/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 DAGSIZE --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_10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:16:46,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:16:46,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:16:46,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 21:16:46,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:16:46,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:16:46,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:16:46,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:16:46,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:16:46,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:16:46,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:16:46,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:16:46,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:16:46,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:16:46,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:16:46,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:16:46,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:16:46,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:16:46,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:16:46,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:16:46,701 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:16:46,728 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:16:46,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:16:46,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:16:46,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:16:46,730 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:16:46,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:16:46,731 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:16:46,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:16:46,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:16:46,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:16:46,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:16:46,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:16:46,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:16:46,733 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:16:46,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:16:46,734 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:16:46,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:16:46,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:16:46,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:16:46,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:16:46,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:16:46,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:16:46,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:16:46,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:16:46,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:16:46,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:16:46,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:46,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:16:46,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:16:46,736 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 -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:16:47,064 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:16:47,078 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:16:47,081 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:16:47,083 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:16:47,083 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:16:47,084 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_10-2.c [2020-07-20 21:16:47,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/802421e34/fc878845a51b443484a1dce7362ed52a/FLAG079f92205 [2020-07-20 21:16:47,603 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:16:47,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_10-2.c [2020-07-20 21:16:47,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/802421e34/fc878845a51b443484a1dce7362ed52a/FLAG079f92205 [2020-07-20 21:16:48,002 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/802421e34/fc878845a51b443484a1dce7362ed52a [2020-07-20 21:16:48,017 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:16:48,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:16:48,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:16:48,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:16:48,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:16:48,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:16:48" (1/1) ... [2020-07-20 21:16:48,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d5cef09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:16:48, skipping insertion in model container [2020-07-20 21:16:48,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:16:48" (1/1) ... [2020-07-20 21:16:48,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:16:48,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:16:48,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:16:48,210 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:16:48,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:16:48,241 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:16:48,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:16:48 WrapperNode [2020-07-20 21:16:48,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:16:48,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:16:48,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:16:48,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:16:48,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:16:48" (1/1) ... [2020-07-20 21:16:48,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:16:48" (1/1) ... [2020-07-20 21:16:48,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:16:48" (1/1) ... [2020-07-20 21:16:48,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:16:48" (1/1) ... [2020-07-20 21:16:48,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:16:48" (1/1) ... [2020-07-20 21:16:48,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:16:48" (1/1) ... [2020-07-20 21:16:48,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:16:48" (1/1) ... [2020-07-20 21:16:48,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:16:48,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:16:48,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:16:48,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:16:48,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:16:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:16:48,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:16:48,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:16:48,425 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-20 21:16:48,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:16:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:16:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:16:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-20 21:16:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:16:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:16:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:16:48,634 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:16:48,634 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:16:48,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:16:48 BoogieIcfgContainer [2020-07-20 21:16:48,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:16:48,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:16:48,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:16:48,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:16:48,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:16:48" (1/3) ... [2020-07-20 21:16:48,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acf01f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:16:48, skipping insertion in model container [2020-07-20 21:16:48,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:16:48" (2/3) ... [2020-07-20 21:16:48,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acf01f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:16:48, skipping insertion in model container [2020-07-20 21:16:48,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:16:48" (3/3) ... [2020-07-20 21:16:48,655 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_10-2.c [2020-07-20 21:16:48,693 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:16:48,715 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:16:48,733 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:16:48,759 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:16:48,760 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:16:48,760 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:16:48,760 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:16:48,760 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:16:48,761 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:16:48,761 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:16:48,761 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:16:48,791 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 21:16:48,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 21:16:48,802 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:16:48,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:16:48,804 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:16:48,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:16:48,811 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-20 21:16:48,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:16:48,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311061995] [2020-07-20 21:16:48,822 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:48,887 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:16:48,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:16:48,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:16:48,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:16:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:16:48,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:16:48,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311061995] [2020-07-20 21:16:48,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:16:48,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:16:48,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505983860] [2020-07-20 21:16:49,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:16:49,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:16:49,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:16:49,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:16:49,016 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 21:16:49,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:16:49,136 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-20 21:16:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:16:49,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 21:16:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:16:49,149 INFO L225 Difference]: With dead ends: 35 [2020-07-20 21:16:49,149 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 21:16:49,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:16:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 21:16:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 21:16:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 21:16:49,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 21:16:49,209 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-20 21:16:49,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:16:49,210 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 21:16:49,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:16:49,210 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 21:16:49,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 21:16:49,212 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:16:49,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:16:49,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:49,418 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:16:49,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:16:49,418 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-20 21:16:49,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:16:49,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914909145] [2020-07-20 21:16:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:49,443 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:16:49,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:16:49,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:16:49,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:16:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:16:49,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:16:49,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914909145] [2020-07-20 21:16:49,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:16:49,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:16:49,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262302373] [2020-07-20 21:16:49,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:16:49,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:16:49,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:16:49,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:16:49,482 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-20 21:16:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:16:49,571 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-20 21:16:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:16:49,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 21:16:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:16:49,573 INFO L225 Difference]: With dead ends: 27 [2020-07-20 21:16:49,573 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 21:16:49,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:16:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 21:16:49,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 21:16:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 21:16:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 21:16:49,583 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-20 21:16:49,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:16:49,584 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 21:16:49,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:16:49,584 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 21:16:49,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 21:16:49,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:16:49,586 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:16:49,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:49,800 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:16:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:16:49,802 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-20 21:16:49,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:16:49,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091711710] [2020-07-20 21:16:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:49,846 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:16:49,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:16:49,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:16:49,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:16:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:16:49,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:16:50,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 21:16:50,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091711710] [2020-07-20 21:16:50,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:16:50,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 21:16:50,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132609275] [2020-07-20 21:16:50,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 21:16:50,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:16:50,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 21:16:50,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:16:50,203 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 21:16:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:16:50,315 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-20 21:16:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:16:50,316 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 21:16:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:16:50,318 INFO L225 Difference]: With dead ends: 32 [2020-07-20 21:16:50,318 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 21:16:50,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:16:50,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 21:16:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 21:16:50,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 21:16:50,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 21:16:50,328 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-20 21:16:50,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:16:50,329 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 21:16:50,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 21:16:50,329 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 21:16:50,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:16:50,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:16:50,331 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:16:50,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:50,546 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:16:50,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:16:50,547 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-20 21:16:50,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:16:50,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893349246] [2020-07-20 21:16:50,549 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:50,581 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:16:50,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:16:50,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:16:50,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:16:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 21:16:50,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:16:50,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 21:16:50,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893349246] [2020-07-20 21:16:50,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:16:50,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 21:16:50,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002990252] [2020-07-20 21:16:50,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 21:16:50,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:16:50,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 21:16:50,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:16:50,811 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-20 21:16:50,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:16:50,889 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-20 21:16:50,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:16:50,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 21:16:50,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:16:50,892 INFO L225 Difference]: With dead ends: 37 [2020-07-20 21:16:50,893 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 21:16:50,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:16:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 21:16:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-20 21:16:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 21:16:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 21:16:50,903 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-20 21:16:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:16:50,904 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 21:16:50,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 21:16:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 21:16:50,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 21:16:50,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:16:50,906 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:16:51,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:51,119 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:16:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:16:51,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-20 21:16:51,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:16:51,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214805181] [2020-07-20 21:16:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:51,167 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:16:51,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:16:51,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:16:51,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:16:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:16:51,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:16:51,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:51,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:51,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:51,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 21:16:51,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214805181] [2020-07-20 21:16:51,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:16:51,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 21:16:51,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16161823] [2020-07-20 21:16:51,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 21:16:51,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:16:51,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 21:16:51,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:16:51,557 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-20 21:16:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:16:51,748 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-20 21:16:51,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:16:51,748 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 21:16:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:16:51,752 INFO L225 Difference]: With dead ends: 42 [2020-07-20 21:16:51,752 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 21:16:51,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:16:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 21:16:51,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-20 21:16:51,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 21:16:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 21:16:51,763 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-20 21:16:51,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:16:51,764 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 21:16:51,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 21:16:51,764 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 21:16:51,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 21:16:51,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:16:51,766 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:16:51,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:51,973 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:16:51,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:16:51,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-20 21:16:51,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:16:51,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699171147] [2020-07-20 21:16:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:52,026 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:16:52,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:16:52,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:16:52,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:16:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 21:16:52,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:16:52,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:52,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:52,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 21:16:52,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699171147] [2020-07-20 21:16:52,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:16:52,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 21:16:52,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053539951] [2020-07-20 21:16:52,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 21:16:52,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:16:52,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 21:16:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:16:52,402 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-20 21:16:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:16:52,559 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-20 21:16:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:16:52,560 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 21:16:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:16:52,567 INFO L225 Difference]: With dead ends: 47 [2020-07-20 21:16:52,568 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 21:16:52,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:16:52,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 21:16:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-20 21:16:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 21:16:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 21:16:52,595 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-20 21:16:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:16:52,595 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 21:16:52,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 21:16:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 21:16:52,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 21:16:52,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:16:52,601 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:16:52,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:52,803 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:16:52,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:16:52,804 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-20 21:16:52,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:16:52,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548309754] [2020-07-20 21:16:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:52,847 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:16:52,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:16:52,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:16:52,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:16:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 21:16:52,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:16:53,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:53,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:53,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:53,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:53,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 21:16:53,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548309754] [2020-07-20 21:16:53,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:16:53,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 21:16:53,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085165936] [2020-07-20 21:16:53,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 21:16:53,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:16:53,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 21:16:53,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:16:53,566 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-20 21:16:53,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:16:53,743 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-20 21:16:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:16:53,744 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 21:16:53,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:16:53,747 INFO L225 Difference]: With dead ends: 52 [2020-07-20 21:16:53,747 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 21:16:53,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:16:53,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 21:16:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-20 21:16:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 21:16:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 21:16:53,760 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-20 21:16:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:16:53,761 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 21:16:53,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 21:16:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 21:16:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-20 21:16:53,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:16:53,764 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:16:53,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:53,978 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:16:53,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:16:53,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-20 21:16:53,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:16:53,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513007137] [2020-07-20 21:16:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:54,034 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:16:54,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:16:54,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:16:54,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:16:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-20 21:16:54,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:16:54,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:54,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:54,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:54,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-20 21:16:54,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513007137] [2020-07-20 21:16:54,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:16:54,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 21:16:54,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443060603] [2020-07-20 21:16:54,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 21:16:54,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:16:54,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 21:16:54,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:16:54,765 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-20 21:16:54,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:16:54,913 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-20 21:16:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:16:54,916 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-20 21:16:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:16:54,919 INFO L225 Difference]: With dead ends: 57 [2020-07-20 21:16:54,919 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 21:16:54,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:16:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 21:16:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-20 21:16:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 21:16:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 21:16:54,933 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-20 21:16:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:16:54,934 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 21:16:54,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 21:16:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 21:16:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 21:16:54,936 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:16:54,937 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:16:55,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:55,151 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:16:55,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:16:55,152 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-20 21:16:55,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:16:55,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308253232] [2020-07-20 21:16:55,154 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:55,217 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:16:55,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:16:55,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:16:55,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:16:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-20 21:16:55,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:16:55,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:55,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:56,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:56,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:56,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-20 21:16:56,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308253232] [2020-07-20 21:16:56,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:16:56,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 21:16:56,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770620814] [2020-07-20 21:16:56,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:16:56,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:16:56,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:16:56,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:16:56,282 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-20 21:16:56,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:16:56,574 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-20 21:16:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:16:56,575 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-20 21:16:56,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:16:56,578 INFO L225 Difference]: With dead ends: 62 [2020-07-20 21:16:56,578 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 21:16:56,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:16:56,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 21:16:56,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-20 21:16:56,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 21:16:56,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 21:16:56,592 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-20 21:16:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:16:56,593 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 21:16:56,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:16:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 21:16:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-20 21:16:56,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:16:56,596 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:16:56,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:56,811 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:16:56,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:16:56,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-20 21:16:56,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:16:56,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375308731] [2020-07-20 21:16:56,813 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:56,900 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:16:56,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:16:56,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:16:56,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:16:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 506 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-07-20 21:16:56,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:16:57,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:57,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:58,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:58,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:58,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:58,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:16:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 532 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2020-07-20 21:16:58,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375308731] [2020-07-20 21:16:58,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:16:58,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 21:16:58,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161715382] [2020-07-20 21:16:58,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:16:58,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:16:58,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:16:58,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:16:58,114 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-20 21:16:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:16:58,297 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-20 21:16:58,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:16:58,298 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-20 21:16:58,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:16:58,303 INFO L225 Difference]: With dead ends: 67 [2020-07-20 21:16:58,303 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 21:16:58,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:16:58,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 21:16:58,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-20 21:16:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 21:16:58,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 21:16:58,338 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-20 21:16:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:16:58,339 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 21:16:58,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:16:58,339 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 21:16:58,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-20 21:16:58,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:16:58,345 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:16:58,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:58,547 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:16:58,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:16:58,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-20 21:16:58,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:16:58,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162433270] [2020-07-20 21:16:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:16:58,671 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:16:58,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:16:58,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:16:58,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:16:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-20 21:16:58,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:17:00,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:00,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:00,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:00,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:00,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:00,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-20 21:17:00,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162433270] [2020-07-20 21:17:00,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:17:00,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 21:17:00,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058032662] [2020-07-20 21:17:00,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:17:00,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:17:00,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:17:00,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:17:00,764 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-20 21:17:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:17:00,998 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-20 21:17:00,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:17:00,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-20 21:17:01,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:17:01,003 INFO L225 Difference]: With dead ends: 72 [2020-07-20 21:17:01,003 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 21:17:01,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:17:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 21:17:01,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-20 21:17:01,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 21:17:01,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 21:17:01,016 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-20 21:17:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:17:01,017 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 21:17:01,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:17:01,017 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 21:17:01,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-20 21:17:01,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:17:01,022 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:17:01,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:01,238 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:17:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:17:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1006419304, now seen corresponding path program 5 times [2020-07-20 21:17:01,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:17:01,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49505527] [2020-07-20 21:17:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:01,378 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:17:01,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:17:01,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:17:01,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:17:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-20 21:17:01,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:17:02,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:03,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:03,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:03,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:03,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:03,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-20 21:17:03,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49505527] [2020-07-20 21:17:03,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:17:03,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 21:17:03,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50701575] [2020-07-20 21:17:03,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:17:03,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:17:03,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:17:03,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:17:03,493 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-20 21:17:03,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:17:03,704 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-20 21:17:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:17:03,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 299 [2020-07-20 21:17:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:17:03,712 INFO L225 Difference]: With dead ends: 77 [2020-07-20 21:17:03,712 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 21:17:03,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:17:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 21:17:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-20 21:17:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 21:17:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 21:17:03,737 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-20 21:17:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:17:03,738 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 21:17:03,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:17:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 21:17:03,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-20 21:17:03,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:17:03,752 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 39, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:17:03,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:03,966 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:17:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:17:03,967 INFO L82 PathProgramCache]: Analyzing trace with hash 785285043, now seen corresponding path program 6 times [2020-07-20 21:17:03,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:17:03,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811413547] [2020-07-20 21:17:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:04,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:17:04,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:17:04,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:17:04,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:17:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2126 refuted. 0 times theorem prover too weak. 12702 trivial. 0 not checked. [2020-07-20 21:17:04,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:17:06,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:06,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:07,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:07,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:07,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:07,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:07,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:07,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2177 refuted. 0 times theorem prover too weak. 12651 trivial. 0 not checked. [2020-07-20 21:17:07,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811413547] [2020-07-20 21:17:07,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:17:07,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 21:17:07,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985432450] [2020-07-20 21:17:07,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:17:07,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:17:07,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:17:07,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:17:07,855 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-20 21:17:08,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:17:08,308 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-20 21:17:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:17:08,309 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 507 [2020-07-20 21:17:08,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:17:08,313 INFO L225 Difference]: With dead ends: 82 [2020-07-20 21:17:08,313 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 21:17:08,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 983 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:17:08,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 21:17:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-20 21:17:08,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 21:17:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-20 21:17:08,328 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 507 [2020-07-20 21:17:08,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:17:08,329 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-20 21:17:08,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:17:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-20 21:17:08,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-20 21:17:08,332 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:17:08,333 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 53, 32, 32, 32, 32, 32, 32, 32, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:17:08,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:08,547 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:17:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:17:08,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1350718391, now seen corresponding path program 6 times [2020-07-20 21:17:08,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:17:08,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675848598] [2020-07-20 21:17:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:08,773 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:17:08,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:17:08,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:17:08,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:17:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1918 refuted. 0 times theorem prover too weak. 9431 trivial. 0 not checked. [2020-07-20 21:17:09,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:17:10,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:11,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:11,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:11,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:11,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:11,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:11,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:11,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:11,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1975 refuted. 0 times theorem prover too weak. 9374 trivial. 0 not checked. [2020-07-20 21:17:12,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675848598] [2020-07-20 21:17:12,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:17:12,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 21:17:12,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262836021] [2020-07-20 21:17:12,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:17:12,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:17:12,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:17:12,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:17:12,129 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-20 21:17:12,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:17:12,420 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-20 21:17:12,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:17:12,421 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 450 [2020-07-20 21:17:12,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:17:12,425 INFO L225 Difference]: With dead ends: 87 [2020-07-20 21:17:12,425 INFO L226 Difference]: Without dead ends: 83 [2020-07-20 21:17:12,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 868 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:17:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-20 21:17:12,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-20 21:17:12,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 21:17:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-20 21:17:12,440 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 450 [2020-07-20 21:17:12,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:17:12,441 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-20 21:17:12,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:17:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-20 21:17:12,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2020-07-20 21:17:12,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:17:12,458 INFO L422 BasicCegarLoop]: trace histogram [163, 163, 82, 81, 81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:17:12,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:12,672 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:17:12,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:17:12,673 INFO L82 PathProgramCache]: Analyzing trace with hash 40336450, now seen corresponding path program 7 times [2020-07-20 21:17:12,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:17:12,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840366164] [2020-07-20 21:17:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:13,132 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:17:13,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:17:13,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 2013 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:17:13,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:17:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 69012 backedges. 797 proven. 5632 refuted. 0 times theorem prover too weak. 62583 trivial. 0 not checked. [2020-07-20 21:17:13,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:17:17,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:17,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:18,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:19,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:19,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:19,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:19,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:19,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:19,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:19,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:19,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:19,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 69012 backedges. 797 proven. 5702 refuted. 0 times theorem prover too weak. 62513 trivial. 0 not checked. [2020-07-20 21:17:20,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840366164] [2020-07-20 21:17:20,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:17:20,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 21:17:20,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826640135] [2020-07-20 21:17:20,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:17:20,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:17:20,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:17:20,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:17:20,467 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-20 21:17:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:17:21,132 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-20 21:17:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:17:21,133 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1066 [2020-07-20 21:17:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:17:21,137 INFO L225 Difference]: With dead ends: 92 [2020-07-20 21:17:21,137 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 21:17:21,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2140 GetRequests, 2097 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:17:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 21:17:21,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-20 21:17:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 21:17:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-20 21:17:21,164 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1066 [2020-07-20 21:17:21,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:17:21,168 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-20 21:17:21,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:17:21,168 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-20 21:17:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2020-07-20 21:17:21,175 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:17:21,175 INFO L422 BasicCegarLoop]: trace histogram [95, 95, 79, 47, 47, 47, 47, 47, 47, 47, 32, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:17:21,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:21,389 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:17:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:17:21,389 INFO L82 PathProgramCache]: Analyzing trace with hash -312379166, now seen corresponding path program 7 times [2020-07-20 21:17:21,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:17:21,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91416930] [2020-07-20 21:17:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:21,688 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:17:21,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:17:21,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1225 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:17:21,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:17:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 25265 backedges. 501 proven. 3394 refuted. 0 times theorem prover too weak. 21370 trivial. 0 not checked. [2020-07-20 21:17:21,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:17:24,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:24,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:25,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:26,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:26,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:26,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:26,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:26,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:26,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:26,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25265 backedges. 501 proven. 3471 refuted. 0 times theorem prover too weak. 21293 trivial. 0 not checked. [2020-07-20 21:17:27,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91416930] [2020-07-20 21:17:27,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:17:27,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 21:17:27,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978464678] [2020-07-20 21:17:27,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:17:27,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:17:27,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:17:27,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:17:27,155 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 21 states. [2020-07-20 21:17:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:17:27,634 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-20 21:17:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:17:27,635 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 656 [2020-07-20 21:17:27,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:17:27,640 INFO L225 Difference]: With dead ends: 97 [2020-07-20 21:17:27,640 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 21:17:27,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1319 GetRequests, 1276 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:17:27,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 21:17:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-20 21:17:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 21:17:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-20 21:17:27,655 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 656 [2020-07-20 21:17:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:17:27,656 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-20 21:17:27,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:17:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-20 21:17:27,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2020-07-20 21:17:27,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:17:27,671 INFO L422 BasicCegarLoop]: trace histogram [195, 195, 98, 97, 97, 97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:17:27,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:27,885 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:17:27,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:17:27,886 INFO L82 PathProgramCache]: Analyzing trace with hash 971855614, now seen corresponding path program 8 times [2020-07-20 21:17:27,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:17:27,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941710316] [2020-07-20 21:17:27,887 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:28,404 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:17:28,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:17:28,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 2405 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:17:28,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:17:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 98940 backedges. 1168 proven. 7570 refuted. 0 times theorem prover too weak. 90202 trivial. 0 not checked. [2020-07-20 21:17:29,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:17:33,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:35,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:36,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:36,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:36,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:37,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:37,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:37,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:37,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:37,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:37,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:37,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 98940 backedges. 1168 proven. 7662 refuted. 0 times theorem prover too weak. 90110 trivial. 0 not checked. [2020-07-20 21:17:38,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941710316] [2020-07-20 21:17:38,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:17:38,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-20 21:17:38,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878792406] [2020-07-20 21:17:38,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 21:17:38,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:17:38,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 21:17:38,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:17:38,295 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 23 states. [2020-07-20 21:17:39,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:17:39,042 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-20 21:17:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:17:39,043 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1274 [2020-07-20 21:17:39,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:17:39,048 INFO L225 Difference]: With dead ends: 102 [2020-07-20 21:17:39,048 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 21:17:39,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2557 GetRequests, 2509 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-20 21:17:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 21:17:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-20 21:17:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 21:17:39,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-20 21:17:39,065 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1274 [2020-07-20 21:17:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:17:39,067 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-20 21:17:39,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 21:17:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-20 21:17:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1901 [2020-07-20 21:17:39,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:17:39,108 INFO L422 BasicCegarLoop]: trace histogram [279, 279, 219, 139, 139, 139, 139, 139, 139, 139, 80, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:17:39,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:39,323 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:17:39,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:17:39,323 INFO L82 PathProgramCache]: Analyzing trace with hash -112815412, now seen corresponding path program 8 times [2020-07-20 21:17:39,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:17:39,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912968562] [2020-07-20 21:17:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:40,052 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:17:40,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:17:40,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 3551 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:17:40,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:17:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 217359 backedges. 1595 proven. 11933 refuted. 0 times theorem prover too weak. 203831 trivial. 0 not checked. [2020-07-20 21:17:41,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:17:48,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:50,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:50,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:51,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:51,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:51,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:52,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:52,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:52,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:52,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:52,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:17:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 217359 backedges. 1595 proven. 12033 refuted. 0 times theorem prover too weak. 203731 trivial. 0 not checked. [2020-07-20 21:17:54,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912968562] [2020-07-20 21:17:54,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:17:54,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 21:17:54,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807440492] [2020-07-20 21:17:54,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:17:54,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:17:54,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:17:54,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:17:54,023 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 22 states. [2020-07-20 21:17:54,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:17:54,832 INFO L93 Difference]: Finished difference Result 107 states and 432 transitions. [2020-07-20 21:17:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:17:54,833 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1900 [2020-07-20 21:17:54,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:17:54,840 INFO L225 Difference]: With dead ends: 107 [2020-07-20 21:17:54,840 INFO L226 Difference]: Without dead ends: 103 [2020-07-20 21:17:54,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3808 GetRequests, 3760 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 21:17:54,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-20 21:17:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2020-07-20 21:17:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 21:17:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-20 21:17:54,857 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1900 [2020-07-20 21:17:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:17:54,858 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-20 21:17:54,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:17:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-20 21:17:54,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2029 [2020-07-20 21:17:54,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:17:54,891 INFO L422 BasicCegarLoop]: trace histogram [311, 311, 156, 155, 155, 155, 155, 155, 155, 155, 155, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:17:55,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:55,103 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:17:55,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:17:55,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2013442466, now seen corresponding path program 9 times [2020-07-20 21:17:55,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:17:55,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246294629] [2020-07-20 21:17:55,105 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:17:55,855 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:17:55,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:17:55,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 3823 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 21:17:55,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:17:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 252495 backedges. 2059 proven. 13739 refuted. 0 times theorem prover too weak. 236697 trivial. 0 not checked. [2020-07-20 21:17:57,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:18:04,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:08,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:10,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:10,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:10,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:11,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:11,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:11,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:11,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:12,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:12,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:12,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 252495 backedges. 2059 proven. 13856 refuted. 0 times theorem prover too weak. 236580 trivial. 0 not checked. [2020-07-20 21:18:13,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246294629] [2020-07-20 21:18:13,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:18:13,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-20 21:18:13,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956728858] [2020-07-20 21:18:13,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:18:13,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:18:13,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:18:13,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:18:13,728 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 24 states. [2020-07-20 21:18:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:18:14,885 INFO L93 Difference]: Finished difference Result 112 states and 474 transitions. [2020-07-20 21:18:14,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:18:14,886 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 2028 [2020-07-20 21:18:14,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:18:14,892 INFO L225 Difference]: With dead ends: 112 [2020-07-20 21:18:14,893 INFO L226 Difference]: Without dead ends: 108 [2020-07-20 21:18:14,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4066 GetRequests, 4013 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 21:18:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-20 21:18:14,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-07-20 21:18:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 21:18:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-20 21:18:14,910 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 2028 [2020-07-20 21:18:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:18:14,912 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-20 21:18:14,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:18:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-20 21:18:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3145 [2020-07-20 21:18:14,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:18:14,982 INFO L422 BasicCegarLoop]: trace histogram [461, 461, 371, 230, 230, 230, 230, 230, 230, 230, 141, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:18:15,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:18:15,183 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:18:15,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:18:15,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1076189233, now seen corresponding path program 9 times [2020-07-20 21:18:15,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:18:15,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661104502] [2020-07-20 21:18:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:18:16,276 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:18:16,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:18:16,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 5872 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 21:18:16,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:18:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 598095 backedges. 3449 proven. 22734 refuted. 0 times theorem prover too weak. 571912 trivial. 0 not checked. [2020-07-20 21:18:20,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:18:30,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:35,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:35,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:38,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:39,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:40,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:40,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:40,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:41,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:41,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:41,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:41,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 598095 backedges. 3459 proven. 22841 refuted. 0 times theorem prover too weak. 571795 trivial. 0 not checked. [2020-07-20 21:18:44,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661104502] [2020-07-20 21:18:44,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:18:44,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-20 21:18:44,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703704918] [2020-07-20 21:18:44,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:18:44,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:18:44,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:18:44,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:18:44,411 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 24 states. [2020-07-20 21:18:45,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:18:45,031 INFO L93 Difference]: Finished difference Result 289 states and 3051 transitions. [2020-07-20 21:18:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:18:45,032 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 3144 [2020-07-20 21:18:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:18:45,043 INFO L225 Difference]: With dead ends: 289 [2020-07-20 21:18:45,044 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 21:18:45,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6297 GetRequests, 6244 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 21:18:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 21:18:45,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-07-20 21:18:45,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 21:18:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 140 transitions. [2020-07-20 21:18:45,081 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 140 transitions. Word has length 3144 [2020-07-20 21:18:45,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:18:45,082 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 140 transitions. [2020-07-20 21:18:45,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:18:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 140 transitions. [2020-07-20 21:18:45,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1349 [2020-07-20 21:18:45,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:18:45,101 INFO L422 BasicCegarLoop]: trace histogram [195, 195, 171, 97, 97, 97, 97, 97, 97, 97, 74, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:18:45,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:18:45,315 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:18:45,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:18:45,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1267777752, now seen corresponding path program 10 times [2020-07-20 21:18:45,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:18:45,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418152913] [2020-07-20 21:18:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:18:45,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:18:45,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:18:45,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 2513 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:18:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:18:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 108819 backedges. 1506 proven. 7976 refuted. 0 times theorem prover too weak. 99337 trivial. 0 not checked. [2020-07-20 21:18:46,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:18:51,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:53,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:55,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:55,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:56,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:56,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:56,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:56,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:56,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:56,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:56,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:56,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:56,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:56,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:18:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 108819 backedges. 1530 proven. 8054 refuted. 0 times theorem prover too weak. 99235 trivial. 0 not checked. [2020-07-20 21:18:57,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418152913] [2020-07-20 21:18:57,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:18:57,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 21:18:57,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830290824] [2020-07-20 21:18:57,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:18:57,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:18:57,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:18:57,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:18:57,336 INFO L87 Difference]: Start difference. First operand 85 states and 140 transitions. Second operand 22 states. [2020-07-20 21:18:57,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:18:57,963 INFO L93 Difference]: Finished difference Result 294 states and 697 transitions. [2020-07-20 21:18:57,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:18:57,965 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1348 [2020-07-20 21:18:57,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:18:57,972 INFO L225 Difference]: With dead ends: 294 [2020-07-20 21:18:57,972 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 21:18:57,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2704 GetRequests, 2656 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 21:18:57,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 21:18:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-07-20 21:18:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 21:18:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 117 transitions. [2020-07-20 21:18:58,016 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 117 transitions. Word has length 1348 [2020-07-20 21:18:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:18:58,017 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 117 transitions. [2020-07-20 21:18:58,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:18:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 117 transitions. [2020-07-20 21:18:58,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2020-07-20 21:18:58,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:18:58,044 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:18:58,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:18:58,259 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:18:58,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:18:58,259 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 11 times [2020-07-20 21:18:58,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:18:58,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892046121] [2020-07-20 21:18:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:18:58,966 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:18:58,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:18:58,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 711 conjunts are in the unsatisfiable core [2020-07-20 21:18:59,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:19:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2020-07-20 21:19:00,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:19:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2020-07-20 21:19:24,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892046121] [2020-07-20 21:19:24,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:19:24,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 40 [2020-07-20 21:19:24,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103150675] [2020-07-20 21:19:24,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 21:19:24,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:19:24,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 21:19:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 21:19:24,891 INFO L87 Difference]: Start difference. First operand 82 states and 117 transitions. Second operand 40 states. [2020-07-20 21:19:26,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:19:26,228 INFO L93 Difference]: Finished difference Result 173 states and 302 transitions. [2020-07-20 21:19:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-20 21:19:26,230 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1212 [2020-07-20 21:19:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:19:26,237 INFO L225 Difference]: With dead ends: 173 [2020-07-20 21:19:26,238 INFO L226 Difference]: Without dead ends: 166 [2020-07-20 21:19:26,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2425 GetRequests, 2339 SyntacticMatches, 46 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=103, Invalid=1619, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 21:19:26,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-20 21:19:26,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 137. [2020-07-20 21:19:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-20 21:19:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 245 transitions. [2020-07-20 21:19:26,268 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 245 transitions. Word has length 1212 [2020-07-20 21:19:26,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:19:26,269 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 245 transitions. [2020-07-20 21:19:26,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 21:19:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 245 transitions. [2020-07-20 21:19:26,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1502 [2020-07-20 21:19:26,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:19:26,295 INFO L422 BasicCegarLoop]: trace histogram [223, 223, 156, 111, 111, 111, 111, 111, 111, 111, 67, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:19:26,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:19:26,510 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:19:26,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:19:26,511 INFO L82 PathProgramCache]: Analyzing trace with hash -164779600, now seen corresponding path program 12 times [2020-07-20 21:19:26,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:19:26,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468580872] [2020-07-20 21:19:26,512 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:19:27,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:19:27,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:19:27,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 2817 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 21:19:27,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:19:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 135522 backedges. 2296 proven. 9424 refuted. 0 times theorem prover too weak. 123802 trivial. 0 not checked. [2020-07-20 21:19:28,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:19:34,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:34,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:37,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:37,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:39,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:39,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:40,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:40,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:40,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:40,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:40,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:41,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:41,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:41,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:41,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:41,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 135522 backedges. 2304 proven. 9542 refuted. 0 times theorem prover too weak. 123676 trivial. 0 not checked. [2020-07-20 21:19:42,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468580872] [2020-07-20 21:19:42,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:19:42,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-20 21:19:42,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882583188] [2020-07-20 21:19:42,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:19:42,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:19:42,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:19:42,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:19:42,482 INFO L87 Difference]: Start difference. First operand 137 states and 245 transitions. Second operand 24 states. [2020-07-20 21:19:42,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:19:42,974 INFO L93 Difference]: Finished difference Result 221 states and 404 transitions. [2020-07-20 21:19:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:19:42,976 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1501 [2020-07-20 21:19:42,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:19:42,983 INFO L225 Difference]: With dead ends: 221 [2020-07-20 21:19:42,983 INFO L226 Difference]: Without dead ends: 174 [2020-07-20 21:19:42,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3011 GetRequests, 2958 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 21:19:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-07-20 21:19:43,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 147. [2020-07-20 21:19:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-20 21:19:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 269 transitions. [2020-07-20 21:19:43,017 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 269 transitions. Word has length 1501 [2020-07-20 21:19:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:19:43,018 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 269 transitions. [2020-07-20 21:19:43,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:19:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 269 transitions. [2020-07-20 21:19:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1471 [2020-07-20 21:19:43,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:19:43,050 INFO L422 BasicCegarLoop]: trace histogram [219, 219, 149, 109, 109, 109, 109, 109, 109, 109, 70, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:19:43,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:19:43,265 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:19:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:19:43,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1522282996, now seen corresponding path program 13 times [2020-07-20 21:19:43,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:19:43,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448560880] [2020-07-20 21:19:43,267 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:19:44,172 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:19:44,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:19:44,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 2759 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 21:19:44,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:19:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 130054 backedges. 1813 proven. 10050 refuted. 0 times theorem prover too weak. 118191 trivial. 0 not checked. [2020-07-20 21:19:45,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:19:51,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:54,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:56,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:56,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:57,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:57,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:57,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:58,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:58,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:58,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:58,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:58,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:58,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:58,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:19:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 130054 backedges. 1825 proven. 10155 refuted. 0 times theorem prover too weak. 118074 trivial. 0 not checked. [2020-07-20 21:19:59,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448560880] [2020-07-20 21:19:59,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:19:59,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-20 21:19:59,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786628049] [2020-07-20 21:19:59,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:19:59,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:19:59,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:19:59,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:19:59,554 INFO L87 Difference]: Start difference. First operand 147 states and 269 transitions. Second operand 24 states. [2020-07-20 21:20:00,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:20:00,368 INFO L93 Difference]: Finished difference Result 411 states and 914 transitions. [2020-07-20 21:20:00,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:20:00,370 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1470 [2020-07-20 21:20:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:20:00,375 INFO L225 Difference]: With dead ends: 411 [2020-07-20 21:20:00,375 INFO L226 Difference]: Without dead ends: 147 [2020-07-20 21:20:00,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2949 GetRequests, 2896 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 21:20:00,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-20 21:20:00,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2020-07-20 21:20:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-20 21:20:00,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 235 transitions. [2020-07-20 21:20:00,425 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 235 transitions. Word has length 1470 [2020-07-20 21:20:00,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:20:00,426 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 235 transitions. [2020-07-20 21:20:00,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:20:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 235 transitions. [2020-07-20 21:20:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1249 [2020-07-20 21:20:00,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:20:00,446 INFO L422 BasicCegarLoop]: trace histogram [183, 183, 143, 91, 91, 91, 91, 91, 91, 91, 52, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:20:00,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:20:00,661 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:20:00,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:20:00,661 INFO L82 PathProgramCache]: Analyzing trace with hash -855545534, now seen corresponding path program 14 times [2020-07-20 21:20:00,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:20:00,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445909996] [2020-07-20 21:20:00,662 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:20:01,474 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:20:01,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:20:01,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 2333 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:20:01,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:20:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 93145 backedges. 1858 proven. 5253 refuted. 0 times theorem prover too weak. 86034 trivial. 0 not checked. [2020-07-20 21:20:02,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:20:07,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:09,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:10,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:10,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:10,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:10,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:10,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:10,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:10,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:10,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:10,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:10,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:10,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 93145 backedges. 1870 proven. 5298 refuted. 0 times theorem prover too weak. 85977 trivial. 0 not checked. [2020-07-20 21:20:11,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445909996] [2020-07-20 21:20:11,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:20:11,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 21:20:11,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259761625] [2020-07-20 21:20:11,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:20:11,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:20:11,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:20:11,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:20:11,865 INFO L87 Difference]: Start difference. First operand 141 states and 235 transitions. Second operand 20 states. [2020-07-20 21:20:12,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:20:12,201 INFO L93 Difference]: Finished difference Result 193 states and 329 transitions. [2020-07-20 21:20:12,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:20:12,202 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 1248 [2020-07-20 21:20:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:20:12,207 INFO L225 Difference]: With dead ends: 193 [2020-07-20 21:20:12,207 INFO L226 Difference]: Without dead ends: 171 [2020-07-20 21:20:12,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2502 GetRequests, 2462 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:20:12,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-20 21:20:12,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 147. [2020-07-20 21:20:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-20 21:20:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 243 transitions. [2020-07-20 21:20:12,235 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 243 transitions. Word has length 1248 [2020-07-20 21:20:12,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:20:12,236 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 243 transitions. [2020-07-20 21:20:12,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:20:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 243 transitions. [2020-07-20 21:20:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1381 [2020-07-20 21:20:12,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:20:12,261 INFO L422 BasicCegarLoop]: trace histogram [205, 205, 143, 102, 102, 102, 102, 102, 102, 102, 62, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:20:12,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:20:12,477 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:20:12,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:20:12,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1855993729, now seen corresponding path program 15 times [2020-07-20 21:20:12,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:20:12,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680561161] [2020-07-20 21:20:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:20:13,343 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:20:13,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:20:13,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 2586 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:20:13,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:20:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 114397 backedges. 1833 proven. 7135 refuted. 0 times theorem prover too weak. 105429 trivial. 0 not checked. [2020-07-20 21:20:14,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:20:16,259 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 21:20:20,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:22,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:23,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:24,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:24,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:24,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:24,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:24,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:25,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:25,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:25,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 114397 backedges. 1844 proven. 7196 refuted. 0 times theorem prover too weak. 105357 trivial. 0 not checked. [2020-07-20 21:20:26,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680561161] [2020-07-20 21:20:26,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:20:26,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:20:26,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287079539] [2020-07-20 21:20:26,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:20:26,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:20:26,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:20:26,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:20:26,080 INFO L87 Difference]: Start difference. First operand 147 states and 243 transitions. Second operand 22 states. [2020-07-20 21:20:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:20:26,548 INFO L93 Difference]: Finished difference Result 211 states and 350 transitions. [2020-07-20 21:20:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:20:26,550 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1380 [2020-07-20 21:20:26,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:20:26,557 INFO L225 Difference]: With dead ends: 211 [2020-07-20 21:20:26,558 INFO L226 Difference]: Without dead ends: 184 [2020-07-20 21:20:26,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2767 GetRequests, 2722 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:20:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-20 21:20:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 147. [2020-07-20 21:20:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-20 21:20:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 243 transitions. [2020-07-20 21:20:26,600 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 243 transitions. Word has length 1380 [2020-07-20 21:20:26,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:20:26,600 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 243 transitions. [2020-07-20 21:20:26,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:20:26,601 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 243 transitions. [2020-07-20 21:20:26,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1237 [2020-07-20 21:20:26,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:20:26,636 INFO L422 BasicCegarLoop]: trace histogram [181, 181, 143, 90, 90, 90, 90, 90, 90, 90, 53, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:20:26,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:20:26,851 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:20:26,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:20:26,852 INFO L82 PathProgramCache]: Analyzing trace with hash 128354797, now seen corresponding path program 16 times [2020-07-20 21:20:26,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:20:26,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135782336] [2020-07-20 21:20:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:20:27,706 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:20:27,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:20:27,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:20:27,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:20:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 91333 backedges. 1958 proven. 6050 refuted. 0 times theorem prover too weak. 83325 trivial. 0 not checked. [2020-07-20 21:20:29,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:20:35,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:35,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:37,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:38,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:38,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:38,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:39,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:39,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:39,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:39,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:39,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:39,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:39,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 91333 backedges. 1965 proven. 6115 refuted. 0 times theorem prover too weak. 83253 trivial. 0 not checked. [2020-07-20 21:20:40,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135782336] [2020-07-20 21:20:40,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:20:40,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:20:40,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635185445] [2020-07-20 21:20:40,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:20:40,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:20:40,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:20:40,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:20:40,620 INFO L87 Difference]: Start difference. First operand 147 states and 243 transitions. Second operand 22 states. [2020-07-20 21:20:41,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:20:41,009 INFO L93 Difference]: Finished difference Result 207 states and 341 transitions. [2020-07-20 21:20:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:20:41,010 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1236 [2020-07-20 21:20:41,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:20:41,015 INFO L225 Difference]: With dead ends: 207 [2020-07-20 21:20:41,015 INFO L226 Difference]: Without dead ends: 185 [2020-07-20 21:20:41,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2479 GetRequests, 2434 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:20:41,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-07-20 21:20:41,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 170. [2020-07-20 21:20:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-20 21:20:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 291 transitions. [2020-07-20 21:20:41,046 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 291 transitions. Word has length 1236 [2020-07-20 21:20:41,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:20:41,047 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 291 transitions. [2020-07-20 21:20:41,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:20:41,047 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 291 transitions. [2020-07-20 21:20:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1348 [2020-07-20 21:20:41,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:20:41,073 INFO L422 BasicCegarLoop]: trace histogram [199, 199, 146, 99, 99, 99, 99, 99, 99, 99, 53, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:20:41,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:20:41,289 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:20:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:20:41,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1182459838, now seen corresponding path program 17 times [2020-07-20 21:20:41,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:20:41,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18273135] [2020-07-20 21:20:41,291 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:20:42,173 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:20:42,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:20:42,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 2523 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:20:42,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:20:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 108793 backedges. 2239 proven. 7190 refuted. 0 times theorem prover too weak. 99364 trivial. 0 not checked. [2020-07-20 21:20:42,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:20:49,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:51,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:53,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:53,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:54,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:54,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:54,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:54,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:54,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:54,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:54,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:54,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:54,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:20:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 108793 backedges. 2257 proven. 7274 refuted. 0 times theorem prover too weak. 99262 trivial. 0 not checked. [2020-07-20 21:20:56,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18273135] [2020-07-20 21:20:56,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:20:56,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 21:20:56,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041637278] [2020-07-20 21:20:56,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:20:56,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:20:56,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:20:56,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:20:56,004 INFO L87 Difference]: Start difference. First operand 170 states and 291 transitions. Second operand 22 states. [2020-07-20 21:20:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:20:56,512 INFO L93 Difference]: Finished difference Result 271 states and 466 transitions. [2020-07-20 21:20:56,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:20:56,513 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1347 [2020-07-20 21:20:56,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:20:56,520 INFO L225 Difference]: With dead ends: 271 [2020-07-20 21:20:56,521 INFO L226 Difference]: Without dead ends: 249 [2020-07-20 21:20:56,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2702 GetRequests, 2654 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 21:20:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-07-20 21:20:56,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 165. [2020-07-20 21:20:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-07-20 21:20:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 281 transitions. [2020-07-20 21:20:56,570 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 281 transitions. Word has length 1347 [2020-07-20 21:20:56,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:20:56,570 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 281 transitions. [2020-07-20 21:20:56,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:20:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 281 transitions. [2020-07-20 21:20:56,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1393 [2020-07-20 21:20:56,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:20:56,607 INFO L422 BasicCegarLoop]: trace histogram [207, 207, 143, 103, 103, 103, 103, 103, 103, 103, 64, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:20:56,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:20:56,821 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:20:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:20:56,822 INFO L82 PathProgramCache]: Analyzing trace with hash -726491848, now seen corresponding path program 18 times [2020-07-20 21:20:56,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:20:56,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347294040] [2020-07-20 21:20:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:20:57,787 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:20:57,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:20:57,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 2609 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:20:57,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:20:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 116449 backedges. 2232 proven. 6816 refuted. 0 times theorem prover too weak. 107401 trivial. 0 not checked. [2020-07-20 21:20:58,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:21:05,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:05,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:07,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:07,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:08,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:08,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:09,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:09,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:09,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:09,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:10,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:10,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:10,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:10,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 116449 backedges. 2241 proven. 6879 refuted. 0 times theorem prover too weak. 107329 trivial. 0 not checked. [2020-07-20 21:21:11,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347294040] [2020-07-20 21:21:11,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:21:11,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:21:11,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704304780] [2020-07-20 21:21:11,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:21:11,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:21:11,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:21:11,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:21:11,667 INFO L87 Difference]: Start difference. First operand 165 states and 281 transitions. Second operand 22 states. [2020-07-20 21:21:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:21:12,139 INFO L93 Difference]: Finished difference Result 270 states and 473 transitions. [2020-07-20 21:21:12,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:21:12,141 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1392 [2020-07-20 21:21:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:21:12,146 INFO L225 Difference]: With dead ends: 270 [2020-07-20 21:21:12,147 INFO L226 Difference]: Without dead ends: 233 [2020-07-20 21:21:12,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2791 GetRequests, 2746 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:21:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-07-20 21:21:12,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 178. [2020-07-20 21:21:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-07-20 21:21:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 307 transitions. [2020-07-20 21:21:12,184 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 307 transitions. Word has length 1392 [2020-07-20 21:21:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:21:12,184 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 307 transitions. [2020-07-20 21:21:12,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:21:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 307 transitions. [2020-07-20 21:21:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1297 [2020-07-20 21:21:12,205 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:21:12,206 INFO L422 BasicCegarLoop]: trace histogram [191, 191, 143, 95, 95, 95, 95, 95, 95, 95, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:21:12,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:21:12,419 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:21:12,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:21:12,420 INFO L82 PathProgramCache]: Analyzing trace with hash 112608514, now seen corresponding path program 19 times [2020-07-20 21:21:12,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:21:12,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212054644] [2020-07-20 21:21:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:21:13,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:21:13,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:21:13,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 2425 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:21:13,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:21:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 100593 backedges. 1636 proven. 6772 refuted. 0 times theorem prover too weak. 92185 trivial. 0 not checked. [2020-07-20 21:21:14,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:21:20,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:20,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:22,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:22,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:24,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:24,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:24,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:25,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:25,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:25,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:25,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:25,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:25,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:25,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:25,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 100593 backedges. 1649 proven. 6831 refuted. 0 times theorem prover too weak. 92113 trivial. 0 not checked. [2020-07-20 21:21:26,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212054644] [2020-07-20 21:21:26,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:21:26,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:21:26,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082364129] [2020-07-20 21:21:26,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:21:26,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:21:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:21:26,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:21:26,670 INFO L87 Difference]: Start difference. First operand 178 states and 307 transitions. Second operand 22 states. [2020-07-20 21:21:27,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:21:27,097 INFO L93 Difference]: Finished difference Result 225 states and 388 transitions. [2020-07-20 21:21:27,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:21:27,098 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1296 [2020-07-20 21:21:27,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:21:27,103 INFO L225 Difference]: With dead ends: 225 [2020-07-20 21:21:27,103 INFO L226 Difference]: Without dead ends: 193 [2020-07-20 21:21:27,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2599 GetRequests, 2554 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:21:27,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-07-20 21:21:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 175. [2020-07-20 21:21:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-07-20 21:21:27,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 300 transitions. [2020-07-20 21:21:27,135 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 300 transitions. Word has length 1296 [2020-07-20 21:21:27,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:21:27,136 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 300 transitions. [2020-07-20 21:21:27,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:21:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 300 transitions. [2020-07-20 21:21:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1321 [2020-07-20 21:21:27,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:21:27,159 INFO L422 BasicCegarLoop]: trace histogram [195, 195, 143, 97, 97, 97, 97, 97, 97, 97, 52, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:21:27,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:21:27,373 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:21:27,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:21:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash 280263098, now seen corresponding path program 20 times [2020-07-20 21:21:27,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:21:27,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122608441] [2020-07-20 21:21:27,374 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:21:28,374 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:21:28,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:21:28,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 2471 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 21:21:28,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:21:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 104437 backedges. 1576 proven. 8016 refuted. 0 times theorem prover too weak. 94845 trivial. 0 not checked. [2020-07-20 21:21:29,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:21:31,836 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-07-20 21:21:36,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:39,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:41,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:42,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:42,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:42,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:43,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:43,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:43,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:43,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:43,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:43,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 104437 backedges. 1580 proven. 8104 refuted. 0 times theorem prover too weak. 94753 trivial. 0 not checked. [2020-07-20 21:21:44,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122608441] [2020-07-20 21:21:44,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:21:44,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-20 21:21:44,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229736454] [2020-07-20 21:21:44,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:21:44,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:21:44,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:21:44,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:21:44,327 INFO L87 Difference]: Start difference. First operand 175 states and 300 transitions. Second operand 24 states. [2020-07-20 21:21:45,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:21:45,006 INFO L93 Difference]: Finished difference Result 376 states and 692 transitions. [2020-07-20 21:21:45,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:21:45,011 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1320 [2020-07-20 21:21:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:21:45,018 INFO L225 Difference]: With dead ends: 376 [2020-07-20 21:21:45,018 INFO L226 Difference]: Without dead ends: 172 [2020-07-20 21:21:45,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2648 GetRequests, 2598 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 21:21:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-20 21:21:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-07-20 21:21:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-20 21:21:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 276 transitions. [2020-07-20 21:21:45,056 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 276 transitions. Word has length 1320 [2020-07-20 21:21:45,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:21:45,056 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 276 transitions. [2020-07-20 21:21:45,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:21:45,057 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 276 transitions. [2020-07-20 21:21:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1309 [2020-07-20 21:21:45,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:21:45,084 INFO L422 BasicCegarLoop]: trace histogram [193, 193, 143, 96, 96, 96, 96, 96, 96, 96, 50, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:21:45,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:21:45,300 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:21:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:21:45,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1795950953, now seen corresponding path program 21 times [2020-07-20 21:21:45,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:21:45,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558652042] [2020-07-20 21:21:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:21:46,319 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:21:46,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:21:46,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 2448 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 21:21:46,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:21:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 102505 backedges. 1893 proven. 7609 refuted. 0 times theorem prover too weak. 93003 trivial. 0 not checked. [2020-07-20 21:21:47,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:21:54,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:57,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:21:59,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:00,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:00,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:01,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:01,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:01,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:01,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:01,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:01,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:01,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:01,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 102505 backedges. 1893 proven. 7701 refuted. 0 times theorem prover too weak. 92911 trivial. 0 not checked. [2020-07-20 21:22:02,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558652042] [2020-07-20 21:22:02,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:22:02,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-20 21:22:02,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978825968] [2020-07-20 21:22:02,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:22:02,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:22:02,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:22:02,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:22:02,865 INFO L87 Difference]: Start difference. First operand 172 states and 276 transitions. Second operand 24 states. [2020-07-20 21:22:03,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:22:03,409 INFO L93 Difference]: Finished difference Result 232 states and 364 transitions. [2020-07-20 21:22:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:22:03,411 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1308 [2020-07-20 21:22:03,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:22:03,416 INFO L225 Difference]: With dead ends: 232 [2020-07-20 21:22:03,416 INFO L226 Difference]: Without dead ends: 205 [2020-07-20 21:22:03,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2624 GetRequests, 2574 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 21:22:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-20 21:22:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 167. [2020-07-20 21:22:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-07-20 21:22:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 265 transitions. [2020-07-20 21:22:03,447 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 265 transitions. Word has length 1308 [2020-07-20 21:22:03,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:22:03,447 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 265 transitions. [2020-07-20 21:22:03,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:22:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 265 transitions. [2020-07-20 21:22:03,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1321 [2020-07-20 21:22:03,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:22:03,469 INFO L422 BasicCegarLoop]: trace histogram [195, 195, 143, 97, 97, 97, 97, 97, 97, 97, 52, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:22:03,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:22:03,682 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:22:03,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:22:03,683 INFO L82 PathProgramCache]: Analyzing trace with hash 410937846, now seen corresponding path program 22 times [2020-07-20 21:22:03,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:22:03,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258672373] [2020-07-20 21:22:03,684 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:22:04,753 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:22:04,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:22:04,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 2471 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 21:22:04,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:22:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 104437 backedges. 2224 proven. 7368 refuted. 0 times theorem prover too weak. 94845 trivial. 0 not checked. [2020-07-20 21:22:05,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:22:13,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:16,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:16,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:18,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:18,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:19,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:19,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:19,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:19,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:20,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:20,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:20,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:20,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:20,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:20,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:20,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 104437 backedges. 2222 proven. 7462 refuted. 0 times theorem prover too weak. 94753 trivial. 0 not checked. [2020-07-20 21:22:22,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258672373] [2020-07-20 21:22:22,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:22:22,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-20 21:22:22,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269718105] [2020-07-20 21:22:22,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:22:22,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:22:22,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:22:22,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:22:22,105 INFO L87 Difference]: Start difference. First operand 167 states and 265 transitions. Second operand 24 states. [2020-07-20 21:22:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:22:22,753 INFO L93 Difference]: Finished difference Result 289 states and 459 transitions. [2020-07-20 21:22:22,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:22:22,755 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1320 [2020-07-20 21:22:22,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:22:22,763 INFO L225 Difference]: With dead ends: 289 [2020-07-20 21:22:22,763 INFO L226 Difference]: Without dead ends: 252 [2020-07-20 21:22:22,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2648 GetRequests, 2598 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 21:22:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-20 21:22:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 141. [2020-07-20 21:22:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-20 21:22:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 219 transitions. [2020-07-20 21:22:22,795 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 219 transitions. Word has length 1320 [2020-07-20 21:22:22,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:22:22,796 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 219 transitions. [2020-07-20 21:22:22,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:22:22,796 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 219 transitions. [2020-07-20 21:22:22,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1261 [2020-07-20 21:22:22,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:22:22,816 INFO L422 BasicCegarLoop]: trace histogram [185, 185, 143, 92, 92, 92, 92, 92, 92, 92, 51, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:22:23,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:22:23,030 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:22:23,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:22:23,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1980343529, now seen corresponding path program 23 times [2020-07-20 21:22:23,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:22:23,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617818674] [2020-07-20 21:22:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:22:24,098 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:22:24,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:22:24,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 2356 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:22:24,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:22:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 94977 backedges. 2614 proven. 5554 refuted. 0 times theorem prover too weak. 86809 trivial. 0 not checked. [2020-07-20 21:22:24,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:22:25,347 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 21:22:31,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:31,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:34,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:35,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:35,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:35,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:36,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:36,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:36,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:36,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:36,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:37,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 94977 backedges. 2617 proven. 5623 refuted. 0 times theorem prover too weak. 86737 trivial. 0 not checked. [2020-07-20 21:22:38,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617818674] [2020-07-20 21:22:38,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:22:38,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:22:38,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407045940] [2020-07-20 21:22:38,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:22:38,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:22:38,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:22:38,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:22:38,737 INFO L87 Difference]: Start difference. First operand 141 states and 219 transitions. Second operand 22 states. [2020-07-20 21:22:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:22:39,218 INFO L93 Difference]: Finished difference Result 175 states and 262 transitions. [2020-07-20 21:22:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:22:39,220 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1260 [2020-07-20 21:22:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:22:39,225 INFO L225 Difference]: With dead ends: 175 [2020-07-20 21:22:39,225 INFO L226 Difference]: Without dead ends: 158 [2020-07-20 21:22:39,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2527 GetRequests, 2482 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:22:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-20 21:22:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2020-07-20 21:22:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-20 21:22:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 228 transitions. [2020-07-20 21:22:39,248 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 228 transitions. Word has length 1260 [2020-07-20 21:22:39,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:22:39,249 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 228 transitions. [2020-07-20 21:22:39,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:22:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 228 transitions. [2020-07-20 21:22:39,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1251 [2020-07-20 21:22:39,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:22:39,269 INFO L422 BasicCegarLoop]: trace histogram [183, 183, 145, 91, 91, 91, 91, 91, 91, 91, 54, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:22:39,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:22:39,482 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:22:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:22:39,483 INFO L82 PathProgramCache]: Analyzing trace with hash 748869956, now seen corresponding path program 24 times [2020-07-20 21:22:39,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:22:39,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760112705] [2020-07-20 21:22:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:22:40,610 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:22:40,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:22:40,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2339 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:22:40,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:22:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 93432 backedges. 2657 proven. 6075 refuted. 0 times theorem prover too weak. 84700 trivial. 0 not checked. [2020-07-20 21:22:41,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:22:49,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:49,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:52,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:52,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:53,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:53,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:54,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:54,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:54,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:54,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:54,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:54,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:55,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:55,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:22:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 93432 backedges. 2673 proven. 6161 refuted. 0 times theorem prover too weak. 84598 trivial. 0 not checked. [2020-07-20 21:22:57,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760112705] [2020-07-20 21:22:57,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:22:57,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 21:22:57,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761658177] [2020-07-20 21:22:57,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:22:57,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:22:57,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:22:57,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:22:57,035 INFO L87 Difference]: Start difference. First operand 149 states and 228 transitions. Second operand 22 states. [2020-07-20 21:22:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:22:57,579 INFO L93 Difference]: Finished difference Result 242 states and 371 transitions. [2020-07-20 21:22:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:22:57,581 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1250 [2020-07-20 21:22:57,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:22:57,587 INFO L225 Difference]: With dead ends: 242 [2020-07-20 21:22:57,587 INFO L226 Difference]: Without dead ends: 225 [2020-07-20 21:22:57,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2508 GetRequests, 2460 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 21:22:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-20 21:22:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-07-20 21:22:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-07-20 21:22:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 257 transitions. [2020-07-20 21:22:57,616 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 257 transitions. Word has length 1250 [2020-07-20 21:22:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:22:57,617 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 257 transitions. [2020-07-20 21:22:57,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:22:57,617 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 257 transitions. [2020-07-20 21:22:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1261 [2020-07-20 21:22:57,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:22:57,634 INFO L422 BasicCegarLoop]: trace histogram [185, 185, 143, 92, 92, 92, 92, 92, 92, 92, 51, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:22:57,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:22:57,848 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:22:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:22:57,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1516095275, now seen corresponding path program 25 times [2020-07-20 21:22:57,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:22:57,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416326246] [2020-07-20 21:22:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:22:58,953 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:22:58,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:22:58,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 2356 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:22:58,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:22:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 94977 backedges. 2494 proven. 5674 refuted. 0 times theorem prover too weak. 86809 trivial. 0 not checked. [2020-07-20 21:22:59,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:23:07,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:09,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:10,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:10,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:11,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:11,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:11,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:11,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:11,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:11,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:12,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:12,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:12,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 94977 backedges. 2501 proven. 5739 refuted. 0 times theorem prover too weak. 86737 trivial. 0 not checked. [2020-07-20 21:23:14,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416326246] [2020-07-20 21:23:14,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:23:14,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:23:14,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637964131] [2020-07-20 21:23:14,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:23:14,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:23:14,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:23:14,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:23:14,202 INFO L87 Difference]: Start difference. First operand 164 states and 257 transitions. Second operand 22 states. [2020-07-20 21:23:14,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:23:14,724 INFO L93 Difference]: Finished difference Result 292 states and 464 transitions. [2020-07-20 21:23:14,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:23:14,727 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1260 [2020-07-20 21:23:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:23:14,733 INFO L225 Difference]: With dead ends: 292 [2020-07-20 21:23:14,733 INFO L226 Difference]: Without dead ends: 265 [2020-07-20 21:23:14,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2527 GetRequests, 2482 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:23:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-07-20 21:23:14,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 182. [2020-07-20 21:23:14,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-20 21:23:14,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 286 transitions. [2020-07-20 21:23:14,769 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 286 transitions. Word has length 1260 [2020-07-20 21:23:14,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:23:14,769 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 286 transitions. [2020-07-20 21:23:14,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:23:14,770 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 286 transitions. [2020-07-20 21:23:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1273 [2020-07-20 21:23:14,786 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:23:14,787 INFO L422 BasicCegarLoop]: trace histogram [187, 187, 143, 93, 93, 93, 93, 93, 93, 93, 50, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:23:15,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:23:15,003 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:23:15,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:23:15,004 INFO L82 PathProgramCache]: Analyzing trace with hash -494582400, now seen corresponding path program 26 times [2020-07-20 21:23:15,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:23:15,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105748378] [2020-07-20 21:23:15,005 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:23:16,124 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:23:16,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:23:16,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 2379 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 21:23:16,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:23:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 96829 backedges. 2820 proven. 6412 refuted. 0 times theorem prover too weak. 87597 trivial. 0 not checked. [2020-07-20 21:23:16,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:23:20,088 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-07-20 21:23:25,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:29,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:29,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:30,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:30,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:31,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:31,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:31,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:31,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:32,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:32,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:32,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:32,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:32,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 96829 backedges. 2816 proven. 6508 refuted. 0 times theorem prover too weak. 87505 trivial. 0 not checked. [2020-07-20 21:23:34,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105748378] [2020-07-20 21:23:34,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:23:34,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-20 21:23:34,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757856652] [2020-07-20 21:23:34,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:23:34,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:23:34,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:23:34,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:23:34,858 INFO L87 Difference]: Start difference. First operand 182 states and 286 transitions. Second operand 24 states. [2020-07-20 21:23:35,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:23:35,578 INFO L93 Difference]: Finished difference Result 361 states and 572 transitions. [2020-07-20 21:23:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:23:35,580 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1272 [2020-07-20 21:23:35,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:23:35,588 INFO L225 Difference]: With dead ends: 361 [2020-07-20 21:23:35,588 INFO L226 Difference]: Without dead ends: 334 [2020-07-20 21:23:35,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2552 GetRequests, 2502 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 21:23:35,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-07-20 21:23:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 146. [2020-07-20 21:23:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-20 21:23:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 223 transitions. [2020-07-20 21:23:35,623 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 223 transitions. Word has length 1272 [2020-07-20 21:23:35,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:23:35,624 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 223 transitions. [2020-07-20 21:23:35,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:23:35,624 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 223 transitions. [2020-07-20 21:23:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-20 21:23:35,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:23:35,637 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:23:35,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:23:35,844 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:23:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:23:35,845 INFO L82 PathProgramCache]: Analyzing trace with hash 27658092, now seen corresponding path program 27 times [2020-07-20 21:23:35,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:23:35,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533566215] [2020-07-20 21:23:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:23:37,068 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:23:37,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:23:37,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:23:37,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:23:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 5621 proven. 2307 refuted. 0 times theorem prover too weak. 81613 trivial. 0 not checked. [2020-07-20 21:23:37,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:23:40,662 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-07-20 21:23:42,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:44,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:46,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:46,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:46,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:46,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:47,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:47,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:47,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:47,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:47,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:48,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:23:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 5620 proven. 2380 refuted. 0 times theorem prover too weak. 81541 trivial. 0 not checked. [2020-07-20 21:23:54,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533566215] [2020-07-20 21:23:54,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:23:54,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:23:54,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273279056] [2020-07-20 21:23:54,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:23:54,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:23:54,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:23:54,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:23:54,243 INFO L87 Difference]: Start difference. First operand 146 states and 223 transitions. Second operand 22 states. [2020-07-20 21:23:54,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:23:54,782 INFO L93 Difference]: Finished difference Result 180 states and 263 transitions. [2020-07-20 21:23:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:23:54,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1224 [2020-07-20 21:23:54,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:23:54,786 INFO L225 Difference]: With dead ends: 180 [2020-07-20 21:23:54,786 INFO L226 Difference]: Without dead ends: 173 [2020-07-20 21:23:54,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2455 GetRequests, 2410 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:23:54,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-20 21:23:54,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 164. [2020-07-20 21:23:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-07-20 21:23:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 246 transitions. [2020-07-20 21:23:54,808 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 246 transitions. Word has length 1224 [2020-07-20 21:23:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:23:54,809 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 246 transitions. [2020-07-20 21:23:54,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:23:54,810 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 246 transitions. [2020-07-20 21:23:54,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1237 [2020-07-20 21:23:54,825 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:23:54,826 INFO L422 BasicCegarLoop]: trace histogram [181, 181, 143, 90, 90, 90, 90, 90, 90, 90, 53, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:23:55,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:23:55,041 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:23:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:23:55,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1835411967, now seen corresponding path program 28 times [2020-07-20 21:23:55,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:23:55,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432069039] [2020-07-20 21:23:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:23:56,206 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:23:56,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:23:56,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 21:23:56,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:23:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 91333 backedges. 1557 proven. 7405 refuted. 0 times theorem prover too weak. 82371 trivial. 0 not checked. [2020-07-20 21:23:57,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:24:00,784 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-07-20 21:24:07,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:10,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:10,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:13,435 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-07-20 21:24:13,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:13,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:15,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:15,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:15,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:16,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:16,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:16,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:16,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:16,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:16,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:17,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 91333 backedges. 1559 proven. 7495 refuted. 0 times theorem prover too weak. 82279 trivial. 0 not checked. [2020-07-20 21:24:17,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432069039] [2020-07-20 21:24:17,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:24:17,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-20 21:24:17,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437111623] [2020-07-20 21:24:17,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:24:17,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:24:17,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:24:17,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:24:17,748 INFO L87 Difference]: Start difference. First operand 164 states and 246 transitions. Second operand 24 states. [2020-07-20 21:24:18,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:24:18,497 INFO L93 Difference]: Finished difference Result 187 states and 273 transitions. [2020-07-20 21:24:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:24:18,500 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1236 [2020-07-20 21:24:18,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:24:18,503 INFO L225 Difference]: With dead ends: 187 [2020-07-20 21:24:18,503 INFO L226 Difference]: Without dead ends: 155 [2020-07-20 21:24:18,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2480 GetRequests, 2430 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 21:24:18,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-20 21:24:18,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 136. [2020-07-20 21:24:18,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 21:24:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 202 transitions. [2020-07-20 21:24:18,524 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 202 transitions. Word has length 1236 [2020-07-20 21:24:18,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:24:18,525 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 202 transitions. [2020-07-20 21:24:18,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:24:18,525 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 202 transitions. [2020-07-20 21:24:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1214 [2020-07-20 21:24:18,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:24:18,537 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 144, 88, 88, 88, 88, 88, 88, 88, 56, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:24:18,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:24:18,738 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:24:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:24:18,739 INFO L82 PathProgramCache]: Analyzing trace with hash 493369557, now seen corresponding path program 29 times [2020-07-20 21:24:18,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:24:18,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015361927] [2020-07-20 21:24:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:24:19,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:24:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:24:19,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 2270 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:24:19,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:24:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 87912 backedges. 5851 proven. 2614 refuted. 0 times theorem prover too weak. 79447 trivial. 0 not checked. [2020-07-20 21:24:20,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:24:23,712 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:24:23,821 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:24:27,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:27,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:29,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:29,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:31,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:32,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:32,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:33,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:33,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:33,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:33,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:34,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:34,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:34,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:35,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 87912 backedges. 5863 proven. 2704 refuted. 0 times theorem prover too weak. 79345 trivial. 0 not checked. [2020-07-20 21:24:41,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015361927] [2020-07-20 21:24:41,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:24:41,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 21:24:41,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918206506] [2020-07-20 21:24:41,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:24:41,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:24:41,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:24:41,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:24:41,847 INFO L87 Difference]: Start difference. First operand 136 states and 202 transitions. Second operand 22 states. [2020-07-20 21:24:42,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:24:42,818 INFO L93 Difference]: Finished difference Result 276 states and 424 transitions. [2020-07-20 21:24:42,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:24:42,822 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1213 [2020-07-20 21:24:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:24:42,828 INFO L225 Difference]: With dead ends: 276 [2020-07-20 21:24:42,829 INFO L226 Difference]: Without dead ends: 264 [2020-07-20 21:24:42,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2434 GetRequests, 2386 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 21:24:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-20 21:24:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 199. [2020-07-20 21:24:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-20 21:24:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 302 transitions. [2020-07-20 21:24:42,865 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 302 transitions. Word has length 1213 [2020-07-20 21:24:42,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:24:42,866 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 302 transitions. [2020-07-20 21:24:42,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:24:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 302 transitions. [2020-07-20 21:24:42,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-20 21:24:42,887 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:24:42,888 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:24:43,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:24:43,101 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:24:43,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:24:43,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1018676894, now seen corresponding path program 30 times [2020-07-20 21:24:43,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:24:43,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238793091] [2020-07-20 21:24:43,102 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:24:44,341 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:24:44,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:24:44,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 2287 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:24:44,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:24:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 5501 proven. 2427 refuted. 0 times theorem prover too weak. 81613 trivial. 0 not checked. [2020-07-20 21:24:45,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:24:49,163 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-07-20 21:24:51,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:51,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:53,998 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 21:24:54,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:56,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:56,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:57,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:57,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:58,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:58,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:58,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:24:58,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:00,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 5504 proven. 2496 refuted. 0 times theorem prover too weak. 81541 trivial. 0 not checked. [2020-07-20 21:25:07,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238793091] [2020-07-20 21:25:07,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:25:07,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:25:07,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068036580] [2020-07-20 21:25:07,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:25:07,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:25:07,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:25:07,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:25:07,932 INFO L87 Difference]: Start difference. First operand 199 states and 302 transitions. Second operand 22 states. [2020-07-20 21:25:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:25:08,980 INFO L93 Difference]: Finished difference Result 444 states and 681 transitions. [2020-07-20 21:25:08,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:25:08,984 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1224 [2020-07-20 21:25:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:25:08,998 INFO L225 Difference]: With dead ends: 444 [2020-07-20 21:25:08,999 INFO L226 Difference]: Without dead ends: 432 [2020-07-20 21:25:09,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2455 GetRequests, 2410 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:25:09,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-07-20 21:25:09,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 227. [2020-07-20 21:25:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-07-20 21:25:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 344 transitions. [2020-07-20 21:25:09,056 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 344 transitions. Word has length 1224 [2020-07-20 21:25:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:25:09,057 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 344 transitions. [2020-07-20 21:25:09,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:25:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 344 transitions. [2020-07-20 21:25:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-20 21:25:09,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:25:09,072 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:25:09,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:25:09,273 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:25:09,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:25:09,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1991897758, now seen corresponding path program 31 times [2020-07-20 21:25:09,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:25:09,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296363442] [2020-07-20 21:25:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:25:10,546 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:25:10,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:25:10,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 2287 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 21:25:10,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:25:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 6141 proven. 2731 refuted. 0 times theorem prover too weak. 80669 trivial. 0 not checked. [2020-07-20 21:25:11,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:25:15,288 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 21:25:15,394 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 21:25:15,503 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:25:15,667 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-07-20 21:25:19,178 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-07-20 21:25:19,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:19,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:23,029 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-20 21:25:23,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:23,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:25,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:25,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:27,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:27,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:28,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:28,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:28,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:28,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:29,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:29,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:29,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:29,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:31,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 6133 proven. 2831 refuted. 0 times theorem prover too weak. 80577 trivial. 0 not checked. [2020-07-20 21:25:39,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296363442] [2020-07-20 21:25:39,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:25:39,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-20 21:25:39,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520559519] [2020-07-20 21:25:39,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:25:39,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:25:39,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:25:39,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:25:39,216 INFO L87 Difference]: Start difference. First operand 227 states and 344 transitions. Second operand 24 states. [2020-07-20 21:25:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:25:40,754 INFO L93 Difference]: Finished difference Result 640 states and 992 transitions. [2020-07-20 21:25:40,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:25:40,758 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1224 [2020-07-20 21:25:40,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:25:40,780 INFO L225 Difference]: With dead ends: 640 [2020-07-20 21:25:40,781 INFO L226 Difference]: Without dead ends: 618 [2020-07-20 21:25:40,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2456 GetRequests, 2406 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 21:25:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-07-20 21:25:40,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 199. [2020-07-20 21:25:40,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-20 21:25:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 299 transitions. [2020-07-20 21:25:40,847 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 299 transitions. Word has length 1224 [2020-07-20 21:25:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:25:40,848 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 299 transitions. [2020-07-20 21:25:40,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:25:40,848 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 299 transitions. [2020-07-20 21:25:40,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1214 [2020-07-20 21:25:40,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:25:40,867 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 144, 88, 88, 88, 88, 88, 88, 88, 56, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:25:41,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:25:41,068 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:25:41,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:25:41,069 INFO L82 PathProgramCache]: Analyzing trace with hash -922732837, now seen corresponding path program 32 times [2020-07-20 21:25:41,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:25:41,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564547501] [2020-07-20 21:25:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:25:42,386 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:25:42,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:25:42,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 2270 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:25:42,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:25:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 87912 backedges. 3725 proven. 4740 refuted. 0 times theorem prover too weak. 79447 trivial. 0 not checked. [2020-07-20 21:25:43,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:25:45,106 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 21:25:46,546 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:25:47,663 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:25:47,770 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:25:47,885 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:25:47,995 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:25:48,106 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:25:57,537 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:25:57,642 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:25:58,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:25:58,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:00,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:03,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:03,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:05,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:05,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:06,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:06,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:06,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:06,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:06,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:06,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:07,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 87912 backedges. 3739 proven. 4828 refuted. 0 times theorem prover too weak. 79345 trivial. 0 not checked. [2020-07-20 21:26:13,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564547501] [2020-07-20 21:26:13,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:26:13,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 21:26:13,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026364051] [2020-07-20 21:26:13,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:26:13,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:26:13,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:26:13,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:26:13,573 INFO L87 Difference]: Start difference. First operand 199 states and 299 transitions. Second operand 22 states. [2020-07-20 21:26:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:26:14,687 INFO L93 Difference]: Finished difference Result 332 states and 503 transitions. [2020-07-20 21:26:14,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:26:14,694 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1213 [2020-07-20 21:26:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:26:14,702 INFO L225 Difference]: With dead ends: 332 [2020-07-20 21:26:14,702 INFO L226 Difference]: Without dead ends: 320 [2020-07-20 21:26:14,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2434 GetRequests, 2386 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 21:26:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-07-20 21:26:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 199. [2020-07-20 21:26:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-20 21:26:14,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 299 transitions. [2020-07-20 21:26:14,743 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 299 transitions. Word has length 1213 [2020-07-20 21:26:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:26:14,744 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 299 transitions. [2020-07-20 21:26:14,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:26:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 299 transitions. [2020-07-20 21:26:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-20 21:26:14,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:26:14,766 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:26:14,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:26:14,982 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:26:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:26:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash 18860194, now seen corresponding path program 33 times [2020-07-20 21:26:14,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:26:14,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096061040] [2020-07-20 21:26:14,984 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:26:16,353 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:26:16,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:26:16,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 2287 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:26:16,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:26:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 3535 proven. 4393 refuted. 0 times theorem prover too weak. 81613 trivial. 0 not checked. [2020-07-20 21:26:17,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:26:20,311 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:26:20,416 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:26:21,911 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:26:22,059 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:26:22,221 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:26:22,360 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:26:22,468 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 21:26:22,571 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:26:22,990 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 21:26:32,184 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:26:32,288 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:26:32,395 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:26:32,511 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:26:32,623 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:26:32,726 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:26:33,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:35,603 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-07-20 21:26:35,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:35,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:38,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:39,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:40,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:41,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:41,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:41,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:42,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:26:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 3540 proven. 4460 refuted. 0 times theorem prover too weak. 81541 trivial. 0 not checked. [2020-07-20 21:26:48,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096061040] [2020-07-20 21:26:48,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:26:48,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:26:48,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112517934] [2020-07-20 21:26:48,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:26:48,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:26:48,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:26:48,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:26:48,362 INFO L87 Difference]: Start difference. First operand 199 states and 299 transitions. Second operand 22 states. [2020-07-20 21:26:49,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:26:49,659 INFO L93 Difference]: Finished difference Result 373 states and 563 transitions. [2020-07-20 21:26:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:26:49,666 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1224 [2020-07-20 21:26:49,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:26:49,676 INFO L225 Difference]: With dead ends: 373 [2020-07-20 21:26:49,677 INFO L226 Difference]: Without dead ends: 361 [2020-07-20 21:26:49,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2455 GetRequests, 2410 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:26:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-07-20 21:26:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 199. [2020-07-20 21:26:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-20 21:26:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 299 transitions. [2020-07-20 21:26:49,724 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 299 transitions. Word has length 1224 [2020-07-20 21:26:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:26:49,725 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 299 transitions. [2020-07-20 21:26:49,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:26:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 299 transitions. [2020-07-20 21:26:49,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-20 21:26:49,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:26:49,751 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:26:49,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:26:49,964 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:26:49,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:26:49,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1313694558, now seen corresponding path program 34 times [2020-07-20 21:26:49,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:26:49,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536649961] [2020-07-20 21:26:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:26:51,392 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:26:51,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:26:51,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 2287 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 21:26:51,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:26:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 3931 proven. 4941 refuted. 0 times theorem prover too weak. 80669 trivial. 0 not checked. [2020-07-20 21:26:52,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:26:55,510 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:26:55,616 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:26:56,048 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:26:56,265 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:26:56,378 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:26:56,498 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:26:56,612 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:26:56,733 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 21:26:56,853 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 21:26:58,257 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:26:58,403 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:26:58,553 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 21:26:58,694 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 21:26:58,827 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:26:58,952 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 21:26:59,071 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:26:59,182 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-20 21:26:59,287 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:27:11,389 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 21:27:11,521 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 21:27:11,651 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 21:27:11,765 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 21:27:12,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:12,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:14,248 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:27:14,669 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:27:14,780 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:27:14,897 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:27:15,001 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:27:15,305 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-07-20 21:27:15,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:15,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:17,630 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 21:27:17,734 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 21:27:17,847 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:27:17,961 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:27:18,067 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:27:18,311 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-07-20 21:27:18,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:18,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:20,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:20,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:22,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:22,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:23,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:23,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:23,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:23,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:23,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:25,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:27:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 3925 proven. 5039 refuted. 0 times theorem prover too weak. 80577 trivial. 0 not checked. [2020-07-20 21:27:33,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536649961] [2020-07-20 21:27:33,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:27:33,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-20 21:27:33,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148147732] [2020-07-20 21:27:33,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:27:33,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:27:33,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:27:33,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:27:33,442 INFO L87 Difference]: Start difference. First operand 199 states and 299 transitions. Second operand 24 states. [2020-07-20 21:27:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:27:35,178 INFO L93 Difference]: Finished difference Result 341 states and 519 transitions. [2020-07-20 21:27:35,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:27:35,184 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1224 [2020-07-20 21:27:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:27:35,191 INFO L225 Difference]: With dead ends: 341 [2020-07-20 21:27:35,192 INFO L226 Difference]: Without dead ends: 285 [2020-07-20 21:27:35,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2456 GetRequests, 2406 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 21:27:35,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-20 21:27:35,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 111. [2020-07-20 21:27:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-20 21:27:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2020-07-20 21:27:35,220 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 161 transitions. Word has length 1224 [2020-07-20 21:27:35,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:27:35,221 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 161 transitions. [2020-07-20 21:27:35,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:27:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 161 transitions. [2020-07-20 21:27:35,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1214 [2020-07-20 21:27:35,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:27:35,237 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 144, 88, 88, 88, 88, 88, 88, 88, 56, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:27:35,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:35,452 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:27:35,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:27:35,453 INFO L82 PathProgramCache]: Analyzing trace with hash -666509037, now seen corresponding path program 35 times [2020-07-20 21:27:35,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:27:35,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586887363] [2020-07-20 21:27:35,455 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:27:36,905 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:27:36,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:27:36,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 2270 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 21:27:36,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:27:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 87912 backedges. 1350 proven. 8042 refuted. 0 times theorem prover too weak. 78520 trivial. 0 not checked. [2020-07-20 21:27:37,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:27:39,153 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:27:39,256 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:27:39,714 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:27:39,821 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:27:39,934 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:27:40,047 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:27:40,742 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 21:27:40,863 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 21:27:40,992 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:27:41,125 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:27:42,192 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:27:42,332 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:27:42,480 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:27:42,627 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:27:44,284 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 21:27:44,451 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 21:27:44,615 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:27:44,784 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:27:44,954 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:27:45,107 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:27:45,252 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:27:45,381 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 21:27:45,506 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 21:27:45,625 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:27:45,733 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:27:45,841 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:27:56,850 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:27:56,960 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:27:57,429 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:27:57,546 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:27:57,672 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:27:57,794 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:27:58,521 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 21:27:58,651 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 21:27:58,788 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:27:58,923 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:27:59,998 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:28:00,140 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:28:00,291 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:28:00,443 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:28:00,592 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 21:28:00,728 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 21:28:00,855 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 21:28:00,974 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:28:01,088 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:28:01,191 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:28:01,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:07,309 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 21:28:07,435 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 21:28:07,573 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:28:07,707 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:28:08,230 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:28:08,344 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:28:08,469 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:28:08,579 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:28:09,133 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 21:28:09,242 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 21:28:09,359 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:28:09,485 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:28:09,619 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 21:28:09,740 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:28:09,855 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:28:09,970 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:28:10,272 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:28:10,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:13,641 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:28:13,756 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:28:14,268 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:28:14,390 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:28:14,519 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:28:14,643 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:28:14,765 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:28:14,879 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:28:14,988 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:28:15,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:18,426 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:28:18,535 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:28:18,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:18,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:21,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:21,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:22,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:22,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:23,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:23,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:23,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:23,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:23,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:23,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:24,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 87912 backedges. 1366 proven. 8152 refuted. 0 times theorem prover too weak. 78394 trivial. 0 not checked. [2020-07-20 21:28:24,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586887363] [2020-07-20 21:28:24,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:28:24,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-20 21:28:24,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272064799] [2020-07-20 21:28:24,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:28:24,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:28:24,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:28:24,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:28:24,763 INFO L87 Difference]: Start difference. First operand 111 states and 161 transitions. Second operand 24 states. [2020-07-20 21:28:27,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:28:27,030 INFO L93 Difference]: Finished difference Result 324 states and 482 transitions. [2020-07-20 21:28:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:28:27,039 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1213 [2020-07-20 21:28:27,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:28:27,044 INFO L225 Difference]: With dead ends: 324 [2020-07-20 21:28:27,045 INFO L226 Difference]: Without dead ends: 108 [2020-07-20 21:28:27,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2435 GetRequests, 2382 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 21:28:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-20 21:28:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-20 21:28:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-20 21:28:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 132 transitions. [2020-07-20 21:28:27,063 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 132 transitions. Word has length 1213 [2020-07-20 21:28:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:28:27,063 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 132 transitions. [2020-07-20 21:28:27,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:28:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 132 transitions. [2020-07-20 21:28:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-20 21:28:27,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:28:27,079 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:28:27,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:28:27,280 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:28:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:28:27,282 INFO L82 PathProgramCache]: Analyzing trace with hash 221687074, now seen corresponding path program 36 times [2020-07-20 21:28:27,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:28:27,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121277018] [2020-07-20 21:28:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:28:28,924 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:28:28,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:28:28,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 2287 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 21:28:28,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:28:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 1425 proven. 7447 refuted. 0 times theorem prover too weak. 80669 trivial. 0 not checked. [2020-07-20 21:28:30,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:28:32,457 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:28:32,570 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:28:32,690 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-20 21:28:32,812 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-20 21:28:33,763 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:28:34,617 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:28:34,732 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:28:34,890 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 21:28:35,048 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 21:28:36,939 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:28:37,106 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:28:37,284 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 21:28:37,446 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 21:28:37,610 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:28:37,762 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:28:37,901 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 21:28:38,160 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:28:38,284 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:28:38,401 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:28:38,587 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-07-20 21:28:49,652 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 21:28:52,116 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:28:52,248 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 21:28:52,398 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 21:28:52,571 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 21:28:52,721 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 21:28:52,857 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 21:28:52,985 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:28:53,102 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 21:28:53,211 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:28:53,315 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:28:53,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:28:53,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:01,414 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:29:01,539 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:29:01,674 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-20 21:29:01,808 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-20 21:29:02,627 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:29:02,759 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:29:02,904 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:29:03,048 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 21:29:03,190 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:29:03,317 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 21:29:03,439 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:29:03,548 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:29:03,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:08,295 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 21:29:08,400 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 21:29:08,949 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:29:09,078 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:29:09,217 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-20 21:29:09,348 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-20 21:29:09,479 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:29:09,603 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:29:09,713 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 21:29:09,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:13,357 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 21:29:13,474 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 21:29:13,581 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:29:13,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:16,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:16,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:17,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:17,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:18,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:18,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:18,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:18,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:18,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 1431 proven. 7533 refuted. 0 times theorem prover too weak. 80577 trivial. 0 not checked. [2020-07-20 21:29:19,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121277018] [2020-07-20 21:29:19,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:29:19,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-20 21:29:19,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815892881] [2020-07-20 21:29:19,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:29:19,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:29:19,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:29:19,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:29:19,794 INFO L87 Difference]: Start difference. First operand 108 states and 132 transitions. Second operand 24 states. [2020-07-20 21:29:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:29:21,436 INFO L93 Difference]: Finished difference Result 150 states and 180 transitions. [2020-07-20 21:29:21,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:29:21,444 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1224 [2020-07-20 21:29:21,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:29:21,448 INFO L225 Difference]: With dead ends: 150 [2020-07-20 21:29:21,448 INFO L226 Difference]: Without dead ends: 103 [2020-07-20 21:29:21,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2456 GetRequests, 2406 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 21:29:21,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-20 21:29:21,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-07-20 21:29:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-20 21:29:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2020-07-20 21:29:21,467 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 1224 [2020-07-20 21:29:21,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:29:21,467 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2020-07-20 21:29:21,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:29:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2020-07-20 21:29:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-20 21:29:21,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:29:21,480 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:29:21,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:29:21,681 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:29:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:29:21,682 INFO L82 PathProgramCache]: Analyzing trace with hash -69238494, now seen corresponding path program 37 times [2020-07-20 21:29:21,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:29:21,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55150638] [2020-07-20 21:29:21,683 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:29:23,293 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:29:23,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:29:23,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 2287 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 21:29:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:29:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 1438 proven. 8365 refuted. 0 times theorem prover too weak. 79738 trivial. 0 not checked. [2020-07-20 21:29:24,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:29:26,271 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:29:26,412 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:29:26,551 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 21:29:26,697 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 21:29:27,512 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:29:27,678 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:29:27,850 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:29:28,013 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:29:29,341 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:29:29,518 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:29:29,715 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 21:29:29,916 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 21:29:32,011 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:29:32,181 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:29:32,391 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:29:32,595 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:29:32,807 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 21:29:33,007 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 21:29:33,192 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 21:29:33,369 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 21:29:33,538 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:29:33,684 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 21:29:33,828 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-20 21:29:33,973 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:29:34,110 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 21:29:34,228 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-20 21:29:34,338 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-20 21:29:46,428 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 21:29:46,692 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 21:29:46,901 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 21:29:47,010 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 21:29:47,383 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 21:29:47,512 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 21:29:47,653 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:29:47,796 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-20 21:29:48,419 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:29:48,576 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:29:48,745 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 21:29:48,915 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 21:29:49,854 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:29:50,018 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:29:50,194 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:29:50,367 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:29:51,728 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:29:51,906 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:29:52,096 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 21:29:52,300 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 21:29:52,494 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:29:52,677 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:29:52,847 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 21:29:53,003 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:29:53,151 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:29:53,282 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:29:53,408 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:29:53,537 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 21:29:53,652 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 21:29:53,755 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 21:29:53,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:29:53,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts