/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:17:48,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:17:48,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:17:48,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:17:48,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:17:48,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:17:48,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:17:48,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:17:48,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:17:48,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:17:48,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:17:48,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:17:48,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:17:48,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:17:48,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:17:48,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:17:48,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:17:48,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:17:48,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:17:48,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:17:48,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:17:48,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:17:48,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:17:48,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:17:48,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:17:48,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:17:48,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:17:48,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:17:48,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:17:48,271 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:17:48,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:17:48,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:17:48,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:17:48,278 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:17:48,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:17:48,278 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:17:48,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:17:48,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:17:48,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:17:48,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:17:48,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:17:48,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:17:48,280 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:17:48,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:17:48,280 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:17:48,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:17:48,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:17:48,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:17:48,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:17:48,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:17:48,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:17:48,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:17:48,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:17:48,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:17:48,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:17:48,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:48,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:17:48,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:17:48,286 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 22:17:48,586 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:17:48,604 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:17:48,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:17:48,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:17:48,611 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:17:48,611 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_25-1.c [2020-07-21 22:17:48,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41b1fa85a/a002b3c4e7f34570a1e3b0afa4fd96c0/FLAG9d9fec2d8 [2020-07-21 22:17:49,143 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:17:49,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_25-1.c [2020-07-21 22:17:49,151 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41b1fa85a/a002b3c4e7f34570a1e3b0afa4fd96c0/FLAG9d9fec2d8 [2020-07-21 22:17:49,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41b1fa85a/a002b3c4e7f34570a1e3b0afa4fd96c0 [2020-07-21 22:17:49,579 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:17:49,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:17:49,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:17:49,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:17:49,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:17:49,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:17:49" (1/1) ... [2020-07-21 22:17:49,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf52ac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:49, skipping insertion in model container [2020-07-21 22:17:49,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:17:49" (1/1) ... [2020-07-21 22:17:49,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:17:49,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:17:49,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:17:49,766 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:17:49,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:17:49,799 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:17:49,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:49 WrapperNode [2020-07-21 22:17:49,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:17:49,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:17:49,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:17:49,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:17:49,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:49" (1/1) ... [2020-07-21 22:17:49,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:49" (1/1) ... [2020-07-21 22:17:49,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:49" (1/1) ... [2020-07-21 22:17:49,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:49" (1/1) ... [2020-07-21 22:17:49,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:49" (1/1) ... [2020-07-21 22:17:49,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:49" (1/1) ... [2020-07-21 22:17:49,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:49" (1/1) ... [2020-07-21 22:17:49,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:17:49,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:17:49,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:17:49,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:17:49,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:17:49,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:17:49,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:17:49,987 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 22:17:49,987 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 22:17:49,987 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:17:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:17:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:17:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 22:17:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 22:17:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:17:49,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:17:49,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:17:50,181 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:17:50,181 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:17:50,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:17:50 BoogieIcfgContainer [2020-07-21 22:17:50,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:17:50,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:17:50,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:17:50,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:17:50,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:17:49" (1/3) ... [2020-07-21 22:17:50,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b14f5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:17:50, skipping insertion in model container [2020-07-21 22:17:50,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:49" (2/3) ... [2020-07-21 22:17:50,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b14f5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:17:50, skipping insertion in model container [2020-07-21 22:17:50,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:17:50" (3/3) ... [2020-07-21 22:17:50,195 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_25-1.c [2020-07-21 22:17:50,207 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:17:50,215 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:17:50,235 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:17:50,264 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:17:50,265 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:17:50,265 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:17:50,265 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:17:50,265 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:17:50,266 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:17:50,266 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:17:50,266 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:17:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 22:17:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:17:50,296 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:50,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:50,298 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:50,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 22:17:50,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:50,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931343857] [2020-07-21 22:17:50,317 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 [2020-07-21 22:17:50,400 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:50,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:50,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:17:50,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:17:50,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:17:50,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931343857] [2020-07-21 22:17:50,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:17:50,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:17:50,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994088657] [2020-07-21 22:17:50,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:17:50,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:50,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:17:50,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:17:50,523 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 22:17:50,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:50,632 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 22:17:50,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:17:50,634 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:17:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:50,645 INFO L225 Difference]: With dead ends: 44 [2020-07-21 22:17:50,646 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 22:17:50,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:17:50,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 22:17:50,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 22:17:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:17:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:17:50,698 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 22:17:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:50,699 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:17:50,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:17:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:17:50,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:17:50,702 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:50,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:50,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:50,916 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:50,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 22:17:50,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:50,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12616236] [2020-07-21 22:17:50,919 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 [2020-07-21 22:17:50,947 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:17:50,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:50,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:17:50,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:17:50,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:17:50,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12616236] [2020-07-21 22:17:50,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:17:50,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:17:50,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315079784] [2020-07-21 22:17:50,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:17:50,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:50,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:17:50,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:17:50,986 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 22:17:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:51,053 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 22:17:51,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:17:51,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 22:17:51,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:51,056 INFO L225 Difference]: With dead ends: 36 [2020-07-21 22:17:51,056 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 22:17:51,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:17:51,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 22:17:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 22:17:51,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:17:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:17:51,068 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 22:17:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:51,068 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:17:51,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:17:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:17:51,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:17:51,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:51,070 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:51,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:51,287 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:51,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:51,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 22:17:51,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:51,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87167883] [2020-07-21 22:17:51,290 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 [2020-07-21 22:17:51,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:51,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:51,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:17:51,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:17:51,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:51,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:51,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:17:51,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87167883] [2020-07-21 22:17:51,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:51,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:17:51,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365453628] [2020-07-21 22:17:51,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:17:51,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:51,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:17:51,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:17:51,629 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 22:17:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:51,748 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 22:17:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:17:51,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 22:17:51,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:51,751 INFO L225 Difference]: With dead ends: 41 [2020-07-21 22:17:51,751 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 22:17:51,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:17:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 22:17:51,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 22:17:51,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:17:51,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:17:51,762 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 22:17:51,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:51,762 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:17:51,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:17:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:17:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:17:51,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:51,765 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:51,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:51,978 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:51,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:51,979 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 22:17:51,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:51,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867341076] [2020-07-21 22:17:51,980 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 [2020-07-21 22:17:52,006 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:52,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:52,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:17:52,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:17:52,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:52,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:52,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:17:52,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867341076] [2020-07-21 22:17:52,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:52,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:17:52,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699719105] [2020-07-21 22:17:52,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:17:52,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:52,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:17:52,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:17:52,252 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 22:17:52,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:52,370 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 22:17:52,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:17:52,370 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 22:17:52,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:52,373 INFO L225 Difference]: With dead ends: 46 [2020-07-21 22:17:52,373 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:17:52,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:17:52,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:17:52,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 22:17:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:17:52,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:17:52,383 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 22:17:52,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:52,383 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:17:52,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:17:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:17:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 22:17:52,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:52,386 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:52,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:52,602 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:52,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:52,602 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 22:17:52,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:52,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374437155] [2020-07-21 22:17:52,603 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 [2020-07-21 22:17:52,633 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:52,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:52,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:17:52,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 22:17:52,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:52,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:53,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:53,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:17:53,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374437155] [2020-07-21 22:17:53,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:53,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:17:53,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823690062] [2020-07-21 22:17:53,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:17:53,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:53,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:17:53,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:17:53,126 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 22:17:53,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:53,307 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 22:17:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:17:53,308 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 22:17:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:53,310 INFO L225 Difference]: With dead ends: 51 [2020-07-21 22:17:53,310 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 22:17:53,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:17:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 22:17:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 22:17:53,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:17:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:17:53,320 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 22:17:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:53,321 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:17:53,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:17:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:17:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 22:17:53,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:53,323 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:53,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:53,537 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:53,538 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 22:17:53,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:53,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112221466] [2020-07-21 22:17:53,540 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 [2020-07-21 22:17:53,566 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:53,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:53,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:17:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 22:17:53,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:53,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:53,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:53,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:17:53,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112221466] [2020-07-21 22:17:53,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:53,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:17:53,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430905563] [2020-07-21 22:17:53,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:17:53,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:53,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:17:53,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:17:53,929 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 22:17:54,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:54,086 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 22:17:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:17:54,090 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 22:17:54,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:54,097 INFO L225 Difference]: With dead ends: 56 [2020-07-21 22:17:54,097 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 22:17:54,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:17:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 22:17:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 22:17:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:17:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:17:54,122 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 22:17:54,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:54,123 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:17:54,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:17:54,123 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:17:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 22:17:54,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:54,131 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:54,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:54,349 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:54,349 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 22:17:54,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:54,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536276029] [2020-07-21 22:17:54,350 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 [2020-07-21 22:17:54,380 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:54,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:54,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:17:54,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 22:17:54,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:54,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:54,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:54,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:54,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:17:55,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536276029] [2020-07-21 22:17:55,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:55,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:17:55,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081195757] [2020-07-21 22:17:55,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:17:55,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:55,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:17:55,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:17:55,002 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 22:17:55,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:55,184 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 22:17:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:17:55,184 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 22:17:55,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:55,186 INFO L225 Difference]: With dead ends: 61 [2020-07-21 22:17:55,186 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 22:17:55,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:17:55,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 22:17:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 22:17:55,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:17:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:17:55,204 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 22:17:55,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:55,204 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:17:55,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:17:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:17:55,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 22:17:55,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:55,207 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:55,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:55,410 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:55,411 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 22:17:55,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:55,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741978450] [2020-07-21 22:17:55,412 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 [2020-07-21 22:17:55,447 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:55,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:55,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:17:55,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 22:17:55,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:55,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:55,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:55,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:55,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:56,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:17:56,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741978450] [2020-07-21 22:17:56,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:56,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:17:56,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565061820] [2020-07-21 22:17:56,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:17:56,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:56,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:17:56,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:17:56,045 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 22:17:56,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:56,242 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 22:17:56,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:17:56,243 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 22:17:56,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:56,246 INFO L225 Difference]: With dead ends: 66 [2020-07-21 22:17:56,246 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 22:17:56,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:17:56,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 22:17:56,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 22:17:56,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:17:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:17:56,259 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 22:17:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:56,259 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:17:56,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:17:56,260 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:17:56,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 22:17:56,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:56,261 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:56,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:56,475 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:56,476 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 22:17:56,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:56,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370138297] [2020-07-21 22:17:56,477 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 [2020-07-21 22:17:56,522 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:56,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:56,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:17:56,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 22:17:56,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:57,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 22:17:57,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370138297] [2020-07-21 22:17:57,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:57,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 22:17:57,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804856786] [2020-07-21 22:17:57,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:17:57,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:57,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:17:57,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:17:57,526 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 22:17:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:57,772 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 22:17:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:17:57,774 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 22:17:57,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:57,776 INFO L225 Difference]: With dead ends: 71 [2020-07-21 22:17:57,777 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 22:17:57,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:17:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 22:17:57,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 22:17:57,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:17:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:17:57,795 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 22:17:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:57,796 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:17:57,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:17:57,796 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:17:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 22:17:57,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:57,801 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:58,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:58,003 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:58,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:58,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 22:17:58,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:58,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726656719] [2020-07-21 22:17:58,006 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:58,051 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:58,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:58,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:17:58,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 22:17:58,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:58,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:58,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:58,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:58,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 22:17:59,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726656719] [2020-07-21 22:17:59,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:59,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 22:17:59,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656256424] [2020-07-21 22:17:59,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:17:59,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:59,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:17:59,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:17:59,049 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 22:17:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:59,266 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 22:17:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:17:59,266 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 22:17:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:59,268 INFO L225 Difference]: With dead ends: 76 [2020-07-21 22:17:59,268 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 22:17:59,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:17:59,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 22:17:59,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 22:17:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:17:59,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:17:59,283 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 22:17:59,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:59,284 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:17:59,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:17:59,284 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:17:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 22:17:59,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:59,289 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:59,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:59,504 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:59,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:59,505 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 22:17:59,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:59,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617303975] [2020-07-21 22:17:59,507 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 [2020-07-21 22:17:59,577 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:59,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:59,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:17:59,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 22:17:59,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:00,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:01,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:01,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:01,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:01,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:01,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:01,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:01,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 22:18:01,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617303975] [2020-07-21 22:18:01,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:01,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 22:18:01,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168340786] [2020-07-21 22:18:01,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:18:01,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:01,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:18:01,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:18:01,345 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 22:18:01,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:01,604 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 22:18:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:18:01,605 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 22:18:01,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:01,608 INFO L225 Difference]: With dead ends: 81 [2020-07-21 22:18:01,608 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 22:18:01,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:18:01,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 22:18:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 22:18:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 22:18:01,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 22:18:01,619 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 22:18:01,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:01,620 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 22:18:01,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:18:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 22:18:01,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 22:18:01,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:01,623 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:01,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:01,839 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:01,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:01,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 22:18:01,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:01,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393476695] [2020-07-21 22:18:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:01,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:01,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:01,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:18:01,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 22:18:01,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:02,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:03,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:03,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:03,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:03,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:03,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:03,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 22:18:03,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393476695] [2020-07-21 22:18:03,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:03,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 22:18:03,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051585188] [2020-07-21 22:18:03,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:18:03,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:03,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:18:03,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:18:03,389 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 22:18:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:03,667 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 22:18:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:18:03,668 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 22:18:03,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:03,670 INFO L225 Difference]: With dead ends: 86 [2020-07-21 22:18:03,670 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 22:18:03,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:18:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 22:18:03,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 22:18:03,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 22:18:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 22:18:03,681 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 22:18:03,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:03,681 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 22:18:03,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:18:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 22:18:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 22:18:03,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:03,684 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:03,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:03,896 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:03,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:03,896 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 22:18:03,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:03,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425621537] [2020-07-21 22:18:03,897 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:03,982 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:03,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:03,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:18:03,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 22:18:04,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:05,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:05,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:05,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:05,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:05,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:06,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:06,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:06,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:06,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:06,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:06,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 22:18:06,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425621537] [2020-07-21 22:18:06,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:06,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:18:06,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926794111] [2020-07-21 22:18:06,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:18:06,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:06,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:18:06,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:18:06,354 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 22:18:06,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:06,741 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 22:18:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:18:06,741 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 22:18:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:06,744 INFO L225 Difference]: With dead ends: 91 [2020-07-21 22:18:06,745 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 22:18:06,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:18:06,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 22:18:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 22:18:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:18:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 22:18:06,757 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 22:18:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:06,757 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 22:18:06,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:18:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 22:18:06,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 22:18:06,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:06,761 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:06,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:06,974 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:06,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:06,974 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 22:18:06,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:06,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778887267] [2020-07-21 22:18:06,975 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 [2020-07-21 22:18:07,076 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:07,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:07,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:18:07,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 22:18:07,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:08,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:08,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:08,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:09,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:09,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:09,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:09,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:09,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 22:18:09,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778887267] [2020-07-21 22:18:09,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:09,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:18:09,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267901217] [2020-07-21 22:18:09,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:18:09,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:09,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:18:09,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:18:09,544 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-21 22:18:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:09,890 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 22:18:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:18:09,891 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-21 22:18:09,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:09,893 INFO L225 Difference]: With dead ends: 96 [2020-07-21 22:18:09,893 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 22:18:09,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:18:09,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 22:18:09,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 22:18:09,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:18:09,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 22:18:09,906 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 22:18:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:09,907 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 22:18:09,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:18:09,907 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 22:18:09,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 22:18:09,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:09,914 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:10,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:10,129 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:10,129 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 22:18:10,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:10,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81738120] [2020-07-21 22:18:10,130 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 [2020-07-21 22:18:10,273 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:10,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:10,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:18:10,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 22:18:10,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:12,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:12,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:14,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 22:18:14,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81738120] [2020-07-21 22:18:14,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:14,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 22:18:14,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956623898] [2020-07-21 22:18:14,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:18:14,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:14,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:18:14,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:18:14,096 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-21 22:18:14,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:14,551 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 22:18:14,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:18:14,552 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-21 22:18:14,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:14,555 INFO L225 Difference]: With dead ends: 101 [2020-07-21 22:18:14,557 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 22:18:14,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:18:14,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 22:18:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 22:18:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:18:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 22:18:14,584 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 22:18:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:14,585 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 22:18:14,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:18:14,586 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 22:18:14,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 22:18:14,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:14,591 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 22, 21, 21, 14, 14, 14, 14, 14, 14, 14, 14, 12, 10, 10, 10, 10, 10, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:14,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:14,806 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:14,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:14,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-21 22:18:14,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:14,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122962629] [2020-07-21 22:18:14,807 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 [2020-07-21 22:18:14,982 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:14,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:14,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:18:14,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:15,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 762 refuted. 0 times theorem prover too weak. 2319 trivial. 0 not checked. [2020-07-21 22:18:15,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:17,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:17,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:17,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:18,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:18,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:18,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:18,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:18,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:18,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 795 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-21 22:18:18,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122962629] [2020-07-21 22:18:18,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:18,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 22:18:18,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056409445] [2020-07-21 22:18:18,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:18:18,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:18,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:18:18,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:18:18,814 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-21 22:18:19,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:19,264 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-21 22:18:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:18:19,265 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-21 22:18:19,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:19,268 INFO L225 Difference]: With dead ends: 106 [2020-07-21 22:18:19,268 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 22:18:19,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 638 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:18:19,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 22:18:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-21 22:18:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:18:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 22:18:19,290 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-21 22:18:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:19,291 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 22:18:19,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:18:19,292 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 22:18:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-21 22:18:19,299 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:19,299 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 52, 52, 47, 36, 36, 36, 36, 36, 36, 36, 36, 26, 26, 26, 26, 26, 26, 26, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:19,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:19,514 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:19,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:19,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-21 22:18:19,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:19,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899104717] [2020-07-21 22:18:19,515 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 [2020-07-21 22:18:19,771 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:19,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:19,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:18:19,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2371 refuted. 0 times theorem prover too weak. 17847 trivial. 0 not checked. [2020-07-21 22:18:20,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:23,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:24,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:25,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:25,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2411 refuted. 0 times theorem prover too weak. 17807 trivial. 0 not checked. [2020-07-21 22:18:27,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899104717] [2020-07-21 22:18:27,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:27,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 22:18:27,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004287989] [2020-07-21 22:18:27,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 22:18:27,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:27,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 22:18:27,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:18:27,257 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-21 22:18:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:27,793 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-21 22:18:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:18:27,794 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-21 22:18:27,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:27,798 INFO L225 Difference]: With dead ends: 111 [2020-07-21 22:18:27,798 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 22:18:27,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1599 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:18:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 22:18:27,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-21 22:18:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 22:18:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 22:18:27,813 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-21 22:18:27,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:27,814 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 22:18:27,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 22:18:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 22:18:27,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-21 22:18:27,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:27,818 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 27, 24, 24, 18, 18, 18, 18, 18, 18, 18, 18, 15, 12, 12, 12, 12, 12, 12, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:28,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:28,032 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:28,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:28,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-21 22:18:28,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:28,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159108618] [2020-07-21 22:18:28,033 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 [2020-07-21 22:18:28,258 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:28,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:28,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:18:28,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1118 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2020-07-21 22:18:28,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:31,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:32,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:32,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:32,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:33,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:33,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:33,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:33,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:33,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:33,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:33,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1162 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2020-07-21 22:18:33,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159108618] [2020-07-21 22:18:33,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:33,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 22:18:33,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712102758] [2020-07-21 22:18:33,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 22:18:33,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:33,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 22:18:33,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:18:33,767 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 24 states. [2020-07-21 22:18:34,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:34,286 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-21 22:18:34,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:18:34,289 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 418 [2020-07-21 22:18:34,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:34,293 INFO L225 Difference]: With dead ends: 116 [2020-07-21 22:18:34,293 INFO L226 Difference]: Without dead ends: 112 [2020-07-21 22:18:34,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 796 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:18:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-21 22:18:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-21 22:18:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 22:18:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 22:18:34,308 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-21 22:18:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:34,309 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 22:18:34,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 22:18:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 22:18:34,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2020-07-21 22:18:34,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:34,318 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 46, 45, 45, 34, 34, 34, 34, 34, 34, 34, 34, 22, 22, 22, 22, 22, 22, 22, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:34,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:34,533 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:34,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1563866591, now seen corresponding path program 8 times [2020-07-21 22:18:34,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:34,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728301494] [2020-07-21 22:18:34,534 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 [2020-07-21 22:18:34,873 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:34,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:34,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:18:34,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2323 refuted. 0 times theorem prover too weak. 14314 trivial. 0 not checked. [2020-07-21 22:18:35,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:39,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:39,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:40,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:40,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:41,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:42,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:42,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:42,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:43,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:43,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:43,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:43,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:43,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:43,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:43,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2375 refuted. 0 times theorem prover too weak. 14262 trivial. 0 not checked. [2020-07-21 22:18:43,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728301494] [2020-07-21 22:18:43,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:43,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-21 22:18:43,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64109046] [2020-07-21 22:18:43,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 22:18:43,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:43,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 22:18:43,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:18:43,779 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 26 states. [2020-07-21 22:18:44,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:44,310 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-21 22:18:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:18:44,311 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 741 [2020-07-21 22:18:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:44,315 INFO L225 Difference]: With dead ends: 121 [2020-07-21 22:18:44,315 INFO L226 Difference]: Without dead ends: 117 [2020-07-21 22:18:44,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1493 GetRequests, 1439 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 22:18:44,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-21 22:18:44,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-21 22:18:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 22:18:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 22:18:44,328 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 741 [2020-07-21 22:18:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:44,329 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 22:18:44,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 22:18:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 22:18:44,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-21 22:18:44,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:44,337 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 55, 55, 53, 37, 37, 37, 37, 37, 37, 37, 37, 27, 27, 27, 27, 27, 27, 27, 26, 21, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:44,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:44,550 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:44,551 INFO L82 PathProgramCache]: Analyzing trace with hash 2100501163, now seen corresponding path program 4 times [2020-07-21 22:18:44,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:44,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791459823] [2020-07-21 22:18:44,552 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 [2020-07-21 22:18:44,912 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:44,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:44,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:18:44,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2821 refuted. 0 times theorem prover too weak. 19575 trivial. 0 not checked. [2020-07-21 22:18:45,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:49,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:49,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:51,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:52,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:52,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2877 refuted. 0 times theorem prover too weak. 19519 trivial. 0 not checked. [2020-07-21 22:18:54,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791459823] [2020-07-21 22:18:54,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:54,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-21 22:18:54,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316926728] [2020-07-21 22:18:54,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 22:18:54,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:54,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 22:18:54,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:18:54,496 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 26 states. [2020-07-21 22:18:55,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:55,100 INFO L93 Difference]: Finished difference Result 126 states and 350 transitions. [2020-07-21 22:18:55,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:18:55,101 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 871 [2020-07-21 22:18:55,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:55,105 INFO L225 Difference]: With dead ends: 126 [2020-07-21 22:18:55,105 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 22:18:55,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1752 GetRequests, 1698 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 22:18:55,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 22:18:55,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-07-21 22:18:55,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 22:18:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 22:18:55,118 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 871 [2020-07-21 22:18:55,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:55,119 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 22:18:55,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 22:18:55,119 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 22:18:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1691 [2020-07-21 22:18:55,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:55,144 INFO L422 BasicCegarLoop]: trace histogram [149, 149, 110, 110, 94, 74, 74, 74, 74, 74, 74, 74, 74, 55, 55, 55, 55, 55, 55, 55, 55, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:55,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:55,359 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:55,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1326645612, now seen corresponding path program 9 times [2020-07-21 22:18:55,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:55,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291131139] [2020-07-21 22:18:55,360 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 [2020-07-21 22:18:55,861 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:55,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:55,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 22:18:55,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6392 refuted. 0 times theorem prover too weak. 81780 trivial. 0 not checked. [2020-07-21 22:18:57,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:05,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:05,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:08,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:09,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:10,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:11,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:11,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:12,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:12,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:12,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:12,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:12,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:12,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:12,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6457 refuted. 0 times theorem prover too weak. 81715 trivial. 0 not checked. [2020-07-21 22:19:13,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291131139] [2020-07-21 22:19:13,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:13,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-21 22:19:13,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484638257] [2020-07-21 22:19:13,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 22:19:13,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:13,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 22:19:13,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:19:13,890 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 28 states. [2020-07-21 22:19:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:14,653 INFO L93 Difference]: Finished difference Result 131 states and 376 transitions. [2020-07-21 22:19:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 22:19:14,654 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1690 [2020-07-21 22:19:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:14,659 INFO L225 Difference]: With dead ends: 131 [2020-07-21 22:19:14,659 INFO L226 Difference]: Without dead ends: 127 [2020-07-21 22:19:14,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3392 GetRequests, 3333 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 22:19:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-21 22:19:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 80. [2020-07-21 22:19:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 22:19:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-21 22:19:14,673 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1690 [2020-07-21 22:19:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:14,675 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-21 22:19:14,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 22:19:14,675 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-21 22:19:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1433 [2020-07-21 22:19:14,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:14,692 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 92, 92, 87, 60, 60, 60, 60, 60, 60, 60, 60, 46, 46, 46, 46, 46, 46, 46, 41, 34, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:14,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:14,907 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:14,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:14,908 INFO L82 PathProgramCache]: Analyzing trace with hash -37703149, now seen corresponding path program 5 times [2020-07-21 22:19:14,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:14,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821761052] [2020-07-21 22:19:14,909 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 [2020-07-21 22:19:15,530 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:19:15,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 22:19:15,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5319 refuted. 0 times theorem prover too weak. 56349 trivial. 0 not checked. [2020-07-21 22:19:17,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:23,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:23,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:26,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:26,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:28,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:28,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:29,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:30,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:31,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:31,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:31,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:31,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:31,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:31,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5389 refuted. 0 times theorem prover too weak. 56279 trivial. 0 not checked. [2020-07-21 22:19:32,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821761052] [2020-07-21 22:19:32,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:32,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-21 22:19:32,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856105733] [2020-07-21 22:19:32,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 22:19:32,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:32,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 22:19:32,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:19:32,636 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 28 states. [2020-07-21 22:19:33,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:33,319 INFO L93 Difference]: Finished difference Result 136 states and 404 transitions. [2020-07-21 22:19:33,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 22:19:33,322 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1432 [2020-07-21 22:19:33,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:33,325 INFO L225 Difference]: With dead ends: 136 [2020-07-21 22:19:33,325 INFO L226 Difference]: Without dead ends: 132 [2020-07-21 22:19:33,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2875 GetRequests, 2816 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 22:19:33,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-21 22:19:33,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-07-21 22:19:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 22:19:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-21 22:19:33,340 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1432 [2020-07-21 22:19:33,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:33,342 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-21 22:19:33,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 22:19:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-21 22:19:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1990 [2020-07-21 22:19:33,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:33,372 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 112, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 64, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:33,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:33,588 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:33,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1412849447, now seen corresponding path program 10 times [2020-07-21 22:19:33,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:33,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100250256] [2020-07-21 22:19:33,589 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 [2020-07-21 22:19:34,283 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:19:34,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 22:19:34,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8137 refuted. 0 times theorem prover too weak. 114500 trivial. 0 not checked. [2020-07-21 22:19:35,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:45,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:45,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:49,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:51,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:51,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:54,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:55,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:56,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:56,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:56,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:56,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:57,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:57,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:57,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:57,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:57,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8217 refuted. 0 times theorem prover too weak. 114420 trivial. 0 not checked. [2020-07-21 22:19:58,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100250256] [2020-07-21 22:19:58,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:58,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-21 22:19:58,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975741738] [2020-07-21 22:19:58,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 22:19:58,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:58,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 22:19:58,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:19:58,990 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 30 states. [2020-07-21 22:20:00,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:00,049 INFO L93 Difference]: Finished difference Result 141 states and 432 transitions. [2020-07-21 22:20:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 22:20:00,051 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 1989 [2020-07-21 22:20:00,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:00,055 INFO L225 Difference]: With dead ends: 141 [2020-07-21 22:20:00,056 INFO L226 Difference]: Without dead ends: 137 [2020-07-21 22:20:00,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3991 GetRequests, 3927 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 22:20:00,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-21 22:20:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-07-21 22:20:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 22:20:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-21 22:20:00,072 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 1989 [2020-07-21 22:20:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:00,073 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-21 22:20:00,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 22:20:00,074 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-21 22:20:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2050 [2020-07-21 22:20:00,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:00,108 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 124, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 60, 52, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:00,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:00,323 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:00,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:00,325 INFO L82 PathProgramCache]: Analyzing trace with hash 266934567, now seen corresponding path program 5 times [2020-07-21 22:20:00,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:00,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245030610] [2020-07-21 22:20:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:01,071 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:01,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:01,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 22:20:01,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8506 refuted. 0 times theorem prover too weak. 119697 trivial. 0 not checked. [2020-07-21 22:20:02,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:12,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:12,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:16,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:20,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:20,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:22,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:23,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:24,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:25,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:25,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:25,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:25,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:25,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:26,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8591 refuted. 0 times theorem prover too weak. 119612 trivial. 0 not checked. [2020-07-21 22:20:27,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245030610] [2020-07-21 22:20:27,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:27,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-21 22:20:27,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969132210] [2020-07-21 22:20:27,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 22:20:27,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:27,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 22:20:27,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:20:27,533 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 30 states. [2020-07-21 22:20:28,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:28,591 INFO L93 Difference]: Finished difference Result 146 states and 462 transitions. [2020-07-21 22:20:28,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 22:20:28,593 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 2049 [2020-07-21 22:20:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:28,599 INFO L225 Difference]: With dead ends: 146 [2020-07-21 22:20:28,599 INFO L226 Difference]: Without dead ends: 142 [2020-07-21 22:20:28,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4110 GetRequests, 4046 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 22:20:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-21 22:20:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 85. [2020-07-21 22:20:28,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 22:20:28,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-21 22:20:28,615 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 2049 [2020-07-21 22:20:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:28,617 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-21 22:20:28,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 22:20:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-21 22:20:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3680 [2020-07-21 22:20:28,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:28,699 INFO L422 BasicCegarLoop]: trace histogram [329, 329, 236, 236, 211, 164, 164, 164, 164, 164, 164, 164, 164, 118, 118, 118, 118, 118, 118, 118, 118, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:28,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:28,900 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:28,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:28,902 INFO L82 PathProgramCache]: Analyzing trace with hash -886096047, now seen corresponding path program 11 times [2020-07-21 22:20:28,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:28,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352903988] [2020-07-21 22:20:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:29,935 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:29,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:29,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 22:20:29,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16770 refuted. 0 times theorem prover too weak. 408925 trivial. 0 not checked. [2020-07-21 22:20:34,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:53,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:00,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:05,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:05,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:11,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:14,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:14,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:15,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16866 refuted. 0 times theorem prover too weak. 408829 trivial. 0 not checked. [2020-07-21 22:21:23,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352903988] [2020-07-21 22:21:23,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:23,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-21 22:21:23,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966134907] [2020-07-21 22:21:23,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 22:21:23,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:23,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 22:21:23,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:21:23,124 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 32 states. [2020-07-21 22:21:24,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:24,392 INFO L93 Difference]: Finished difference Result 151 states and 492 transitions. [2020-07-21 22:21:24,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 22:21:24,393 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3679 [2020-07-21 22:21:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:24,401 INFO L225 Difference]: With dead ends: 151 [2020-07-21 22:21:24,402 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 22:21:24,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7372 GetRequests, 7303 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 22:21:24,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 22:21:24,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2020-07-21 22:21:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 22:21:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-21 22:21:24,427 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3679 [2020-07-21 22:21:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:24,429 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-21 22:21:24,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 22:21:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-21 22:21:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3365 [2020-07-21 22:21:24,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:24,548 INFO L422 BasicCegarLoop]: trace histogram [287, 287, 214, 214, 208, 143, 143, 143, 143, 143, 143, 143, 143, 107, 107, 107, 107, 107, 107, 107, 101, 79, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:24,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:24,763 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:24,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:24,764 INFO L82 PathProgramCache]: Analyzing trace with hash 147049693, now seen corresponding path program 6 times [2020-07-21 22:21:24,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:24,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569924221] [2020-07-21 22:21:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:25,833 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:25,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:25,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1867 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 22:21:25,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15526 refuted. 0 times theorem prover too weak. 332578 trivial. 0 not checked. [2020-07-21 22:21:29,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:47,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:47,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:55,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:04,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:04,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:07,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:07,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:11,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:13,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:14,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:15,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:15,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:15,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:15,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15628 refuted. 0 times theorem prover too weak. 332476 trivial. 0 not checked. [2020-07-21 22:22:19,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569924221] [2020-07-21 22:22:19,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:19,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-21 22:22:19,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136533248] [2020-07-21 22:22:19,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 22:22:19,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:19,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 22:22:19,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:22:19,371 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 32 states. [2020-07-21 22:22:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:20,937 INFO L93 Difference]: Finished difference Result 156 states and 524 transitions. [2020-07-21 22:22:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 22:22:20,939 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3364 [2020-07-21 22:22:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:20,945 INFO L225 Difference]: With dead ends: 156 [2020-07-21 22:22:20,945 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 22:22:20,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6741 GetRequests, 6672 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 22:22:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 22:22:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-07-21 22:22:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 22:22:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-21 22:22:20,964 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3364 [2020-07-21 22:22:20,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:20,966 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-21 22:22:20,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 22:22:20,966 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-21 22:22:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4616 [2020-07-21 22:22:21,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:21,091 INFO L422 BasicCegarLoop]: trace histogram [436, 436, 300, 273, 273, 218, 218, 218, 218, 218, 218, 218, 218, 136, 136, 136, 136, 136, 136, 136, 136, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:21,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:21,292 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:21,295 INFO L82 PathProgramCache]: Analyzing trace with hash -554675479, now seen corresponding path program 12 times [2020-07-21 22:22:21,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:21,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142440801] [2020-07-21 22:22:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:22,672 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:22:22,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:22,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 22:22:22,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 22920 refuted. 0 times theorem prover too weak. 665925 trivial. 0 not checked. [2020-07-21 22:22:29,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:34,436 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:22:34,540 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:22:35,732 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:22:35,842 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:22:35,949 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:22:37,574 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:22:37,693 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:22:37,819 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:22:37,940 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:22:38,075 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 22:22:38,190 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 22:22:38,301 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:22:38,402 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:22:55,753 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:22:55,862 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:22:55,968 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:22:57,112 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:22:57,221 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:22:57,338 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:22:57,457 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:22:57,572 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 22:22:57,693 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:22:58,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:08,868 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:23:11,654 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:23:11,763 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:23:11,872 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:23:11,976 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:23:12,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:29,262 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:23:29,469 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:23:29,574 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:23:30,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:37,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:42,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:44,328 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:23:45,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:45,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:48,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:50,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:51,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:52,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:52,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:52,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:52,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:52,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 23034 refuted. 0 times theorem prover too weak. 665811 trivial. 0 not checked. [2020-07-21 22:24:00,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142440801] [2020-07-21 22:24:00,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:00,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 34 [2020-07-21 22:24:00,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526536966] [2020-07-21 22:24:00,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 22:24:00,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:00,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 22:24:00,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 22:24:00,370 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 34 states. [2020-07-21 22:24:02,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:02,360 INFO L93 Difference]: Finished difference Result 161 states and 556 transitions. [2020-07-21 22:24:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 22:24:02,362 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 4615 [2020-07-21 22:24:02,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:02,370 INFO L225 Difference]: With dead ends: 161 [2020-07-21 22:24:02,370 INFO L226 Difference]: Without dead ends: 157 [2020-07-21 22:24:02,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9245 GetRequests, 9171 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 22:24:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-21 22:24:02,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-07-21 22:24:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 22:24:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2020-07-21 22:24:02,389 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 4615 [2020-07-21 22:24:02,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:02,391 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2020-07-21 22:24:02,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 22:24:02,392 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2020-07-21 22:24:02,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9330 [2020-07-21 22:24:02,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:02,882 INFO L422 BasicCegarLoop]: trace histogram [846, 846, 625, 533, 533, 423, 423, 423, 423, 423, 423, 423, 423, 359, 266, 266, 266, 266, 266, 266, 266, 221, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:03,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:03,091 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:03,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:03,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1670319822, now seen corresponding path program 6 times [2020-07-21 22:24:03,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:03,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737701889] [2020-07-21 22:24:03,095 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:05,126 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:24:05,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:05,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 5179 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 22:24:05,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2779097 backedges. 4429 proven. 49554 refuted. 0 times theorem prover too weak. 2725114 trivial. 0 not checked. [2020-07-21 22:24:34,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:39,028 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:24:39,134 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:24:39,242 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:24:39,350 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:24:41,010 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:24:41,125 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:24:41,247 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:24:41,369 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:24:45,121 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:24:45,241 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:24:45,372 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:24:45,507 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:24:51,468 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:24:51,603 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:24:51,752 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:24:51,897 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:24:52,041 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 22:24:52,172 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 22:24:52,291 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:24:52,408 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:24:52,525 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 22:24:52,634 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 22:24:52,741 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 22:25:56,351 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:25:56,456 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:25:56,566 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:25:56,676 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:25:57,633 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:25:57,748 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:25:57,875 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:25:57,995 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:25:59,988 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:26:00,120 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:26:00,260 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:26:00,400 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:26:04,717 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:26:04,858 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:26:05,009 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:26:05,157 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:26:05,305 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 22:26:05,442 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 22:26:05,572 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:26:05,700 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:26:05,820 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:26:05,929 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:26:06,033 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:26:06,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:06,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:47,949 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:26:48,069 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:26:48,196 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:26:48,314 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:26:50,477 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:26:50,613 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:26:50,757 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:26:50,900 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:26:51,046 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:26:51,185 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:26:51,309 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:26:51,429 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:26:51,544 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:26:51,648 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 22:26:51,759 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:26:52,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:11,559 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:27:11,676 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:27:11,798 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:27:11,923 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:27:13,040 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:27:13,164 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:27:13,300 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:27:13,433 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:27:13,564 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:27:13,687 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:27:13,801 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 22:27:13,913 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:27:14,016 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-21 22:27:14,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:22,612 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:22,716 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:22,828 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:22,939 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:23,536 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:27:23,654 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:27:23,778 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:27:23,901 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:27:24,023 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:27:24,135 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:27:24,241 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:27:24,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:24,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:29,971 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:27:30,074 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:27:30,502 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:30,610 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:30,724 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:30,835 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:30,947 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:27:31,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:35,745 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:27:36,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:39,306 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 22:27:41,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:43,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:45,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:46,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:46,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:46,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:46,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:46,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:46,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:47,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:47,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2779097 backedges. 4429 proven. 49674 refuted. 0 times theorem prover too weak. 2724994 trivial. 0 not checked. [2020-07-21 22:28:16,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737701889] [2020-07-21 22:28:16,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:28:16,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 34 [2020-07-21 22:28:16,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807954943] [2020-07-21 22:28:16,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 22:28:16,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:28:16,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 22:28:16,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 22:28:16,343 INFO L87 Difference]: Start difference. First operand 95 states and 219 transitions. Second operand 34 states. [2020-07-21 22:28:19,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:28:19,596 INFO L93 Difference]: Finished difference Result 166 states and 590 transitions. [2020-07-21 22:28:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 22:28:19,601 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 9329 [2020-07-21 22:28:19,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:28:19,613 INFO L225 Difference]: With dead ends: 166 [2020-07-21 22:28:19,613 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 22:28:19,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18672 GetRequests, 18598 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 22:28:19,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 22:28:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 95. [2020-07-21 22:28:19,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 22:28:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2020-07-21 22:28:19,637 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 9329 [2020-07-21 22:28:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:28:19,643 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2020-07-21 22:28:19,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 22:28:19,643 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2020-07-21 22:28:20,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8373 [2020-07-21 22:28:20,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:28:20,384 INFO L422 BasicCegarLoop]: trace histogram [745, 745, 542, 542, 474, 372, 372, 372, 372, 372, 372, 372, 372, 271, 271, 271, 271, 271, 271, 271, 271, 170, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:28:20,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:28:20,599 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:28:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:28:20,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1593629950, now seen corresponding path program 13 times [2020-07-21 22:28:20,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:28:20,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147732219] [2020-07-21 22:28:20,603 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:28:22,657 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:28:22,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:28:22,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 4662 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 22:28:22,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:28:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2222959 backedges. 4739 proven. 46423 refuted. 0 times theorem prover too weak. 2171797 trivial. 0 not checked. [2020-07-21 22:28:47,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:28:49,269 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:28:49,375 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:28:50,074 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:28:50,190 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:28:50,310 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:28:50,430 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:28:50,994 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:28:51,119 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:28:51,255 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:28:51,391 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:28:52,163 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:28:52,304 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:28:52,452 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:28:52,599 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:28:55,055 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:28:55,211 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:28:55,370 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:28:55,533 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:28:58,452 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:28:58,620 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:28:58,798 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:28:58,978 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:29:01,479 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:29:01,668 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:29:01,857 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 22:29:02,043 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 22:29:12,018 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 22:29:12,185 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 22:29:12,370 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:29:12,553 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:29:12,733 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-07-21 22:29:12,902 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 22:29:13,065 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 22:29:13,217 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 22:29:13,368 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:29:13,533 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:29:13,695 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:29:13,847 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:29:13,992 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:29:14,119 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:29:14,253 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:29:14,377 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:29:14,498 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:29:14,611 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:29:14,716 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:30:45,461 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:30:45,569 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:30:46,072 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:30:46,185 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:30:46,309 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:30:46,428 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:30:47,104 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:30:47,229 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:30:47,360 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:30:47,488 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:30:49,630 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:30:49,771 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:30:49,931 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:30:50,082 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:30:52,737 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:30:52,894 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:30:53,059 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:30:53,223 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:30:55,448 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:30:55,614 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:30:55,791 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 22:30:55,965 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 22:30:56,139 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 22:30:56,300 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-07-21 22:30:56,458 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 22:30:56,610 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 22:30:56,753 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 22:30:56,888 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:30:57,018 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 22:30:57,144 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:30:57,262 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 22:30:57,378 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:30:58,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:58,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:31:15,916 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:31:16,687 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:31:16,815 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:31:16,930 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:31:17,044 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:31:17,577 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:31:17,696 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:31:17,837 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:31:17,961 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:31:18,668 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:31:18,804 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:31:18,945 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:31:19,082 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:31:21,438 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:31:21,583 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 61