020-07-20 13:21:46,400 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 56 [2020-07-20 13:21:48,053 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 38 [2020-07-20 13:21:56,076 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 13:21:56,858 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 13:21:57,654 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 13:21:58,460 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 13:21:59,320 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 13:22:00,241 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 13:22:01,213 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 13:22:02,030 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 8 [2020-07-20 13:22:03,499 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 9 [2020-07-20 13:22:04,550 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 9 [2020-07-20 13:22:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:22:04,831 INFO L93 Difference]: Finished difference Result 1231 states and 2149 transitions. [2020-07-20 13:22:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2020-07-20 13:22:04,835 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 354 [2020-07-20 13:22:04,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:22:04,848 INFO L225 Difference]: With dead ends: 1231 [2020-07-20 13:22:04,849 INFO L226 Difference]: Without dead ends: 1227 [2020-07-20 13:22:04,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1097 GetRequests, 516 SyntacticMatches, 66 SemanticMatches, 515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88138 ImplicationChecksByTransitivity, 360.6s TimeCoverageRelationStatistics Valid=38389, Invalid=228383, Unknown=0, NotChecked=0, Total=266772 [2020-07-20 13:22:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2020-07-20 13:22:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1036. [2020-07-20 13:22:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1036 states. [2020-07-20 13:22:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1613 transitions. [2020-07-20 13:22:05,040 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1613 transitions. Word has length 354 [2020-07-20 13:22:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:22:05,042 INFO L479 AbstractCegarLoop]: Abstraction has 1036 states and 1613 transitions. [2020-07-20 13:22:05,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 129 states. [2020-07-20 13:22:05,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1613 transitions. [2020-07-20 13:22:05,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-07-20 13:22:05,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:22:05,054 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:22:05,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:22:05,269 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:22:05,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:22:05,269 INFO L82 PathProgramCache]: Analyzing trace with hash 800684683, now seen corresponding path program 14 times [2020-07-20 13:22:05,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:22:05,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146148691] [2020-07-20 13:22:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:22:05,704 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:22:05,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:22:05,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 13:22:05,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:22:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1112 refuted. 0 times theorem prover too weak. 7456 trivial. 0 not checked. [2020-07-20 13:22:06,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:22:08,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:08,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:09,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:09,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:09,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:09,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:09,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:16,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:17,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:17,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:18,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:18,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:18,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:18,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:19,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:19,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1162 refuted. 0 times theorem prover too weak. 7406 trivial. 0 not checked. [2020-07-20 13:22:19,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146148691] [2020-07-20 13:22:19,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:22:19,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-20 13:22:19,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869796277] [2020-07-20 13:22:19,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 13:22:19,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:22:19,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 13:22:19,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-20 13:22:19,278 INFO L87 Difference]: Start difference. First operand 1036 states and 1613 transitions. Second operand 29 states. [2020-07-20 13:22:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:22:20,729 INFO L93 Difference]: Finished difference Result 1221 states and 2313 transitions. [2020-07-20 13:22:20,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 13:22:20,735 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 360 [2020-07-20 13:22:20,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:22:20,751 INFO L225 Difference]: With dead ends: 1221 [2020-07-20 13:22:20,751 INFO L226 Difference]: Without dead ends: 1194 [2020-07-20 13:22:20,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 667 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=319, Invalid=1321, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 13:22:20,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2020-07-20 13:22:21,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1024. [2020-07-20 13:22:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-07-20 13:22:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1655 transitions. [2020-07-20 13:22:21,173 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1655 transitions. Word has length 360 [2020-07-20 13:22:21,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:22:21,174 INFO L479 AbstractCegarLoop]: Abstraction has 1024 states and 1655 transitions. [2020-07-20 13:22:21,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 13:22:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1655 transitions. [2020-07-20 13:22:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-20 13:22:21,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:22:21,187 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 40, 39, 39, 39, 39, 39, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:22:21,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:22:21,401 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:22:21,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:22:21,401 INFO L82 PathProgramCache]: Analyzing trace with hash 548363287, now seen corresponding path program 15 times [2020-07-20 13:22:21,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:22:21,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050542371] [2020-07-20 13:22:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:22:21,785 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:22:21,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:22:21,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 13:22:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:22:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13858 backedges. 1076 proven. 2067 refuted. 0 times theorem prover too weak. 10715 trivial. 0 not checked. [2020-07-20 13:22:22,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:22:29,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:29,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:31,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:31,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:32,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:33,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:33,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:33,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:36,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:36,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:37,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:37,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:37,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:37,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:37,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13858 backedges. 1076 proven. 2108 refuted. 0 times theorem prover too weak. 10674 trivial. 0 not checked. [2020-07-20 13:22:37,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050542371] [2020-07-20 13:22:37,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:22:37,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 27 [2020-07-20 13:22:37,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424406511] [2020-07-20 13:22:37,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 13:22:37,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:22:37,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 13:22:37,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:22:37,965 INFO L87 Difference]: Start difference. First operand 1024 states and 1655 transitions. Second operand 27 states. [2020-07-20 13:22:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:22:40,348 INFO L93 Difference]: Finished difference Result 2084 states and 3744 transitions. [2020-07-20 13:22:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 13:22:40,354 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 434 [2020-07-20 13:22:40,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:22:40,367 INFO L225 Difference]: With dead ends: 2084 [2020-07-20 13:22:40,367 INFO L226 Difference]: Without dead ends: 1310 [2020-07-20 13:22:40,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 819 SyntacticMatches, 23 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=504, Invalid=1476, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 13:22:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2020-07-20 13:22:40,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 981. [2020-07-20 13:22:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2020-07-20 13:22:40,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1359 transitions. [2020-07-20 13:22:40,523 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1359 transitions. Word has length 434 [2020-07-20 13:22:40,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:22:40,523 INFO L479 AbstractCegarLoop]: Abstraction has 981 states and 1359 transitions. [2020-07-20 13:22:40,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 13:22:40,524 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1359 transitions. [2020-07-20 13:22:40,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-07-20 13:22:40,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:22:40,533 INFO L422 BasicCegarLoop]: trace histogram [95, 95, 48, 47, 47, 47, 47, 47, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:22:40,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:22:40,742 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:22:40,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:22:40,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1908418025, now seen corresponding path program 16 times [2020-07-20 13:22:40,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:22:40,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63100185] [2020-07-20 13:22:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:22:41,255 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:22:41,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:22:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 2426 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 13:22:41,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:22:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20074 backedges. 1640 proven. 2215 refuted. 0 times theorem prover too weak. 16219 trivial. 0 not checked. [2020-07-20 13:22:41,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:22:48,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:48,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:48,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:49,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:49,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:49,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:51,885 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 13:22:56,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:56,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:58,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:58,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:59,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:59,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:00,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:00,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20074 backedges. 1640 proven. 2256 refuted. 0 times theorem prover too weak. 16178 trivial. 0 not checked. [2020-07-20 13:23:00,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63100185] [2020-07-20 13:23:00,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:23:00,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 27 [2020-07-20 13:23:00,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473473530] [2020-07-20 13:23:00,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 13:23:00,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:23:00,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 13:23:00,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:23:00,743 INFO L87 Difference]: Start difference. First operand 981 states and 1359 transitions. Second operand 27 states. [2020-07-20 13:23:03,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:23:03,088 INFO L93 Difference]: Finished difference Result 1347 states and 1939 transitions. [2020-07-20 13:23:03,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 13:23:03,095 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 514 [2020-07-20 13:23:03,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:23:03,104 INFO L225 Difference]: With dead ends: 1347 [2020-07-20 13:23:03,104 INFO L226 Difference]: Without dead ends: 1181 [2020-07-20 13:23:03,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 979 SyntacticMatches, 23 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=489, Invalid=1403, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 13:23:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2020-07-20 13:23:03,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 978. [2020-07-20 13:23:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-07-20 13:23:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1326 transitions. [2020-07-20 13:23:03,223 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1326 transitions. Word has length 514 [2020-07-20 13:23:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:23:03,224 INFO L479 AbstractCegarLoop]: Abstraction has 978 states and 1326 transitions. [2020-07-20 13:23:03,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 13:23:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1326 transitions. [2020-07-20 13:23:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2020-07-20 13:23:03,235 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:23:03,235 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:23:03,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:23:03,450 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:23:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:23:03,450 INFO L82 PathProgramCache]: Analyzing trace with hash 2099436055, now seen corresponding path program 17 times [2020-07-20 13:23:03,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:23:03,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651104598] [2020-07-20 13:23:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:23:04,112 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:23:04,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:23:04,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 3210 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 13:23:04,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:23:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 537 proven. 2750 refuted. 0 times theorem prover too weak. 32675 trivial. 0 not checked. [2020-07-20 13:23:04,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:23:06,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:06,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:06,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:06,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:07,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:07,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:07,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:18,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:18,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:22,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:22,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:24,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:24,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:25,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:26,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:26,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:26,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:26,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 537 proven. 2802 refuted. 0 times theorem prover too weak. 32623 trivial. 0 not checked. [2020-07-20 13:23:27,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651104598] [2020-07-20 13:23:27,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:23:27,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-20 13:23:27,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185238610] [2020-07-20 13:23:27,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 13:23:27,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:23:27,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 13:23:27,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-07-20 13:23:27,300 INFO L87 Difference]: Start difference. First operand 978 states and 1326 transitions. Second operand 29 states. [2020-07-20 13:23:29,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:23:29,725 INFO L93 Difference]: Finished difference Result 1043 states and 1391 transitions. [2020-07-20 13:23:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 13:23:29,735 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 674 [2020-07-20 13:23:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:23:29,744 INFO L225 Difference]: With dead ends: 1043 [2020-07-20 13:23:29,745 INFO L226 Difference]: Without dead ends: 1039 [2020-07-20 13:23:29,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1359 GetRequests, 1295 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=325, Invalid=1315, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 13:23:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2020-07-20 13:23:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 981. [2020-07-20 13:23:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2020-07-20 13:23:29,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1329 transitions. [2020-07-20 13:23:29,867 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1329 transitions. Word has length 674 [2020-07-20 13:23:29,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:23:29,868 INFO L479 AbstractCegarLoop]: Abstraction has 981 states and 1329 transitions. [2020-07-20 13:23:29,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 13:23:29,869 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1329 transitions. [2020-07-20 13:23:29,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2020-07-20 13:23:29,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:23:29,880 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:23:30,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:23:30,094 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:23:30,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:23:30,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2092966539, now seen corresponding path program 18 times [2020-07-20 13:23:30,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:23:30,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434728907] [2020-07-20 13:23:30,095 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:23:30,848 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:23:30,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:23:30,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 3224 conjuncts, 663 conjunts are in the unsatisfiable core [2020-07-20 13:23:30,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:23:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 35990 backedges. 0 proven. 12010 refuted. 0 times theorem prover too weak. 23980 trivial. 0 not checked. [2020-07-20 13:23:36,189 INFO L328 TraceCheckSpWp]: Computing backward predicates...