/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:03:23,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:03:23,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:03:23,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:03:23,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:03:23,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:03:23,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:03:23,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:03:23,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:03:23,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:03:23,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:03:23,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:03:23,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:03:23,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:03:23,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:03:23,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:03:23,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:03:23,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:03:23,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:03:23,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:03:23,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:03:23,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:03:23,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:03:23,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:03:23,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:03:23,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:03:23,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:03:23,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:03:23,245 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:03:23,259 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:03:23,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:03:23,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:03:23,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:03:23,264 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:03:23,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:03:23,265 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:03:23,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:03:23,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:03:23,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:03:23,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:03:23,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:03:23,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:03:23,266 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:03:23,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:03:23,267 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:03:23,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:03:23,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:03:23,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:03:23,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:03:23,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:03:23,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:03:23,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:03:23,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:03:23,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:03:23,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:03:23,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:23,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:03:23,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:03:23,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:03:23,572 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:03:23,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:03:23,588 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:03:23,590 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:03:23,590 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:03:23,591 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi01.c [2020-07-21 22:03:23,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50586b8b/8956052af1f04f15b8a11edd06d0d2e4/FLAG6e359f6b3 [2020-07-21 22:03:24,069 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:03:24,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi01.c [2020-07-21 22:03:24,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50586b8b/8956052af1f04f15b8a11edd06d0d2e4/FLAG6e359f6b3 [2020-07-21 22:03:24,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50586b8b/8956052af1f04f15b8a11edd06d0d2e4 [2020-07-21 22:03:24,451 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:03:24,455 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:03:24,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:03:24,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:03:24,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:03:24,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:03:24" (1/1) ... [2020-07-21 22:03:24,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d82745c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:24, skipping insertion in model container [2020-07-21 22:03:24,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:03:24" (1/1) ... [2020-07-21 22:03:24,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:03:24,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:03:24,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:03:24,651 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:03:24,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:03:24,680 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:03:24,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:24 WrapperNode [2020-07-21 22:03:24,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:03:24,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:03:24,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:03:24,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:03:24,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:24" (1/1) ... [2020-07-21 22:03:24,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:24" (1/1) ... [2020-07-21 22:03:24,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:24" (1/1) ... [2020-07-21 22:03:24,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:24" (1/1) ... [2020-07-21 22:03:24,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:24" (1/1) ... [2020-07-21 22:03:24,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:24" (1/1) ... [2020-07-21 22:03:24,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:24" (1/1) ... [2020-07-21 22:03:24,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:03:24,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:03:24,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:03:24,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:03:24,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:03:24,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:03:24,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:03:24,867 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-21 22:03:24,867 INFO L138 BoogieDeclarations]: Found implementation of procedure applyHanoi [2020-07-21 22:03:24,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:03:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:03:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:03:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-21 22:03:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure applyHanoi [2020-07-21 22:03:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:03:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:03:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:03:25,067 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:03:25,068 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:03:25,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:03:25 BoogieIcfgContainer [2020-07-21 22:03:25,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:03:25,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:03:25,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:03:25,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:03:25,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:03:24" (1/3) ... [2020-07-21 22:03:25,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edadbf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:03:25, skipping insertion in model container [2020-07-21 22:03:25,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:03:24" (2/3) ... [2020-07-21 22:03:25,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edadbf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:03:25, skipping insertion in model container [2020-07-21 22:03:25,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:03:25" (3/3) ... [2020-07-21 22:03:25,082 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi01.c [2020-07-21 22:03:25,093 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:03:25,100 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:03:25,114 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:03:25,139 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:03:25,139 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:03:25,139 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:03:25,139 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:03:25,140 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:03:25,140 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:03:25,140 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:03:25,140 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:03:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 22:03:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 22:03:25,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:25,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:25,168 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:25,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:25,175 INFO L82 PathProgramCache]: Analyzing trace with hash -629617454, now seen corresponding path program 1 times [2020-07-21 22:03:25,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:25,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443156532] [2020-07-21 22:03:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:25,270 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:03:25,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:25,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:03:25,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:03:25,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:03:25,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443156532] [2020-07-21 22:03:25,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:03:25,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:03:25,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559881979] [2020-07-21 22:03:25,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:03:25,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:25,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:03:25,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:03:25,395 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-07-21 22:03:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:25,494 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-07-21 22:03:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:03:25,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 22:03:25,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:25,508 INFO L225 Difference]: With dead ends: 48 [2020-07-21 22:03:25,508 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 22:03:25,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:03:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 22:03:25,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 22:03:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 22:03:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-07-21 22:03:25,562 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 20 [2020-07-21 22:03:25,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:25,563 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-07-21 22:03:25,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:03:25,563 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-07-21 22:03:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 22:03:25,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:25,567 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:25,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:25,782 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:25,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:25,783 INFO L82 PathProgramCache]: Analyzing trace with hash 223523063, now seen corresponding path program 1 times [2020-07-21 22:03:25,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:25,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207722809] [2020-07-21 22:03:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:25,845 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:25,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:25,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 22:03:25,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-21 22:03:25,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:03:26,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207722809] [2020-07-21 22:03:26,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:26,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2020-07-21 22:03:26,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366764851] [2020-07-21 22:03:26,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:03:26,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:26,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:03:26,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:03:26,232 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 15 states. [2020-07-21 22:03:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:26,841 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2020-07-21 22:03:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 22:03:26,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-07-21 22:03:26,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:26,846 INFO L225 Difference]: With dead ends: 78 [2020-07-21 22:03:26,847 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 22:03:26,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:03:26,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 22:03:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2020-07-21 22:03:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 22:03:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2020-07-21 22:03:26,876 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 30 [2020-07-21 22:03:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:26,876 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2020-07-21 22:03:26,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:03:26,877 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2020-07-21 22:03:26,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 22:03:26,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:26,880 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:27,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:27,095 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:27,096 INFO L82 PathProgramCache]: Analyzing trace with hash 640231516, now seen corresponding path program 2 times [2020-07-21 22:03:27,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:27,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987388181] [2020-07-21 22:03:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:27,146 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:03:27,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:27,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 22:03:27,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 22:03:27,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:27,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:27,462 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:03:27,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 22:03:27,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987388181] [2020-07-21 22:03:27,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:27,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-21 22:03:27,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313313599] [2020-07-21 22:03:27,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:03:27,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:27,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:03:27,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:03:27,491 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand 11 states. [2020-07-21 22:03:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:27,634 INFO L93 Difference]: Finished difference Result 110 states and 174 transitions. [2020-07-21 22:03:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:03:27,635 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-21 22:03:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:27,637 INFO L225 Difference]: With dead ends: 110 [2020-07-21 22:03:27,638 INFO L226 Difference]: Without dead ends: 71 [2020-07-21 22:03:27,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:03:27,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-21 22:03:27,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-07-21 22:03:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 22:03:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-07-21 22:03:27,654 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 40 [2020-07-21 22:03:27,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:27,655 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-07-21 22:03:27,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:03:27,655 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-07-21 22:03:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 22:03:27,657 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:27,657 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:27,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:27,873 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:27,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:27,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1772916587, now seen corresponding path program 1 times [2020-07-21 22:03:27,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:27,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130751277] [2020-07-21 22:03:27,876 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:27,917 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:03:27,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:27,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 22:03:27,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 22:03:27,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:28,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:03:28,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:03:28,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130751277] [2020-07-21 22:03:28,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:28,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2020-07-21 22:03:28,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602704017] [2020-07-21 22:03:28,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:03:28,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:28,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:03:28,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:03:28,207 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 12 states. [2020-07-21 22:03:28,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:28,349 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-07-21 22:03:28,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:03:28,350 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-07-21 22:03:28,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:28,351 INFO L225 Difference]: With dead ends: 80 [2020-07-21 22:03:28,352 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 22:03:28,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:03:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 22:03:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-21 22:03:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 22:03:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2020-07-21 22:03:28,365 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 36 [2020-07-21 22:03:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:28,365 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2020-07-21 22:03:28,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:03:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2020-07-21 22:03:28,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 22:03:28,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:28,367 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:28,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:28,581 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:28,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:28,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1240446734, now seen corresponding path program 3 times [2020-07-21 22:03:28,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:28,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220389526] [2020-07-21 22:03:28,583 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:28,635 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:03:28,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:28,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:03:28,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:03:28,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:28,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:28,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 22:03:28,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220389526] [2020-07-21 22:03:28,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:28,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 22:03:28,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528102271] [2020-07-21 22:03:28,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:03:28,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:28,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:03:28,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:03:28,975 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand 11 states. [2020-07-21 22:03:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:29,134 INFO L93 Difference]: Finished difference Result 91 states and 141 transitions. [2020-07-21 22:03:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:03:29,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-21 22:03:29,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:29,135 INFO L225 Difference]: With dead ends: 91 [2020-07-21 22:03:29,136 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 22:03:29,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:03:29,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 22:03:29,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-07-21 22:03:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:03:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-21 22:03:29,151 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 40 [2020-07-21 22:03:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:29,151 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-21 22:03:29,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:03:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-21 22:03:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 22:03:29,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:29,153 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:29,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:29,357 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:29,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:29,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1471069545, now seen corresponding path program 4 times [2020-07-21 22:03:29,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:29,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259088691] [2020-07-21 22:03:29,359 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:29,412 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:29,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:29,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:03:29,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-07-21 22:03:29,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:29,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:29,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:29,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:29,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-21 22:03:29,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259088691] [2020-07-21 22:03:29,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:29,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 22:03:29,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330882033] [2020-07-21 22:03:29,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:03:29,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:29,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:03:29,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:03:29,908 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 13 states. [2020-07-21 22:03:30,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:30,062 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-07-21 22:03:30,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:03:30,065 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-07-21 22:03:30,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:30,067 INFO L225 Difference]: With dead ends: 58 [2020-07-21 22:03:30,067 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 22:03:30,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:03:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 22:03:30,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-07-21 22:03:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 22:03:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-07-21 22:03:30,082 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 50 [2020-07-21 22:03:30,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:30,085 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-07-21 22:03:30,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:03:30,085 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-07-21 22:03:30,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 22:03:30,094 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:30,094 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:30,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:30,310 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:30,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:30,311 INFO L82 PathProgramCache]: Analyzing trace with hash -979408629, now seen corresponding path program 2 times [2020-07-21 22:03:30,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:30,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707150247] [2020-07-21 22:03:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:30,383 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:30,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:30,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 22:03:30,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-21 22:03:30,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-21 22:03:31,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707150247] [2020-07-21 22:03:31,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:31,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 27 [2020-07-21 22:03:31,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079403812] [2020-07-21 22:03:31,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 22:03:31,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:31,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 22:03:31,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:03:31,142 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 27 states. [2020-07-21 22:03:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:32,768 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2020-07-21 22:03:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 22:03:32,769 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-07-21 22:03:32,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:32,772 INFO L225 Difference]: With dead ends: 105 [2020-07-21 22:03:32,772 INFO L226 Difference]: Without dead ends: 101 [2020-07-21 22:03:32,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 22:03:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-21 22:03:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2020-07-21 22:03:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-21 22:03:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 115 transitions. [2020-07-21 22:03:32,790 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 115 transitions. Word has length 56 [2020-07-21 22:03:32,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:32,790 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 115 transitions. [2020-07-21 22:03:32,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 22:03:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 115 transitions. [2020-07-21 22:03:32,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-21 22:03:32,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:32,793 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:33,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:33,006 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:33,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:33,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1033208535, now seen corresponding path program 3 times [2020-07-21 22:03:33,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:33,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212496301] [2020-07-21 22:03:33,008 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:33,057 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:03:33,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:33,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 22:03:33,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-07-21 22:03:33,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:33,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:33,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-07-21 22:03:33,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212496301] [2020-07-21 22:03:33,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:33,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:03:33,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241644175] [2020-07-21 22:03:33,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:03:33,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:33,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:03:33,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:03:33,490 INFO L87 Difference]: Start difference. First operand 84 states and 115 transitions. Second operand 15 states. [2020-07-21 22:03:33,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:33,768 INFO L93 Difference]: Finished difference Result 151 states and 226 transitions. [2020-07-21 22:03:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:03:33,768 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-07-21 22:03:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:33,770 INFO L225 Difference]: With dead ends: 151 [2020-07-21 22:03:33,770 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 22:03:33,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:03:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 22:03:33,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2020-07-21 22:03:33,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 22:03:33,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2020-07-21 22:03:33,786 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 62 [2020-07-21 22:03:33,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:33,787 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2020-07-21 22:03:33,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:03:33,787 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2020-07-21 22:03:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-21 22:03:33,788 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:33,789 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:34,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:34,002 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:34,003 INFO L82 PathProgramCache]: Analyzing trace with hash 622260971, now seen corresponding path program 4 times [2020-07-21 22:03:34,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:34,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740053419] [2020-07-21 22:03:34,005 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:34,074 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:03:34,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:34,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:03:34,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 74 proven. 70 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-21 22:03:34,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:34,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:34,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:34,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 74 proven. 75 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-07-21 22:03:34,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740053419] [2020-07-21 22:03:34,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:34,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 22:03:34,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291580876] [2020-07-21 22:03:34,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:03:34,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:03:34,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:03:34,783 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand 15 states. [2020-07-21 22:03:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:35,045 INFO L93 Difference]: Finished difference Result 125 states and 182 transitions. [2020-07-21 22:03:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:03:35,046 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2020-07-21 22:03:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:35,050 INFO L225 Difference]: With dead ends: 125 [2020-07-21 22:03:35,050 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 22:03:35,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 127 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:03:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 22:03:35,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-07-21 22:03:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 22:03:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2020-07-21 22:03:35,063 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 76 [2020-07-21 22:03:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:35,063 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2020-07-21 22:03:35,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:03:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2020-07-21 22:03:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 22:03:35,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:35,065 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:35,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:35,277 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:35,278 INFO L82 PathProgramCache]: Analyzing trace with hash -633873909, now seen corresponding path program 5 times [2020-07-21 22:03:35,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:35,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371593651] [2020-07-21 22:03:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:35,368 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:35,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:35,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:03:35,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 48 proven. 125 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2020-07-21 22:03:35,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:35,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:35,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:35,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:35,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:36,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:36,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:36,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 48 proven. 135 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2020-07-21 22:03:36,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371593651] [2020-07-21 22:03:36,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:36,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 22:03:36,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458651497] [2020-07-21 22:03:36,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:03:36,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:36,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:03:36,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:03:36,173 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand 17 states. [2020-07-21 22:03:36,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:36,388 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2020-07-21 22:03:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:03:36,388 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-07-21 22:03:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:36,391 INFO L225 Difference]: With dead ends: 76 [2020-07-21 22:03:36,391 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 22:03:36,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 163 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:03:36,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 22:03:36,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-07-21 22:03:36,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 22:03:36,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2020-07-21 22:03:36,402 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 96 [2020-07-21 22:03:36,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:36,403 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2020-07-21 22:03:36,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:03:36,404 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2020-07-21 22:03:36,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-21 22:03:36,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:36,405 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:36,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:36,619 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:36,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:36,620 INFO L82 PathProgramCache]: Analyzing trace with hash 542454743, now seen corresponding path program 6 times [2020-07-21 22:03:36,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:36,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253170291] [2020-07-21 22:03:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:36,713 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:36,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:36,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 91 conjunts are in the unsatisfiable core [2020-07-21 22:03:36,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-07-21 22:03:36,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-07-21 22:03:38,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253170291] [2020-07-21 22:03:38,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:38,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 32] total 45 [2020-07-21 22:03:38,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985887140] [2020-07-21 22:03:38,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-21 22:03:38,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-21 22:03:38,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 22:03:38,654 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand 45 states. [2020-07-21 22:03:41,292 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 26 [2020-07-21 22:03:46,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:46,149 INFO L93 Difference]: Finished difference Result 226 states and 327 transitions. [2020-07-21 22:03:46,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-07-21 22:03:46,150 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 102 [2020-07-21 22:03:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:46,153 INFO L225 Difference]: With dead ends: 226 [2020-07-21 22:03:46,153 INFO L226 Difference]: Without dead ends: 222 [2020-07-21 22:03:46,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 151 SyntacticMatches, 11 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3314 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1797, Invalid=10413, Unknown=0, NotChecked=0, Total=12210 [2020-07-21 22:03:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-21 22:03:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 183. [2020-07-21 22:03:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-21 22:03:46,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 260 transitions. [2020-07-21 22:03:46,186 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 260 transitions. Word has length 102 [2020-07-21 22:03:46,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:46,187 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 260 transitions. [2020-07-21 22:03:46,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-21 22:03:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 260 transitions. [2020-07-21 22:03:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 22:03:46,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:46,190 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:46,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:46,405 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:46,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1145252683, now seen corresponding path program 7 times [2020-07-21 22:03:46,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:46,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454892085] [2020-07-21 22:03:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:46,501 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:46,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:46,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:03:46,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 138 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-07-21 22:03:46,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:46,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:46,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:47,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:47,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:47,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:47,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:47,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:47,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 156 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-07-21 22:03:47,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454892085] [2020-07-21 22:03:47,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:47,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:03:47,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749354503] [2020-07-21 22:03:47,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:03:47,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:47,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:03:47,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:03:47,727 INFO L87 Difference]: Start difference. First operand 183 states and 260 transitions. Second operand 21 states. [2020-07-21 22:03:48,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:48,059 INFO L93 Difference]: Finished difference Result 216 states and 328 transitions. [2020-07-21 22:03:48,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:03:48,059 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 108 [2020-07-21 22:03:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:48,063 INFO L225 Difference]: With dead ends: 216 [2020-07-21 22:03:48,063 INFO L226 Difference]: Without dead ends: 195 [2020-07-21 22:03:48,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 179 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:03:48,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-21 22:03:48,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 172. [2020-07-21 22:03:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-21 22:03:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 247 transitions. [2020-07-21 22:03:48,088 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 247 transitions. Word has length 108 [2020-07-21 22:03:48,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:48,089 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 247 transitions. [2020-07-21 22:03:48,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:03:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 247 transitions. [2020-07-21 22:03:48,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-21 22:03:48,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:48,092 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 12, 11, 11, 11, 11, 11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:48,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:48,307 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:48,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:48,308 INFO L82 PathProgramCache]: Analyzing trace with hash 589762519, now seen corresponding path program 8 times [2020-07-21 22:03:48,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:48,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779733112] [2020-07-21 22:03:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:48,421 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:03:48,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:48,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:03:48,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 169 proven. 332 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-07-21 22:03:48,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:49,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:49,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:49,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:49,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:49,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:49,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:49,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:49,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 169 proven. 345 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-07-21 22:03:49,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779733112] [2020-07-21 22:03:49,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:49,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:03:49,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738031174] [2020-07-21 22:03:49,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:03:49,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:49,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:03:49,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:03:49,853 INFO L87 Difference]: Start difference. First operand 172 states and 247 transitions. Second operand 19 states. [2020-07-21 22:03:50,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:50,331 INFO L93 Difference]: Finished difference Result 282 states and 462 transitions. [2020-07-21 22:03:50,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 22:03:50,332 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 142 [2020-07-21 22:03:50,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:50,335 INFO L225 Difference]: With dead ends: 282 [2020-07-21 22:03:50,335 INFO L226 Difference]: Without dead ends: 184 [2020-07-21 22:03:50,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 251 SyntacticMatches, 15 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2020-07-21 22:03:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-21 22:03:50,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 161. [2020-07-21 22:03:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-21 22:03:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 224 transitions. [2020-07-21 22:03:50,356 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 224 transitions. Word has length 142 [2020-07-21 22:03:50,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:50,357 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 224 transitions. [2020-07-21 22:03:50,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:03:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 224 transitions. [2020-07-21 22:03:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-21 22:03:50,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:50,359 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 12, 11, 11, 11, 11, 11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:50,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:50,573 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:50,574 INFO L82 PathProgramCache]: Analyzing trace with hash -370212393, now seen corresponding path program 9 times [2020-07-21 22:03:50,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:50,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576990620] [2020-07-21 22:03:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:50,708 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:03:50,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:50,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:03:50,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 233 proven. 268 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-07-21 22:03:50,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:51,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:51,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:51,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:51,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:51,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:52,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:52,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:52,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:52,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 233 proven. 281 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-07-21 22:03:52,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576990620] [2020-07-21 22:03:52,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:52,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:03:52,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368721460] [2020-07-21 22:03:52,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:03:52,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:52,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:03:52,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:03:52,123 INFO L87 Difference]: Start difference. First operand 161 states and 224 transitions. Second operand 19 states. [2020-07-21 22:03:52,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:52,543 INFO L93 Difference]: Finished difference Result 252 states and 375 transitions. [2020-07-21 22:03:52,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 22:03:52,544 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 142 [2020-07-21 22:03:52,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:52,547 INFO L225 Difference]: With dead ends: 252 [2020-07-21 22:03:52,547 INFO L226 Difference]: Without dead ends: 182 [2020-07-21 22:03:52,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 251 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:03:52,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-21 22:03:52,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2020-07-21 22:03:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-07-21 22:03:52,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 215 transitions. [2020-07-21 22:03:52,571 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 215 transitions. Word has length 142 [2020-07-21 22:03:52,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:52,571 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 215 transitions. [2020-07-21 22:03:52,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:03:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 215 transitions. [2020-07-21 22:03:52,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-07-21 22:03:52,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:52,575 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:52,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:52,790 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:52,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:52,790 INFO L82 PathProgramCache]: Analyzing trace with hash -2107974185, now seen corresponding path program 10 times [2020-07-21 22:03:52,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:52,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006141324] [2020-07-21 22:03:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:52,983 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:52,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:52,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:03:52,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 115 proven. 396 refuted. 0 times theorem prover too weak. 1573 trivial. 0 not checked. [2020-07-21 22:03:53,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:53,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:53,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:53,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:53,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:54,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:54,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:54,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:54,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:54,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 115 proven. 416 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2020-07-21 22:03:54,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006141324] [2020-07-21 22:03:54,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:54,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:03:54,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594768967] [2020-07-21 22:03:54,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:03:54,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:54,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:03:54,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:03:54,877 INFO L87 Difference]: Start difference. First operand 158 states and 215 transitions. Second operand 21 states. [2020-07-21 22:03:55,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:55,178 INFO L93 Difference]: Finished difference Result 175 states and 232 transitions. [2020-07-21 22:03:55,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:03:55,179 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 182 [2020-07-21 22:03:55,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:55,182 INFO L225 Difference]: With dead ends: 175 [2020-07-21 22:03:55,182 INFO L226 Difference]: Without dead ends: 171 [2020-07-21 22:03:55,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 327 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:03:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-21 22:03:55,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 161. [2020-07-21 22:03:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-21 22:03:55,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 218 transitions. [2020-07-21 22:03:55,199 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 218 transitions. Word has length 182 [2020-07-21 22:03:55,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:55,200 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 218 transitions. [2020-07-21 22:03:55,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:03:55,200 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 218 transitions. [2020-07-21 22:03:55,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-07-21 22:03:55,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:55,202 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:55,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:55,416 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:55,417 INFO L82 PathProgramCache]: Analyzing trace with hash 836851019, now seen corresponding path program 11 times [2020-07-21 22:03:55,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:55,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240394405] [2020-07-21 22:03:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:55,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:55,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:55,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 175 conjunts are in the unsatisfiable core [2020-07-21 22:03:55,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2020-07-21 22:03:56,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-07-21 22:04:01,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240394405] [2020-07-21 22:04:01,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:04:01,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 58] total 75 [2020-07-21 22:04:01,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007500468] [2020-07-21 22:04:01,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-21 22:04:01,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:04:01,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-21 22:04:01,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=5282, Unknown=0, NotChecked=0, Total=5550 [2020-07-21 22:04:01,010 INFO L87 Difference]: Start difference. First operand 161 states and 218 transitions. Second operand 75 states. [2020-07-21 22:04:01,570 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 49 [2020-07-21 22:04:01,814 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 46 [2020-07-21 22:04:02,130 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 47 [2020-07-21 22:04:02,364 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 43 [2020-07-21 22:04:02,592 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 44 [2020-07-21 22:04:02,794 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 40 [2020-07-21 22:04:03,010 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 41 [2020-07-21 22:04:03,205 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 37 [2020-07-21 22:04:03,422 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 38 [2020-07-21 22:04:03,598 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2020-07-21 22:04:03,867 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 36 [2020-07-21 22:04:04,040 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2020-07-21 22:04:04,279 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 33 [2020-07-21 22:04:04,458 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 28 [2020-07-21 22:04:04,691 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 30 [2020-07-21 22:04:07,379 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 45 [2020-07-21 22:04:07,750 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 42 [2020-07-21 22:04:08,099 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 39 [2020-07-21 22:04:08,427 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 36 [2020-07-21 22:04:08,734 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 33 [2020-07-21 22:04:09,033 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 30 [2020-07-21 22:04:09,309 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 27 [2020-07-21 22:04:09,591 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 24 [2020-07-21 22:04:11,294 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 43 [2020-07-21 22:04:11,650 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 46 [2020-07-21 22:04:11,981 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 41 [2020-07-21 22:04:12,328 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 43 [2020-07-21 22:04:12,624 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 38 [2020-07-21 22:04:12,930 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 40 [2020-07-21 22:04:13,216 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 35 [2020-07-21 22:04:13,520 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 38 [2020-07-21 22:04:13,785 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 32 [2020-07-21 22:04:14,054 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 35 [2020-07-21 22:04:14,301 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 29 [2020-07-21 22:04:14,589 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 32 [2020-07-21 22:04:14,826 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 26 [2020-07-21 22:04:15,075 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 29 [2020-07-21 22:04:15,520 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 26 [2020-07-21 22:04:18,403 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 47 [2020-07-21 22:04:18,789 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 50 [2020-07-21 22:04:19,166 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 44 [2020-07-21 22:04:19,538 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 46 [2020-07-21 22:04:19,863 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 41 [2020-07-21 22:04:20,217 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 43 [2020-07-21 22:04:20,531 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 38 [2020-07-21 22:04:20,852 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 40 [2020-07-21 22:04:21,151 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 35 [2020-07-21 22:04:21,460 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 37 [2020-07-21 22:04:21,742 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 32 [2020-07-21 22:04:22,037 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 34 [2020-07-21 22:04:22,308 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 30 [2020-07-21 22:04:22,604 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 31 [2020-07-21 22:04:22,824 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 22:04:23,055 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2020-07-21 22:04:23,465 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 22:04:24,377 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-07-21 22:04:24,918 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2020-07-21 22:04:25,381 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2020-07-21 22:04:26,155 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2020-07-21 22:04:27,621 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2020-07-21 22:04:28,600 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2020-07-21 22:04:28,935 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2020-07-21 22:04:29,371 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 50 [2020-07-21 22:04:29,724 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2020-07-21 22:04:30,161 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 47 [2020-07-21 22:04:30,872 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2020-07-21 22:04:31,291 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 50 [2020-07-21 22:04:31,553 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 7 [2020-07-21 22:04:32,321 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 47 [2020-07-21 22:04:32,681 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 44 [2020-07-21 22:04:33,008 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2020-07-21 22:04:33,337 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2020-07-21 22:04:33,734 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 23 [2020-07-21 22:04:34,733 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2020-07-21 22:04:35,329 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2020-07-21 22:04:37,559 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-07-21 22:04:37,800 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-07-21 22:04:38,191 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 41 [2020-07-21 22:04:38,682 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 38 [2020-07-21 22:04:39,027 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 44 [2020-07-21 22:04:39,517 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 29 [2020-07-21 22:04:39,995 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 35 [2020-07-21 22:04:41,163 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 32 [2020-07-21 22:04:41,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:04:41,232 INFO L93 Difference]: Finished difference Result 528 states and 796 transitions. [2020-07-21 22:04:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-07-21 22:04:41,233 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 188 [2020-07-21 22:04:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:04:41,240 INFO L225 Difference]: With dead ends: 528 [2020-07-21 22:04:41,240 INFO L226 Difference]: Without dead ends: 524 [2020-07-21 22:04:41,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 280 SyntacticMatches, 24 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16626 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=8020, Invalid=46970, Unknown=0, NotChecked=0, Total=54990 [2020-07-21 22:04:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-07-21 22:04:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 441. [2020-07-21 22:04:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-07-21 22:04:41,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 635 transitions. [2020-07-21 22:04:41,308 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 635 transitions. Word has length 188 [2020-07-21 22:04:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:04:41,308 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 635 transitions. [2020-07-21 22:04:41,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-21 22:04:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 635 transitions. [2020-07-21 22:04:41,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-07-21 22:04:41,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:04:41,314 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:04:41,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:41,528 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:04:41,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:04:41,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1322769943, now seen corresponding path program 12 times [2020-07-21 22:04:41,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:04:41,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760610952] [2020-07-21 22:04:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:41,722 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:04:41,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:04:41,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:04:41,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:04:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 415 refuted. 0 times theorem prover too weak. 1592 trivial. 0 not checked. [2020-07-21 22:04:41,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:42,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:42,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:42,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:42,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:42,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:42,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:44,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:44,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:44,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:44,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:44,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:44,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 447 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2020-07-21 22:04:44,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760610952] [2020-07-21 22:04:44,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:04:44,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 22:04:44,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134897165] [2020-07-21 22:04:44,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 22:04:44,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:04:44,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 22:04:44,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:04:44,525 INFO L87 Difference]: Start difference. First operand 441 states and 635 transitions. Second operand 25 states. [2020-07-21 22:04:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:04:45,113 INFO L93 Difference]: Finished difference Result 502 states and 783 transitions. [2020-07-21 22:04:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:04:45,115 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 194 [2020-07-21 22:04:45,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:04:45,121 INFO L225 Difference]: With dead ends: 502 [2020-07-21 22:04:45,121 INFO L226 Difference]: Without dead ends: 478 [2020-07-21 22:04:45,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 343 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 22:04:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-07-21 22:04:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 427. [2020-07-21 22:04:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-07-21 22:04:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 618 transitions. [2020-07-21 22:04:45,175 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 618 transitions. Word has length 194 [2020-07-21 22:04:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:04:45,175 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 618 transitions. [2020-07-21 22:04:45,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 22:04:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 618 transitions. [2020-07-21 22:04:45,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-21 22:04:45,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:04:45,180 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:04:45,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:45,396 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:04:45,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:04:45,397 INFO L82 PathProgramCache]: Analyzing trace with hash -547968693, now seen corresponding path program 13 times [2020-07-21 22:04:45,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:04:45,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37253769] [2020-07-21 22:04:45,397 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:45,725 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:04:45,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:04:45,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:04:45,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:04:46,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1087 refuted. 0 times theorem prover too weak. 7431 trivial. 0 not checked. [2020-07-21 22:04:46,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:46,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:46,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:46,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:46,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:46,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:48,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:48,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:48,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:48,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:49,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:49,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:49,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:49,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:49,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1121 refuted. 0 times theorem prover too weak. 7397 trivial. 0 not checked. [2020-07-21 22:04:49,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37253769] [2020-07-21 22:04:49,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:04:49,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 22:04:49,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472967170] [2020-07-21 22:04:49,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 22:04:49,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:04:49,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 22:04:49,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:04:49,378 INFO L87 Difference]: Start difference. First operand 427 states and 618 transitions. Second operand 25 states. [2020-07-21 22:04:49,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:04:49,886 INFO L93 Difference]: Finished difference Result 478 states and 724 transitions. [2020-07-21 22:04:49,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:04:49,887 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 348 [2020-07-21 22:04:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:04:49,894 INFO L225 Difference]: With dead ends: 478 [2020-07-21 22:04:49,894 INFO L226 Difference]: Without dead ends: 443 [2020-07-21 22:04:49,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 651 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 22:04:49,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-07-21 22:04:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 394. [2020-07-21 22:04:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-07-21 22:04:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 572 transitions. [2020-07-21 22:04:49,959 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 572 transitions. Word has length 348 [2020-07-21 22:04:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:04:49,962 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 572 transitions. [2020-07-21 22:04:49,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 22:04:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 572 transitions. [2020-07-21 22:04:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-21 22:04:49,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:04:49,970 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:04:50,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:50,185 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:04:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:04:50,185 INFO L82 PathProgramCache]: Analyzing trace with hash -604098025, now seen corresponding path program 14 times [2020-07-21 22:04:50,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:04:50,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045857823] [2020-07-21 22:04:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:50,561 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:04:50,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:04:50,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 339 conjunts are in the unsatisfiable core [2020-07-21 22:04:50,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:04:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 2940 refuted. 0 times theorem prover too weak. 5854 trivial. 0 not checked. [2020-07-21 22:04:51,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 8644 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-07-21 22:05:08,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045857823] [2020-07-21 22:05:08,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:08,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 108] total 129 [2020-07-21 22:05:08,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453039825] [2020-07-21 22:05:08,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2020-07-21 22:05:08,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:08,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2020-07-21 22:05:08,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=16060, Unknown=0, NotChecked=0, Total=16512 [2020-07-21 22:05:08,470 INFO L87 Difference]: Start difference. First operand 394 states and 572 transitions. Second operand 129 states. [2020-07-21 22:05:09,037 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 6 [2020-07-21 22:05:09,958 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 97 [2020-07-21 22:05:10,710 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 94 [2020-07-21 22:05:11,518 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 95 [2020-07-21 22:05:12,191 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 91 [2020-07-21 22:05:12,916 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 92 [2020-07-21 22:05:13,548 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 88 [2020-07-21 22:05:14,279 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 89 [2020-07-21 22:05:14,885 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 85 [2020-07-21 22:05:15,567 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 86 [2020-07-21 22:05:16,179 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 82 [2020-07-21 22:05:16,844 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 83 [2020-07-21 22:05:17,427 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 79 [2020-07-21 22:05:18,182 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 80 [2020-07-21 22:05:18,761 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 76 [2020-07-21 22:05:19,498 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 77 [2020-07-21 22:05:20,059 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 73 [2020-07-21 22:05:20,798 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 74 [2020-07-21 22:05:21,419 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 70 [2020-07-21 22:05:22,150 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 71 [2020-07-21 22:05:22,651 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 67 [2020-07-21 22:05:23,312 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 68 [2020-07-21 22:05:23,804 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 64 [2020-07-21 22:05:24,433 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 65 [2020-07-21 22:05:24,919 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 61 [2020-07-21 22:05:25,596 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 62 [2020-07-21 22:05:26,092 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 58 [2020-07-21 22:05:26,694 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 59 [2020-07-21 22:05:27,138 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 55 [2020-07-21 22:05:27,724 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 56 [2020-07-21 22:05:28,167 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 52 [2020-07-21 22:05:28,737 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 53 [2020-07-21 22:05:29,160 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 49 [2020-07-21 22:05:29,736 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 50 [2020-07-21 22:05:30,120 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 46 [2020-07-21 22:05:30,642 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 47 [2020-07-21 22:05:30,991 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 43 [2020-07-21 22:05:31,475 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 44 [2020-07-21 22:05:31,821 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-07-21 22:05:32,300 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 41 [2020-07-21 22:05:32,643 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 37 [2020-07-21 22:05:33,110 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 38 [2020-07-21 22:05:33,408 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 34 [2020-07-21 22:05:33,839 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 35 [2020-07-21 22:05:34,169 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 31 [2020-07-21 22:05:34,611 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 32 [2020-07-21 22:05:34,893 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2020-07-21 22:05:35,288 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 29 [2020-07-21 22:05:35,560 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 25 [2020-07-21 22:05:35,948 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 26 [2020-07-21 22:05:40,420 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 89 [2020-07-21 22:05:41,502 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 86 [2020-07-21 22:05:42,580 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 83 [2020-07-21 22:05:43,606 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 80 [2020-07-21 22:05:44,562 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 77 [2020-07-21 22:05:45,505 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 74 [2020-07-21 22:05:46,391 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 71 [2020-07-21 22:05:47,268 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 68 [2020-07-21 22:05:48,136 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 65 [2020-07-21 22:05:48,980 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 62 [2020-07-21 22:05:49,811 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 59 [2020-07-21 22:05:50,590 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 56 [2020-07-21 22:05:51,356 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 53 [2020-07-21 22:05:52,062 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 51 [2020-07-21 22:05:52,721 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 48 [2020-07-21 22:05:53,350 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 45 [2020-07-21 22:05:53,967 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 42 [2020-07-21 22:05:54,568 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 39 [2020-07-21 22:05:55,132 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 36 [2020-07-21 22:05:55,673 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 33 [2020-07-21 22:05:56,229 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 30 [2020-07-21 22:05:56,770 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 27 [2020-07-21 22:05:57,309 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 24 [2020-07-21 22:05:57,956 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2020-07-21 22:06:01,172 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 89 [2020-07-21 22:06:02,276 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 91 [2020-07-21 22:06:03,344 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 86 [2020-07-21 22:06:04,409 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 88 [2020-07-21 22:06:05,455 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 83 [2020-07-21 22:06:06,529 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 86 [2020-07-21 22:06:07,587 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 80 [2020-07-21 22:06:08,643 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 83 [2020-07-21 22:06:09,677 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 77 [2020-07-21 22:06:10,700 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 80 [2020-07-21 22:06:11,730 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 74 [2020-07-21 22:06:12,747 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 77 [2020-07-21 22:06:13,705 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 71 [2020-07-21 22:06:14,697 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 74 [2020-07-21 22:06:15,649 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 68 [2020-07-21 22:06:16,648 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 71 [2020-07-21 22:06:17,500 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 65 [2020-07-21 22:06:18,323 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 68 [2020-07-21 22:06:19,140 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 62 [2020-07-21 22:06:19,961 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 65 [2020-07-21 22:06:20,725 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 59 [2020-07-21 22:06:21,527 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 62 [2020-07-21 22:06:22,263 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 56 [2020-07-21 22:06:23,019 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 59 [2020-07-21 22:06:23,800 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 53 [2020-07-21 22:06:24,625 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 56 [2020-07-21 22:06:25,399 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 51 [2020-07-21 22:06:26,189 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 53 [2020-07-21 22:06:26,897 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 48 [2020-07-21 22:06:27,623 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 50 [2020-07-21 22:06:28,254 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 45 [2020-07-21 22:06:28,908 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 47 [2020-07-21 22:06:29,508 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 42 [2020-07-21 22:06:30,125 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 44 [2020-07-21 22:06:30,701 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 39 [2020-07-21 22:06:31,291 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 41 [2020-07-21 22:06:31,839 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 36 [2020-07-21 22:06:32,446 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 38 [2020-07-21 22:06:32,956 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 33 [2020-07-21 22:06:33,508 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-07-21 22:06:34,062 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 30 [2020-07-21 22:06:34,650 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 32 [2020-07-21 22:06:35,238 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 27 [2020-07-21 22:06:35,787 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 29 [2020-07-21 22:06:36,296 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 24 [2020-07-21 22:06:36,816 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 26 [2020-07-21 22:06:37,322 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2020-07-21 22:06:37,826 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 23 [2020-07-21 22:06:38,287 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 18 [2020-07-21 22:06:38,780 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 20 [2020-07-21 22:06:40,577 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2020-07-21 22:06:41,352 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-07-21 22:06:42,813 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2020-07-21 22:06:44,145 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 248 DAG size of output: 92 [2020-07-21 22:06:45,482 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 258 DAG size of output: 94 [2020-07-21 22:06:46,764 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 89 [2020-07-21 22:06:47,917 WARN L193 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 91 [2020-07-21 22:06:49,047 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 86 [2020-07-21 22:06:50,177 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 88 [2020-07-21 22:06:51,278 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 83 [2020-07-21 22:06:52,389 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 85 [2020-07-21 22:06:53,450 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 80 [2020-07-21 22:06:54,538 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 82 [2020-07-21 22:06:55,548 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 78 [2020-07-21 22:06:56,576 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 79 [2020-07-21 22:06:57,679 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 75 [2020-07-21 22:06:58,809 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 76 [2020-07-21 22:06:59,783 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 72 [2020-07-21 22:07:00,764 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 74 [2020-07-21 22:07:01,709 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 69 [2020-07-21 22:07:02,663 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 71 [2020-07-21 22:07:03,610 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 66 [2020-07-21 22:07:04,627 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 68 [2020-07-21 22:07:05,657 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 63 [2020-07-21 22:07:06,653 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 65 [2020-07-21 22:07:07,685 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 60 [2020-07-21 22:07:08,668 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 62 [2020-07-21 22:07:09,602 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 57 [2020-07-21 22:07:10,542 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 59 [2020-07-21 22:07:11,494 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 54 [2020-07-21 22:07:12,443 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 56 [2020-07-21 22:07:13,396 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 51 [2020-07-21 22:07:14,318 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 53 [2020-07-21 22:07:15,156 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 48 [2020-07-21 22:07:16,146 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 50 [2020-07-21 22:07:16,888 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 45 [2020-07-21 22:07:17,641 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 47 [2020-07-21 22:07:18,336 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 42 [2020-07-21 22:07:19,048 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 44 [2020-07-21 22:07:19,684 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 39 [2020-07-21 22:07:20,359 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 41 [2020-07-21 22:07:20,971 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 36 [2020-07-21 22:07:21,602 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 38 [2020-07-21 22:07:22,237 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 33 [2020-07-21 22:07:22,905 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 35 [2020-07-21 22:07:23,554 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 30 [2020-07-21 22:07:24,224 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 32 [2020-07-21 22:07:24,782 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 22:07:25,369 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-07-21 22:07:25,909 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-07-21 22:07:26,414 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 22:07:28,790 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2020-07-21 22:07:29,276 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2020-07-21 22:07:29,773 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-07-21 22:07:30,230 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 22:07:30,747 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-07-21 22:07:31,183 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2020-07-21 22:07:31,659 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-07-21 22:07:32,156 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-07-21 22:07:32,687 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-07-21 22:07:33,267 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 33 [2020-07-21 22:07:36,102 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2020-07-21 22:07:37,728 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2020-07-21 22:07:39,378 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2020-07-21 22:07:41,169 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 29 [2020-07-21 22:07:42,179 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2020-07-21 22:07:43,232 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2020-07-21 22:07:44,640 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2020-07-21 22:07:45,830 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 62 [2020-07-21 22:07:47,107 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 44 [2020-07-21 22:07:48,115 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 47 [2020-07-21 22:07:49,172 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 53 [2020-07-21 22:07:50,270 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 50 [2020-07-21 22:07:51,126 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2020-07-21 22:07:52,329 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 56 [2020-07-21 22:07:53,745 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 65 [2020-07-21 22:07:55,278 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 195 DAG size of output: 86 [2020-07-21 22:07:56,907 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 68 [2020-07-21 22:07:58,371 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 71 [2020-07-21 22:08:00,004 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 77 [2020-07-21 22:08:01,429 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 74 [2020-07-21 22:08:02,524 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 59 [2020-07-21 22:08:03,895 WARN L193 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 80 [2020-07-21 22:08:05,320 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 202 DAG size of output: 89 [2020-07-21 22:08:07,054 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 210 DAG size of output: 92 [2020-07-21 22:08:08,560 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 219 DAG size of output: 95 [2020-07-21 22:08:10,188 WARN L193 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 83 [2020-07-21 22:08:12,036 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 228 DAG size of output: 98 [2020-07-21 22:08:13,015 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 33 [2020-07-21 22:08:13,678 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2020-07-21 22:08:15,846 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 258 DAG size of output: 94 [2020-07-21 22:08:17,736 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 267 DAG size of output: 97 [2020-07-21 22:08:19,989 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 250 DAG size of output: 91 [2020-07-21 22:08:21,625 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 259 DAG size of output: 94 [2020-07-21 22:08:23,410 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 243 DAG size of output: 88 [2020-07-21 22:08:25,137 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 251 DAG size of output: 91 [2020-07-21 22:08:26,734 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 237 DAG size of output: 85 [2020-07-21 22:08:28,347 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 244 DAG size of output: 88 [2020-07-21 22:08:30,034 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 230 DAG size of output: 82 [2020-07-21 22:08:31,610 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 238 DAG size of output: 85 [2020-07-21 22:08:33,185 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 222 DAG size of output: 79 [2020-07-21 22:08:34,774 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 231 DAG size of output: 82 [2020-07-21 22:08:36,454 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 217 DAG size of output: 76 [2020-07-21 22:08:38,028 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 223 DAG size of output: 79 [2020-07-21 22:08:39,574 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 211 DAG size of output: 73 [2020-07-21 22:08:41,446 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 218 DAG size of output: 76 [2020-07-21 22:08:43,284 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 202 DAG size of output: 70 [2020-07-21 22:08:45,297 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 257 DAG size of output: 95 [2020-07-21 22:08:46,918 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 212 DAG size of output: 73 [2020-07-21 22:08:48,632 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 265 DAG size of output: 98 [2020-07-21 22:08:50,057 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 67 [2020-07-21 22:08:51,476 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 203 DAG size of output: 70 [2020-07-21 22:08:53,197 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 249 DAG size of output: 92 [2020-07-21 22:08:54,601 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 64 [2020-07-21 22:08:55,970 WARN L193 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 67 [2020-07-21 22:08:57,632 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 242 DAG size of output: 89 [2020-07-21 22:08:58,982 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 61 [2020-07-21 22:09:00,428 WARN L193 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 64 [2020-07-21 22:09:02,102 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 236 DAG size of output: 86 [2020-07-21 22:09:03,514 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 58 [2020-07-21 22:09:04,824 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 61 [2020-07-21 22:09:06,708 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 229 DAG size of output: 83 [2020-07-21 22:09:08,142 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 55 [2020-07-21 22:09:09,485 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 58 [2020-07-21 22:09:11,213 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 221 DAG size of output: 80 [2020-07-21 22:09:12,590 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 53 [2020-07-21 22:09:13,844 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 55 [2020-07-21 22:09:15,572 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 216 DAG size of output: 77 [2020-07-21 22:09:16,780 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 51 [2020-07-21 22:09:17,926 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 53 [2020-07-21 22:09:19,210 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 48 [2020-07-21 22:09:20,519 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 51 [2020-07-21 22:09:22,106 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 45 [2020-07-21 22:09:23,432 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 48 [2020-07-21 22:09:24,868 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2020-07-21 22:09:25,977 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 45 [2020-07-21 22:09:27,299 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2020-07-21 22:09:28,222 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2020-07-21 22:09:29,933 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-21 22:09:30,520 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2020-07-21 22:09:31,448 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-07-21 22:09:32,241 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2020-07-21 22:09:33,084 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-07-21 22:09:37,270 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2020-07-21 22:09:38,415 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2020-07-21 22:09:40,484 WARN L193 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 41 [2020-07-21 22:09:42,631 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 216 DAG size of output: 89 [2020-07-21 22:09:44,086 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 50 [2020-07-21 22:09:45,632 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2020-07-21 22:09:47,645 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 225 DAG size of output: 92 [2020-07-21 22:09:48,935 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 44 [2020-07-21 22:09:49,823 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 14 [2020-07-21 22:09:50,358 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2020-07-21 22:09:51,398 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2020-07-21 22:09:52,355 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 17 [2020-07-21 22:09:53,725 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 50 [2020-07-21 22:09:54,572 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-07-21 22:09:55,049 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2020-07-21 22:09:55,894 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 11 [2020-07-21 22:09:57,322 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 47 [2020-07-21 22:09:58,409 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-07-21 22:09:59,486 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 20 [2020-07-21 22:10:01,652 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 53 [2020-07-21 22:10:02,975 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-07-21 22:10:04,997 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2020-07-21 22:10:06,830 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 23 [2020-07-21 22:10:08,523 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 199 DAG size of output: 83 [2020-07-21 22:10:10,295 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 62 [2020-07-21 22:10:11,972 WARN L193 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 65 [2020-07-21 22:10:13,192 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 29 [2020-07-21 22:10:14,894 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 164 DAG size of output: 68 [2020-07-21 22:10:17,135 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 177 DAG size of output: 74 [2020-07-21 22:10:18,918 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 171 DAG size of output: 71 [2020-07-21 22:10:20,516 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 59 [2020-07-21 22:10:21,766 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 53 [2020-07-21 22:10:23,609 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 185 DAG size of output: 77 [2020-07-21 22:10:24,906 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2020-07-21 22:10:26,752 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 207 DAG size of output: 86 [2020-07-21 22:11:09,598 WARN L193 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 230 DAG size of output: 98 [2020-07-21 22:11:10,980 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 223 DAG size of output: 7 [2020-07-21 22:11:11,941 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 6 [2020-07-21 22:11:12,858 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 22:11:15,644 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 221 DAG size of output: 95 [2020-07-21 22:11:18,076 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 212 DAG size of output: 92 [2020-07-21 22:11:20,387 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 204 DAG size of output: 89 [2020-07-21 22:11:22,770 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 197 DAG size of output: 86 [2020-07-21 22:11:25,079 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 190 DAG size of output: 83 [2020-07-21 22:11:27,439 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 182 DAG size of output: 80 [2020-07-21 22:11:30,125 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 176 DAG size of output: 77 [2020-07-21 22:11:32,309 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 169 DAG size of output: 74 [2020-07-21 22:11:35,702 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 56 [2020-07-21 22:11:38,526 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 160 DAG size of output: 71 [2020-07-21 22:11:40,979 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 152 DAG size of output: 68 [2020-07-21 22:11:43,441 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 146 DAG size of output: 65 [2020-07-21 22:11:45,583 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 139 DAG size of output: 62 [2020-07-21 22:11:47,740 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 131 DAG size of output: 59 [2020-07-21 22:11:50,401 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2020-07-21 22:11:52,455 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 134 DAG size of output: 56 [2020-07-21 22:11:54,854 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 192 DAG size of output: 80 [2020-07-21 22:11:57,284 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-07-21 22:12:04,991 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 22:12:05,795 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 22:12:06,676 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 22:12:07,485 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 22:12:08,348 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 22:12:09,165 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 22:12:10,034 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-21 22:12:11,010 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 8 [2020-07-21 22:12:12,893 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2020-07-21 22:12:14,292 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2020-07-21 22:12:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:12:14,759 INFO L93 Difference]: Finished difference Result 1231 states and 2149 transitions. [2020-07-21 22:12:14,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2020-07-21 22:12:14,765 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 354 [2020-07-21 22:12:14,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:12:14,780 INFO L225 Difference]: With dead ends: 1231 [2020-07-21 22:12:14,781 INFO L226 Difference]: Without dead ends: 1227 [2020-07-21 22:12:14,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1097 GetRequests, 490 SyntacticMatches, 92 SemanticMatches, 515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88079 ImplicationChecksByTransitivity, 326.4s TimeCoverageRelationStatistics Valid=38389, Invalid=228383, Unknown=0, NotChecked=0, Total=266772 [2020-07-21 22:12:14,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2020-07-21 22:12:14,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1036. [2020-07-21 22:12:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1036 states. [2020-07-21 22:12:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1613 transitions. [2020-07-21 22:12:14,971 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1613 transitions. Word has length 354 [2020-07-21 22:12:14,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:12:14,972 INFO L479 AbstractCegarLoop]: Abstraction has 1036 states and 1613 transitions. [2020-07-21 22:12:14,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 129 states. [2020-07-21 22:12:14,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1613 transitions. [2020-07-21 22:12:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-07-21 22:12:14,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:12:14,983 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:12:15,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:12:15,196 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:12:15,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:12:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash 800684683, now seen corresponding path program 15 times [2020-07-21 22:12:15,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:12:15,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245787667] [2020-07-21 22:12:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:12:15,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:12:15,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:12:15,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 22:12:15,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:12:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1112 refuted. 0 times theorem prover too weak. 7456 trivial. 0 not checked. [2020-07-21 22:12:16,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:12:19,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:19,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:20,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:20,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:20,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:21,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:21,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:21,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:28,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:28,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:29,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:29,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:30,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:30,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:31,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:31,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:31,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1162 refuted. 0 times theorem prover too weak. 7406 trivial. 0 not checked. [2020-07-21 22:12:31,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245787667] [2020-07-21 22:12:31,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:12:31,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 22:12:31,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966262747] [2020-07-21 22:12:31,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 22:12:31,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:12:31,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 22:12:31,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:12:31,733 INFO L87 Difference]: Start difference. First operand 1036 states and 1613 transitions. Second operand 29 states. [2020-07-21 22:12:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:12:33,882 INFO L93 Difference]: Finished difference Result 1221 states and 2313 transitions. [2020-07-21 22:12:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 22:12:33,890 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 360 [2020-07-21 22:12:33,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:12:33,911 INFO L225 Difference]: With dead ends: 1221 [2020-07-21 22:12:33,911 INFO L226 Difference]: Without dead ends: 1194 [2020-07-21 22:12:33,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 667 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=319, Invalid=1321, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 22:12:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2020-07-21 22:12:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1024. [2020-07-21 22:12:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-07-21 22:12:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1655 transitions. [2020-07-21 22:12:34,115 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1655 transitions. Word has length 360 [2020-07-21 22:12:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:12:34,116 INFO L479 AbstractCegarLoop]: Abstraction has 1024 states and 1655 transitions. [2020-07-21 22:12:34,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 22:12:34,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1655 transitions. [2020-07-21 22:12:34,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2020-07-21 22:12:34,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:12:34,131 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:12:34,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:12:34,344 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:12:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:12:34,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2099436055, now seen corresponding path program 16 times [2020-07-21 22:12:34,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:12:34,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094094698] [2020-07-21 22:12:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:12:35,272 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:12:35,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:12:35,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 3210 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 22:12:35,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:12:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 537 proven. 2750 refuted. 0 times theorem prover too weak. 32675 trivial. 0 not checked. [2020-07-21 22:12:36,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:12:38,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:38,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:39,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:39,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:39,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:42,506 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 22:12:42,612 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 22:12:44,224 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 22:12:44,330 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 22:12:44,450 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:12:44,567 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:12:44,679 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:12:44,782 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 22:12:55,518 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 22:12:56,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:01,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:01,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:03,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:03,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:04,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:04,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:05,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:05,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:05,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 537 proven. 2802 refuted. 0 times theorem prover too weak. 32623 trivial. 0 not checked. [2020-07-21 22:13:06,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094094698] [2020-07-21 22:13:06,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:13:06,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 22:13:06,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063603720] [2020-07-21 22:13:06,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 22:13:06,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:13:06,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 22:13:06,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:13:06,423 INFO L87 Difference]: Start difference. First operand 1024 states and 1655 transitions. Second operand 29 states. [2020-07-21 22:13:09,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:13:09,563 INFO L93 Difference]: Finished difference Result 1151 states and 2127 transitions. [2020-07-21 22:13:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 22:13:09,573 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 674 [2020-07-21 22:13:09,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:13:09,590 INFO L225 Difference]: With dead ends: 1151 [2020-07-21 22:13:09,590 INFO L226 Difference]: Without dead ends: 1107 [2020-07-21 22:13:09,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1359 GetRequests, 1295 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=325, Invalid=1315, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 22:13:09,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2020-07-21 22:13:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 982. [2020-07-21 22:13:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2020-07-21 22:13:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1611 transitions. [2020-07-21 22:13:09,757 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1611 transitions. Word has length 674 [2020-07-21 22:13:09,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:13:09,759 INFO L479 AbstractCegarLoop]: Abstraction has 982 states and 1611 transitions. [2020-07-21 22:13:09,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 22:13:09,759 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1611 transitions. [2020-07-21 22:13:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2020-07-21 22:13:09,779 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:13:09,779 INFO L422 BasicCegarLoop]: trace histogram [159, 159, 80, 79, 79, 79, 79, 79, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:13:09,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:13:09,993 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:13:09,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:13:09,994 INFO L82 PathProgramCache]: Analyzing trace with hash 886558859, now seen corresponding path program 17 times [2020-07-21 22:13:09,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:13:09,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217286238] [2020-07-21 22:13:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:13:10,763 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:13:10,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:13:10,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 3142 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 22:13:10,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:13:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 56486 backedges. 3559 proven. 4270 refuted. 0 times theorem prover too weak. 48657 trivial. 0 not checked. [2020-07-21 22:13:12,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:13:14,764 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:13:14,871 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 22:13:14,981 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 22:13:15,097 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 22:13:19,401 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:13:19,506 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:13:22,819 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:13:22,923 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:13:25,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:27,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:30,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:30,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:31,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:31,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:32,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:32,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:32,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:33,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:34,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:42,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:44,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:44,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:45,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:45,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:45,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:45,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:46,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:13:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 56486 backedges. 3559 proven. 4332 refuted. 0 times theorem prover too weak. 48595 trivial. 0 not checked. [2020-07-21 22:13:46,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217286238] [2020-07-21 22:13:46,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:13:46,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 31 [2020-07-21 22:13:46,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537825718] [2020-07-21 22:13:46,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-21 22:13:46,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:13:46,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-21 22:13:46,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2020-07-21 22:13:46,452 INFO L87 Difference]: Start difference. First operand 982 states and 1611 transitions. Second operand 31 states. [2020-07-21 22:13:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:13:49,769 INFO L93 Difference]: Finished difference Result 2096 states and 3998 transitions. [2020-07-21 22:13:49,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-21 22:13:49,776 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 840 [2020-07-21 22:13:49,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:13:49,792 INFO L225 Difference]: With dead ends: 2096 [2020-07-21 22:13:49,792 INFO L226 Difference]: Without dead ends: 1412 [2020-07-21 22:13:49,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1700 GetRequests, 1623 SyntacticMatches, 27 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2020-07-21 22:13:49,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2020-07-21 22:13:49,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1073. [2020-07-21 22:13:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1073 states. [2020-07-21 22:13:49,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1453 transitions. [2020-07-21 22:13:49,983 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1453 transitions. Word has length 840 [2020-07-21 22:13:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:13:49,985 INFO L479 AbstractCegarLoop]: Abstraction has 1073 states and 1453 transitions. [2020-07-21 22:13:49,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-21 22:13:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1453 transitions. [2020-07-21 22:13:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2020-07-21 22:13:49,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:13:49,997 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:13:50,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:13:50,213 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:13:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:13:50,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2092966539, now seen corresponding path program 18 times [2020-07-21 22:13:50,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:13:50,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581321909] [2020-07-21 22:13:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:13:50,853 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:13:50,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:13:50,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 3224 conjuncts, 663 conjunts are in the unsatisfiable core [2020-07-21 22:13:50,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:13:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 35990 backedges. 0 proven. 12010 refuted. 0 times theorem prover too weak. 23980 trivial. 0 not checked. [2020-07-21 22:13:55,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 35990 backedges. 0 proven. 35698 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-07-21 22:16:56,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581321909] [2020-07-21 22:16:56,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:56,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 206] total 231 [2020-07-21 22:16:56,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924798305] [2020-07-21 22:16:56,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 231 states [2020-07-21 22:16:56,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:56,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 231 interpolants. [2020-07-21 22:16:56,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=52346, Unknown=0, NotChecked=0, Total=53130 [2020-07-21 22:16:56,527 INFO L87 Difference]: Start difference. First operand 1073 states and 1453 transitions. Second operand 231 states.