/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/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:41:40,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:41:40,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:41:40,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:41:40,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:41:40,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:41:40,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:41:40,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:41:40,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:41:40,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:41:40,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:41:40,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:41:40,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:41:40,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:41:40,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:41:40,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:41:40,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:41:40,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:41:40,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:41:40,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:41:40,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:41:40,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:41:40,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:41:40,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:41:40,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:41:40,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:41:40,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:41:40,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:41:40,529 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 22:41:40,550 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:41:40,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:41:40,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:41:40,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:41:40,552 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:41:40,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:41:40,553 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:41:40,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:41:40,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:41:40,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:41:40,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:41:40,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:41:40,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:41:40,554 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:41:40,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:41:40,554 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:41:40,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:41:40,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:41:40,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:41:40,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:41:40,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:41:40,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:41:40,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:41:40,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:41:40,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:41:40,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:41:40,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:41:40,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:41:40,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:41:40,557 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 22:41:40,878 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:41:40,900 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:41:40,904 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:41:40,906 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:41:40,907 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:41:40,909 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-07-20 22:41:41,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76da47267/d78c2515e57b42619c69e2af94a0f12f/FLAG7283f5d35 [2020-07-20 22:41:41,565 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:41:41,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2020-07-20 22:41:41,574 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76da47267/d78c2515e57b42619c69e2af94a0f12f/FLAG7283f5d35 [2020-07-20 22:41:41,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76da47267/d78c2515e57b42619c69e2af94a0f12f [2020-07-20 22:41:41,913 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:41:41,916 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:41:41,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:41:41,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:41:41,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:41:41,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:41:41" (1/1) ... [2020-07-20 22:41:41,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c54790d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:41, skipping insertion in model container [2020-07-20 22:41:41,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:41:41" (1/1) ... [2020-07-20 22:41:41,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:41:41,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:41:42,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:41:42,176 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:41:42,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:41:42,210 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:41:42,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:42 WrapperNode [2020-07-20 22:41:42,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:41:42,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:41:42,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:41:42,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:41:42,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:42" (1/1) ... [2020-07-20 22:41:42,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:42" (1/1) ... [2020-07-20 22:41:42,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:42" (1/1) ... [2020-07-20 22:41:42,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:42" (1/1) ... [2020-07-20 22:41:42,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:42" (1/1) ... [2020-07-20 22:41:42,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:42" (1/1) ... [2020-07-20 22:41:42,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:42" (1/1) ... [2020-07-20 22:41:42,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:41:42,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:41:42,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:41:42,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:41:42,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:42" (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 22:41:42,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:41:42,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:41:42,421 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:41:42,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:41:42,421 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:41:42,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:41:42,421 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:41:42,422 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:41:42,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:41:42,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:41:42,422 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:41:42,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:41:42,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:41:42,678 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:41:42,679 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:41:42,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:41:42 BoogieIcfgContainer [2020-07-20 22:41:42,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:41:42,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:41:42,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:41:42,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:41:42,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:41:41" (1/3) ... [2020-07-20 22:41:42,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c83c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:41:42, skipping insertion in model container [2020-07-20 22:41:42,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:42" (2/3) ... [2020-07-20 22:41:42,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c83c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:41:42, skipping insertion in model container [2020-07-20 22:41:42,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:41:42" (3/3) ... [2020-07-20 22:41:42,693 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-07-20 22:41:42,706 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:41:42,714 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:41:42,731 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:41:42,757 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:41:42,757 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:41:42,757 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:41:42,757 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:41:42,758 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:41:42,758 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:41:42,758 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:41:42,758 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:41:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-20 22:41:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 22:41:42,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:41:42,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:41:42,787 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:41:42,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:41:42,793 INFO L82 PathProgramCache]: Analyzing trace with hash -961315073, now seen corresponding path program 1 times [2020-07-20 22:41:42,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:41:42,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678913128] [2020-07-20 22:41:42,802 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 22:41:42,888 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:41:42,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:41:42,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 22:41:42,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:41:42,935 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 22:41:42,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:41:42,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678913128] [2020-07-20 22:41:42,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:41:42,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 22:41:42,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170600405] [2020-07-20 22:41:42,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 22:41:42,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:41:42,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 22:41:42,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 22:41:42,978 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-20 22:41:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:41:43,011 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-07-20 22:41:43,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 22:41:43,013 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-20 22:41:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:41:43,022 INFO L225 Difference]: With dead ends: 33 [2020-07-20 22:41:43,022 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 22:41:43,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 22:41:43,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 22:41:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 22:41:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 22:41:43,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-20 22:41:43,085 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-07-20 22:41:43,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:41:43,085 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-20 22:41:43,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 22:41:43,086 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-20 22:41:43,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 22:41:43,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:41:43,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:41:43,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:41:43,289 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:41:43,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:41:43,290 INFO L82 PathProgramCache]: Analyzing trace with hash -971473804, now seen corresponding path program 1 times [2020-07-20 22:41:43,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:41:43,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836415256] [2020-07-20 22:41:43,291 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 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 22:41:43,328 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:41:43,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:41:43,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:41:43,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:41:43,424 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:41:43,477 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 22:41:43,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:41:43,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836415256] [2020-07-20 22:41:43,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:41:43,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 22:41:43,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266010003] [2020-07-20 22:41:43,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 22:41:43,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:41:43,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 22:41:43,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:41:43,483 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-07-20 22:41:43,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:41:43,597 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-07-20 22:41:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:41:43,598 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-07-20 22:41:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:41:43,602 INFO L225 Difference]: With dead ends: 26 [2020-07-20 22:41:43,602 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 22:41:43,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:41:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 22:41:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-07-20 22:41:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 22:41:43,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 22:41:43,617 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-07-20 22:41:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:41:43,619 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 22:41:43,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 22:41:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 22:41:43,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 22:41:43,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:41:43,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:41:43,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:41:43,840 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:41:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:41:43,843 INFO L82 PathProgramCache]: Analyzing trace with hash -18708286, now seen corresponding path program 1 times [2020-07-20 22:41:43,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:41:43,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856801789] [2020-07-20 22:41:43,844 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 22:41:43,884 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:41:43,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:41:43,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 22:41:43,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:41:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:41:43,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:41:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:41:44,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856801789] [2020-07-20 22:41:44,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:41:44,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-07-20 22:41:44,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626984545] [2020-07-20 22:41:44,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 22:41:44,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:41:44,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 22:41:44,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-20 22:41:44,053 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 10 states. [2020-07-20 22:41:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:41:44,209 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-07-20 22:41:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 22:41:44,210 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-07-20 22:41:44,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:41:44,211 INFO L225 Difference]: With dead ends: 31 [2020-07-20 22:41:44,211 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 22:41:44,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:41:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 22:41:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-07-20 22:41:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 22:41:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 22:41:44,219 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-07-20 22:41:44,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:41:44,220 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 22:41:44,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 22:41:44,220 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 22:41:44,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 22:41:44,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:41:44,221 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:41:44,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:41:44,436 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:41:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:41:44,438 INFO L82 PathProgramCache]: Analyzing trace with hash 154986550, now seen corresponding path program 1 times [2020-07-20 22:41:44,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:41:44,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279134159] [2020-07-20 22:41:44,440 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 22:41:44,477 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:41:44,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:41:44,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 22:41:44,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:41:44,600 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:41:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:41:44,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:41:44,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:41:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:41:44,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279134159] [2020-07-20 22:41:44,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:41:44,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-20 22:41:44,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275674971] [2020-07-20 22:41:44,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 22:41:44,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:41:44,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 22:41:44,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-07-20 22:41:44,970 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 17 states. [2020-07-20 22:41:45,379 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-07-20 22:41:45,525 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2020-07-20 22:41:45,911 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2020-07-20 22:41:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:41:46,139 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-07-20 22:41:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 22:41:46,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2020-07-20 22:41:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:41:46,141 INFO L225 Difference]: With dead ends: 46 [2020-07-20 22:41:46,141 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 22:41:46,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-07-20 22:41:46,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 22:41:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-07-20 22:41:46,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 22:41:46,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-20 22:41:46,151 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-07-20 22:41:46,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:41:46,151 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-20 22:41:46,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 22:41:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-20 22:41:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 22:41:46,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:41:46,153 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:41:46,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:41:46,367 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:41:46,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:41:46,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1027624830, now seen corresponding path program 2 times [2020-07-20 22:41:46,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:41:46,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215849853] [2020-07-20 22:41:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:41:46,406 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:41:46,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:41:46,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 22:41:46,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:41:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:41:46,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:41:46,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:41:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:41:47,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215849853] [2020-07-20 22:41:47,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:41:47,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-07-20 22:41:47,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547017548] [2020-07-20 22:41:47,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 22:41:47,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:41:47,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 22:41:47,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2020-07-20 22:41:47,309 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 26 states. [2020-07-20 22:41:48,015 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2020-07-20 22:41:48,288 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-07-20 22:41:48,511 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 28 [2020-07-20 22:41:48,800 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-07-20 22:41:49,213 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-07-20 22:41:49,436 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-07-20 22:41:49,899 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-07-20 22:41:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:41:50,119 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-07-20 22:41:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 22:41:50,120 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2020-07-20 22:41:50,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:41:50,121 INFO L225 Difference]: With dead ends: 59 [2020-07-20 22:41:50,122 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 22:41:50,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=328, Invalid=1478, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 22:41:50,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 22:41:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-07-20 22:41:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 22:41:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-07-20 22:41:50,144 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 26 [2020-07-20 22:41:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:41:50,145 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-07-20 22:41:50,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 22:41:50,145 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-07-20 22:41:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 22:41:50,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:41:50,148 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:41:50,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:41:50,356 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:41:50,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:41:50,356 INFO L82 PathProgramCache]: Analyzing trace with hash 920818300, now seen corresponding path program 3 times [2020-07-20 22:41:50,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:41:50,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596254277] [2020-07-20 22:41:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:41:50,412 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:41:50,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:41:50,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 22:41:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:41:50,675 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:41:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:41:50,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:41:50,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:41:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:41:51,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596254277] [2020-07-20 22:41:51,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:41:51,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2020-07-20 22:41:51,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619913813] [2020-07-20 22:41:51,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 22:41:51,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:41:51,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 22:41:51,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=966, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 22:41:51,906 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 35 states. [2020-07-20 22:41:53,441 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-07-20 22:41:53,745 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-07-20 22:41:54,255 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-20 22:41:54,435 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-07-20 22:41:54,642 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 22:41:54,832 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-20 22:41:55,002 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 22:41:55,382 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-20 22:41:55,574 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-07-20 22:41:55,773 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:41:55,954 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-20 22:41:56,134 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-07-20 22:41:56,338 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-07-20 22:41:56,540 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-07-20 22:41:56,752 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-07-20 22:41:57,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:41:57,146 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2020-07-20 22:41:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-20 22:41:57,154 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2020-07-20 22:41:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:41:57,156 INFO L225 Difference]: With dead ends: 99 [2020-07-20 22:41:57,156 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 22:41:57,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=986, Invalid=3984, Unknown=0, NotChecked=0, Total=4970 [2020-07-20 22:41:57,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 22:41:57,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2020-07-20 22:41:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 22:41:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-07-20 22:41:57,177 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 35 [2020-07-20 22:41:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:41:57,178 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-07-20 22:41:57,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 22:41:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-07-20 22:41:57,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 22:41:57,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:41:57,181 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:41:57,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:41:57,395 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:41:57,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:41:57,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1709147710, now seen corresponding path program 4 times [2020-07-20 22:41:57,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:41:57,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594732357] [2020-07-20 22:41:57,397 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 22:41:57,461 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:41:57,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:41:57,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 22:41:57,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:41:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 213 proven. 155 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 22:41:57,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:41:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 213 proven. 85 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2020-07-20 22:41:57,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594732357] [2020-07-20 22:41:57,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:41:57,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 15 [2020-07-20 22:41:57,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063911554] [2020-07-20 22:41:57,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 22:41:57,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:41:57,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 22:41:57,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-07-20 22:41:57,666 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 15 states. [2020-07-20 22:41:57,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:41:57,951 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2020-07-20 22:41:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 22:41:57,952 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-07-20 22:41:57,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:41:57,953 INFO L225 Difference]: With dead ends: 97 [2020-07-20 22:41:57,953 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 22:41:57,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-07-20 22:41:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 22:41:57,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-20 22:41:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 22:41:57,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-07-20 22:41:57,981 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 62 [2020-07-20 22:41:57,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:41:57,981 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-07-20 22:41:57,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 22:41:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-07-20 22:41:57,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 22:41:57,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:41:57,991 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:41:58,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:41:58,208 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:41:58,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:41:58,209 INFO L82 PathProgramCache]: Analyzing trace with hash -963235770, now seen corresponding path program 5 times [2020-07-20 22:41:58,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:41:58,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200776231] [2020-07-20 22:41:58,210 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 22:41:58,271 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:41:58,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:41:58,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 62 conjunts are in the unsatisfiable core [2020-07-20 22:41:58,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:41:59,152 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:41:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:41:59,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:41:59,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:42:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:42:03,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200776231] [2020-07-20 22:42:03,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:42:03,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 65 [2020-07-20 22:42:03,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022874080] [2020-07-20 22:42:03,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-20 22:42:03,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:42:03,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-20 22:42:03,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=3316, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 22:42:03,227 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2020-07-20 22:42:05,842 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-20 22:42:06,478 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2020-07-20 22:42:06,674 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-20 22:42:06,893 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-20 22:42:07,514 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:42:07,786 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:42:08,011 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:42:08,257 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:42:08,495 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:42:08,773 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:42:09,041 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-20 22:42:09,297 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:42:09,532 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:42:09,797 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 22:42:10,037 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 22:42:10,319 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 22:42:10,588 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-20 22:42:10,994 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 22:42:11,288 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-20 22:42:11,568 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:42:11,835 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:42:12,177 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:42:12,487 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:42:12,797 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:42:13,067 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:42:13,375 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:42:13,624 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:42:13,955 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 22:42:14,253 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-20 22:42:14,549 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 22:42:14,806 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:42:15,109 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-20 22:42:15,501 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-20 22:42:15,948 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 22:42:16,260 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-20 22:42:16,595 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 22:42:16,893 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-20 22:42:17,254 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 22:42:17,531 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 22:42:17,830 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 22:42:18,147 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-20 22:42:18,479 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-20 22:42:18,790 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-20 22:42:19,106 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-20 22:42:19,393 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-20 22:42:19,745 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-20 22:42:20,078 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-20 22:42:20,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:42:20,739 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2020-07-20 22:42:20,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-07-20 22:42:20,740 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2020-07-20 22:42:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:42:20,742 INFO L225 Difference]: With dead ends: 140 [2020-07-20 22:42:20,743 INFO L226 Difference]: Without dead ends: 126 [2020-07-20 22:42:20,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4543 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=3833, Invalid=15349, Unknown=0, NotChecked=0, Total=19182 [2020-07-20 22:42:20,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-07-20 22:42:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-07-20 22:42:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-20 22:42:20,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2020-07-20 22:42:20,780 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 65 [2020-07-20 22:42:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:42:20,781 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2020-07-20 22:42:20,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-20 22:42:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2020-07-20 22:42:20,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-07-20 22:42:20,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:42:20,783 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:42:20,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:42:20,996 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:42:20,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:42:20,996 INFO L82 PathProgramCache]: Analyzing trace with hash -352726182, now seen corresponding path program 6 times [2020-07-20 22:42:20,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:42:20,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758366779] [2020-07-20 22:42:20,998 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 22:42:21,114 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:42:21,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:42:21,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 121 conjunts are in the unsatisfiable core [2020-07-20 22:42:21,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:42:24,775 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:42:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:42:25,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:42:25,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:42:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:42:39,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758366779] [2020-07-20 22:42:39,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:42:39,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 125 [2020-07-20 22:42:39,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648880369] [2020-07-20 22:42:39,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2020-07-20 22:42:39,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:42:39,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2020-07-20 22:42:39,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2482, Invalid=13018, Unknown=0, NotChecked=0, Total=15500 [2020-07-20 22:42:39,577 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2020-07-20 22:42:55,735 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-07-20 22:42:56,326 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-07-20 22:42:56,727 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2020-07-20 22:42:57,237 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-07-20 22:42:58,568 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:42:59,101 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:42:59,552 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:00,112 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-07-20 22:43:01,282 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:01,814 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:02,270 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:02,804 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-07-20 22:43:03,954 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:04,438 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:04,871 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:05,382 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-07-20 22:43:06,702 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:07,354 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:07,848 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:08,478 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-07-20 22:43:09,841 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:10,361 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:10,816 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:11,377 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-07-20 22:43:12,792 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:13,379 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:13,895 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:14,514 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-07-20 22:43:16,023 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:16,652 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:17,311 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:17,982 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-07-20 22:43:19,504 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:20,171 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:20,792 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:21,496 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-07-20 22:43:23,047 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:23,675 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:24,236 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:24,929 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-07-20 22:43:26,477 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:27,078 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:27,620 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:28,268 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-07-20 22:43:29,797 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:30,468 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:31,069 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:31,796 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-07-20 22:43:33,374 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:34,068 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:34,712 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:35,531 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-07-20 22:43:37,150 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:37,855 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:38,534 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:39,341 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-07-20 22:43:41,163 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:41,983 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 22:43:42,705 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:43,534 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-07-20 22:43:45,249 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:43:46,099 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:43:46,851 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:47,735 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-07-20 22:43:49,535 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:43:50,333 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:43:51,165 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-07-20 22:43:52,265 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-07-20 22:43:52,875 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 22:43:54,459 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 22:43:55,376 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-07-20 22:43:56,216 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-07-20 22:43:57,266 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-20 22:43:57,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:43:57,402 INFO L93 Difference]: Finished difference Result 264 states and 282 transitions. [2020-07-20 22:43:57,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2020-07-20 22:43:57,406 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2020-07-20 22:43:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:43:57,410 INFO L225 Difference]: With dead ends: 264 [2020-07-20 22:43:57,410 INFO L226 Difference]: Without dead ends: 241 [2020-07-20 22:43:57,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25673 ImplicationChecksByTransitivity, 87.5s TimeCoverageRelationStatistics Valid=12349, Invalid=79763, Unknown=0, NotChecked=0, Total=92112 [2020-07-20 22:43:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-07-20 22:43:57,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2020-07-20 22:43:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-07-20 22:43:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 240 transitions. [2020-07-20 22:43:57,465 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 240 transitions. Word has length 125 [2020-07-20 22:43:57,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:43:57,466 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 240 transitions. [2020-07-20 22:43:57,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 125 states. [2020-07-20 22:43:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 240 transitions. [2020-07-20 22:43:57,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-07-20 22:43:57,471 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:43:57,472 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:43:57,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:43:57,686 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:43:57,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:43:57,687 INFO L82 PathProgramCache]: Analyzing trace with hash 769144000, now seen corresponding path program 7 times [2020-07-20 22:43:57,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:43:57,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845780316] [2020-07-20 22:43:57,688 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 22:43:58,049 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:43:58,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:43:58,060 WARN L261 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 236 conjunts are in the unsatisfiable core [2020-07-20 22:43:58,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:44:26,143 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:44:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 0 proven. 8626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:44:27,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:44:28,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:44:31,480 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-20 22:44:36,780 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 22:44:38,576 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:44:39,545 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:44:40,467 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:44:42,423 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:44:43,404 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:44:55,188 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:44:56,341 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:44:59,179 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:00,272 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:01,397 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:02,663 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:03,796 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:04,910 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:06,220 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:07,405 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:08,569 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:09,956 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:11,126 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:12,291 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:13,693 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:14,895 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:16,128 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:17,597 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:18,825 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:20,061 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:21,550 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:22,829 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:24,124 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:25,682 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:26,994 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:28,311 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:29,938 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:31,299 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:32,644 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:34,325 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:35,758 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:37,169 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:38,961 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:40,422 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:41,880 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:43,689 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:45,148 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:46,629 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:48,481 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:50,030 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:51,599 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:53,559 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:55,043 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:56,490 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:58,270 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:45:59,730 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:01,175 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:02,977 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:04,420 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:05,858 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:07,511 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:08,969 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:10,675 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:12,831 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:14,603 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:16,344 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:18,547 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:20,327 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:22,112 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:24,412 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:26,264 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:28,074 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:30,477 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:32,379 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:34,285 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:36,740 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:38,662 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:40,613 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:43,137 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:45,150 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:47,198 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:49,737 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:51,777 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:53,865 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:56,510 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:46:58,597 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:47:00,698 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:47:03,461 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:47:05,607 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:47:07,781 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:47:10,415 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:47:12,348 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:47:14,316 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:47:16,792 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:47:18,767 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:47:20,687 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:47:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 0 proven. 8626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:47:21,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845780316] [2020-07-20 22:47:21,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:47:21,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 239 [2020-07-20 22:47:21,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586355506] [2020-07-20 22:47:21,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 239 states [2020-07-20 22:47:21,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:47:21,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 239 interpolants. [2020-07-20 22:47:21,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12821, Invalid=44061, Unknown=0, NotChecked=0, Total=56882 [2020-07-20 22:47:21,124 INFO L87 Difference]: Start difference. First operand 240 states and 240 transitions. Second operand 239 states. [2020-07-20 22:48:45,586 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-07-20 22:48:46,553 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-07-20 22:48:48,078 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-20 22:48:49,736 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-20 22:48:51,105 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-20 22:48:52,119 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-07-20 22:48:53,353 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-20 22:48:54,596 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-20 22:48:55,938 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-20 22:48:57,425 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-20 22:48:58,800 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:49:00,304 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:49:01,571 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:49:03,199 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:49:04,616 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:49:06,389 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:49:07,928 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-20 22:49:09,217 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:49:10,354 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:49:11,842 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 22:49:13,269 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 22:49:15,096 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 22:49:16,757 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-20 22:49:18,278 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 22:49:19,578 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-20 22:49:21,835 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:49:23,303 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:49:25,245 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:49:26,930 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:49:28,556 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:49:29,836 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:49:31,607 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:49:33,302 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:49:35,230 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:49:37,605 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:49:39,039 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:49:40,261 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:49:42,157 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:49:43,712 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:49:45,387 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:49:46,909 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:49:49,090 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:49:51,043 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:49:52,975 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:49:54,552 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:49:56,349 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:49:57,896 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:49:59,327 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:50:00,533 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:50:02,498 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:50:04,280 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:50:06,344 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:50:08,913 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:50:10,610 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:50:12,057 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:50:13,854 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:50:15,496 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:50:17,481 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:50:19,307 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:50:21,033 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:50:22,547 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:50:24,382 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:50:26,081 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:50:28,077 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:50:29,917 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:50:31,631 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:50:33,125 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:50:35,025 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:50:36,706 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:50:38,770 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:50:40,744 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:50:42,565 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:50:44,174 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:50:46,412 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:50:48,358 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:50:50,516 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:50:53,252 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:50:55,146 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:50:56,725 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:50:59,414 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:51:01,400 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:51:03,579 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:51:06,438 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:51:08,186 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:51:09,693 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:51:11,980 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:51:13,769 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:51:15,959 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:51:18,154 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:51:20,175 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:51:21,938 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:51:24,225 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:51:26,376 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:51:28,702 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:51:31,573 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:51:33,401 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:51:34,965 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:51:37,325 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:51:39,464 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:51:41,805 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:51:44,778 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:51:46,831 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:51:48,668 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:51:50,751 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:51:52,885 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:51:55,340 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:51:57,656 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:51:59,841 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:52:01,761 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:52:04,161 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:52:06,342 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:52:08,707 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:52:11,906 WARN L193 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:52:13,950 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:52:15,774 WARN L193 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:52:18,002 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:52:19,975 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:52:22,162 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:52:24,273 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:52:26,273 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:52:28,029 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:52:30,356 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:52:32,059 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:52:34,478 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:52:36,673 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:52:38,707 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:52:40,436 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:52:42,837 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:52:44,639 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:52:47,082 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:52:49,638 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:52:51,747 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:52:53,576 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:52:56,282 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:52:58,390 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:53:00,978 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:53:03,384 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:53:05,538 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:53:07,418 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:53:09,778 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:53:12,144 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:53:14,760 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:53:17,288 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:53:19,500 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:53:21,381 WARN L193 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:53:24,139 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:53:26,312 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:53:28,727 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:53:31,016 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:53:33,309 WARN L193 SmtUtils]: Spent 925.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:53:35,282 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:53:37,816 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:53:40,016 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:53:42,697 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:53:45,208 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:53:47,777 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:53:50,045 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:53:52,985 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:53:55,210 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:53:57,997 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:54:00,791 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:54:03,136 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:54:05,223 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:54:08,170 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:54:10,503 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:54:13,308 WARN L193 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:54:15,937 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:54:18,372 WARN L193 SmtUtils]: Spent 960.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:54:20,465 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:54:23,471 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:54:25,761 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:54:28,339 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:54:30,948 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:54:33,470 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:54:35,682 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:54:38,497 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:54:41,205 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:54:44,137 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:54:48,134 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:54:50,677 WARN L193 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:54:52,886 WARN L193 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:54:55,613 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:54:58,387 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:55:01,345 WARN L193 SmtUtils]: Spent 995.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:55:04,256 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:55:06,964 WARN L193 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:55:09,282 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:55:12,149 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:55:14,981 WARN L193 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:55:18,144 WARN L193 SmtUtils]: Spent 960.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:55:22,394 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:55:24,995 WARN L193 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:55:27,296 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:55:30,399 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:55:32,919 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:55:35,709 WARN L193 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:55:38,543 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 22:55:40,992 WARN L193 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:55:43,066 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 22:55:46,267 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:55:49,149 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 22:55:52,383 WARN L193 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 22:55:56,665 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41