/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:59:46,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:59:46,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:59:46,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:59:46,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:59:46,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:59:46,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:59:46,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:59:46,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:59:46,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:59:46,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:59:46,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:59:46,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:59:46,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:59:46,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:59:46,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:59:46,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:59:46,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:59:46,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:59:46,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:59:46,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:59:46,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:59:46,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:59:46,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:59:46,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:59:46,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:59:46,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:59:46,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:59:46,992 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:59:47,006 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:59:47,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:59:47,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:59:47,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:59:47,008 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:59:47,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:59:47,008 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:59:47,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:59:47,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:59:47,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:59:47,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:59:47,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:59:47,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:59:47,010 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:59:47,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:59:47,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:59:47,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:59:47,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:59:47,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:59:47,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:59:47,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:59:47,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:59:47,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:59:47,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:59:47,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:59:47,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:59:47,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:47,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:59:47,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:59:47,013 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 -> NOT_INCREMENTALLY [2020-07-20 11:59:47,284 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:59:47,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:59:47,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:59:47,310 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:59:47,311 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:59:47,312 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2020-07-20 11:59:47,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2b9eab79/8d2e7efedacc4b21bb83fe7266943e91/FLAG77e1ed72b [2020-07-20 11:59:47,833 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:59:47,833 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2020-07-20 11:59:47,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2b9eab79/8d2e7efedacc4b21bb83fe7266943e91/FLAG77e1ed72b [2020-07-20 11:59:48,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2b9eab79/8d2e7efedacc4b21bb83fe7266943e91 [2020-07-20 11:59:48,228 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:59:48,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:59:48,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:59:48,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:59:48,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:59:48,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:59:48" (1/1) ... [2020-07-20 11:59:48,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aedddac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:59:48, skipping insertion in model container [2020-07-20 11:59:48,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:59:48" (1/1) ... [2020-07-20 11:59:48,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:59:48,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:59:48,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:59:48,456 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:59:48,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:59:48,486 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:59:48,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:59:48 WrapperNode [2020-07-20 11:59:48,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:59:48,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:59:48,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:59:48,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:59:48,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:59:48" (1/1) ... [2020-07-20 11:59:48,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:59:48" (1/1) ... [2020-07-20 11:59:48,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:59:48" (1/1) ... [2020-07-20 11:59:48,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:59:48" (1/1) ... [2020-07-20 11:59:48,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:59:48" (1/1) ... [2020-07-20 11:59:48,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:59:48" (1/1) ... [2020-07-20 11:59:48,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:59:48" (1/1) ... [2020-07-20 11:59:48,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:59:48,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:59:48,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:59:48,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:59:48,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:59:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:59:48,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:59:48,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:59:48,664 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:59:48,664 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:59:48,665 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:59:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:59:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:59:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:59:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:59:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:59:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:59:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:59:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:59:48,906 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:59:48,907 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 11:59:48,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:59:48 BoogieIcfgContainer [2020-07-20 11:59:48,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:59:48,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:59:48,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:59:48,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:59:48,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:59:48" (1/3) ... [2020-07-20 11:59:48,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c67706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:59:48, skipping insertion in model container [2020-07-20 11:59:48,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:59:48" (2/3) ... [2020-07-20 11:59:48,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c67706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:59:48, skipping insertion in model container [2020-07-20 11:59:48,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:59:48" (3/3) ... [2020-07-20 11:59:48,919 INFO L109 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-07-20 11:59:48,930 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:59:48,937 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:59:48,952 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:59:48,995 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:59:48,996 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:59:48,996 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:59:48,996 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:59:48,997 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:59:48,997 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:59:48,997 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:59:48,997 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:59:49,021 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 11:59:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:59:49,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:59:49,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:59:49,032 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:59:49,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:59:49,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1671060194, now seen corresponding path program 1 times [2020-07-20 11:59:49,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:59:49,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015182199] [2020-07-20 11:59:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:59:49,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:59:49,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:59:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:59:49,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:59:49,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015182199] [2020-07-20 11:59:49,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:59:49,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:59:49,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624034469] [2020-07-20 11:59:49,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:59:49,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:59:49,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:59:49,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:59:49,211 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2020-07-20 11:59:49,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:59:49,282 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2020-07-20 11:59:49,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:59:49,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-07-20 11:59:49,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:59:49,294 INFO L225 Difference]: With dead ends: 53 [2020-07-20 11:59:49,295 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 11:59:49,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:59:49,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 11:59:49,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-07-20 11:59:49,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 11:59:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-07-20 11:59:49,350 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-07-20 11:59:49,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:59:49,351 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-07-20 11:59:49,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:59:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-07-20 11:59:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:59:49,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:59:49,353 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:59:49,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:49,568 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:59:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:59:49,569 INFO L82 PathProgramCache]: Analyzing trace with hash 514965223, now seen corresponding path program 1 times [2020-07-20 11:59:49,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:59:49,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816199546] [2020-07-20 11:59:49,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:59:49,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:59:49,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:59:49,689 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:59:49,696 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:59:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:59:49,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:59:49,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816199546] [2020-07-20 11:59:49,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:59:49,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 11:59:49,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187649320] [2020-07-20 11:59:49,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 11:59:49,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:59:49,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 11:59:49,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:59:49,747 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2020-07-20 11:59:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:59:49,860 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-07-20 11:59:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:59:49,861 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-07-20 11:59:49,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:59:49,862 INFO L225 Difference]: With dead ends: 39 [2020-07-20 11:59:49,862 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 11:59:49,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:59:49,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 11:59:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-07-20 11:59:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 11:59:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 11:59:49,874 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 21 [2020-07-20 11:59:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:59:49,874 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 11:59:49,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 11:59:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 11:59:49,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 11:59:49,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:59:49,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:59:50,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:50,090 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:59:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:59:50,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1134636734, now seen corresponding path program 1 times [2020-07-20 11:59:50,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:59:50,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669038235] [2020-07-20 11:59:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:59:50,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:59:50,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:59:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:59:50,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:59:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:59:50,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669038235] [2020-07-20 11:59:50,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:59:50,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 11:59:50,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664521301] [2020-07-20 11:59:50,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:59:50,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:59:50,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:59:50,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:59:50,340 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2020-07-20 11:59:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:59:50,586 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-07-20 11:59:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:59:50,587 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-20 11:59:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:59:50,590 INFO L225 Difference]: With dead ends: 65 [2020-07-20 11:59:50,591 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 11:59:50,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:59:50,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 11:59:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-07-20 11:59:50,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 11:59:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-07-20 11:59:50,605 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2020-07-20 11:59:50,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:59:50,607 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-07-20 11:59:50,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:59:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-07-20 11:59:50,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 11:59:50,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:59:50,610 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:59:50,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:50,825 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:59:50,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:59:50,826 INFO L82 PathProgramCache]: Analyzing trace with hash 848296232, now seen corresponding path program 1 times [2020-07-20 11:59:50,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:59:50,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442801936] [2020-07-20 11:59:50,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:59:50,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:59:50,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:59:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 11:59:50,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:59:50,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442801936] [2020-07-20 11:59:50,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:59:50,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 11:59:50,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797215576] [2020-07-20 11:59:50,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:59:50,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:59:50,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:59:50,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:59:50,934 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 6 states. [2020-07-20 11:59:51,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:59:51,021 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2020-07-20 11:59:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:59:51,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-07-20 11:59:51,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:59:51,023 INFO L225 Difference]: With dead ends: 68 [2020-07-20 11:59:51,023 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 11:59:51,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:59:51,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 11:59:51,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-07-20 11:59:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 11:59:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-07-20 11:59:51,042 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 34 [2020-07-20 11:59:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:59:51,043 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-07-20 11:59:51,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:59:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-07-20 11:59:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 11:59:51,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:59:51,048 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:59:51,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:51,264 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:59:51,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:59:51,264 INFO L82 PathProgramCache]: Analyzing trace with hash -670641491, now seen corresponding path program 2 times [2020-07-20 11:59:51,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:59:51,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478953503] [2020-07-20 11:59:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:59:51,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 11:59:51,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:59:51,377 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:59:51,380 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:59:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 11:59:51,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:59:51,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:59:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 11:59:51,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478953503] [2020-07-20 11:59:51,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:59:51,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-20 11:59:51,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055780814] [2020-07-20 11:59:51,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:59:51,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:59:51,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:59:51,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:59:51,495 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 15 states. [2020-07-20 11:59:51,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:59:51,850 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-07-20 11:59:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 11:59:51,851 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-07-20 11:59:51,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:59:51,853 INFO L225 Difference]: With dead ends: 78 [2020-07-20 11:59:51,853 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 11:59:51,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:59:51,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 11:59:51,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2020-07-20 11:59:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 11:59:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-07-20 11:59:51,866 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 41 [2020-07-20 11:59:51,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:59:51,866 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-07-20 11:59:51,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:59:51,866 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-07-20 11:59:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 11:59:51,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:59:51,868 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:59:52,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:52,082 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:59:52,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:59:52,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1941695900, now seen corresponding path program 3 times [2020-07-20 11:59:52,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:59:52,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304745684] [2020-07-20 11:59:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:59:52,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:59:52,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:59:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 60 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-20 11:59:52,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:59:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 40 proven. 19 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-07-20 11:59:52,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304745684] [2020-07-20 11:59:52,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:59:52,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-07-20 11:59:52,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436569220] [2020-07-20 11:59:52,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:59:52,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:59:52,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:59:52,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:59:52,328 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 13 states. [2020-07-20 11:59:52,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:59:52,763 INFO L93 Difference]: Finished difference Result 127 states and 164 transitions. [2020-07-20 11:59:52,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 11:59:52,766 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-07-20 11:59:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:59:52,768 INFO L225 Difference]: With dead ends: 127 [2020-07-20 11:59:52,768 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 11:59:52,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:59:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 11:59:52,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 64. [2020-07-20 11:59:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 11:59:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-07-20 11:59:52,789 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 62 [2020-07-20 11:59:52,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:59:52,789 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-07-20 11:59:52,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:59:52,790 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-07-20 11:59:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-20 11:59:52,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:59:52,791 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:59:52,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:52,995 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:59:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:59:52,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1583260034, now seen corresponding path program 4 times [2020-07-20 11:59:52,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:59:52,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065591578] [2020-07-20 11:59:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:59:53,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:59:53,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:59:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 88 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-07-20 11:59:53,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:59:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-20 11:59:53,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065591578] [2020-07-20 11:59:53,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:59:53,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-20 11:59:53,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505904389] [2020-07-20 11:59:53,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:59:53,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:59:53,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:59:53,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:59:53,182 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 11 states. [2020-07-20 11:59:53,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:59:53,404 INFO L93 Difference]: Finished difference Result 123 states and 153 transitions. [2020-07-20 11:59:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:59:53,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-07-20 11:59:53,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:59:53,406 INFO L225 Difference]: With dead ends: 123 [2020-07-20 11:59:53,410 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 11:59:53,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:59:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 11:59:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-20 11:59:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 11:59:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-07-20 11:59:53,430 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 72 [2020-07-20 11:59:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:59:53,431 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-07-20 11:59:53,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:59:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-07-20 11:59:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 11:59:53,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:59:53,437 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:59:53,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:53,645 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:59:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:59:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1833574291, now seen corresponding path program 5 times [2020-07-20 11:59:53,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:59:53,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657339453] [2020-07-20 11:59:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:59:53,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:59:53,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:59:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 75 proven. 62 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-07-20 11:59:53,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:59:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 53 proven. 62 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-07-20 11:59:53,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657339453] [2020-07-20 11:59:53,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:59:53,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-20 11:59:53,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951626045] [2020-07-20 11:59:53,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:59:53,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:59:53,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:59:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:59:53,990 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 17 states. [2020-07-20 11:59:54,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:59:54,649 INFO L93 Difference]: Finished difference Result 132 states and 162 transitions. [2020-07-20 11:59:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 11:59:54,652 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-20 11:59:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:59:54,654 INFO L225 Difference]: With dead ends: 132 [2020-07-20 11:59:54,654 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 11:59:54,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 11:59:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 11:59:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2020-07-20 11:59:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 11:59:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-07-20 11:59:54,669 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 79 [2020-07-20 11:59:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:59:54,670 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-07-20 11:59:54,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:59:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-07-20 11:59:54,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-07-20 11:59:54,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:59:54,672 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:59:54,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:54,885 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:59:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:59:54,886 INFO L82 PathProgramCache]: Analyzing trace with hash -832577267, now seen corresponding path program 6 times [2020-07-20 11:59:54,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:59:54,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574723340] [2020-07-20 11:59:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:59:54,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 11:59:54,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:59:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 216 proven. 32 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-07-20 11:59:55,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:59:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 127 proven. 49 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-07-20 11:59:55,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574723340] [2020-07-20 11:59:55,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:59:55,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-20 11:59:55,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279132840] [2020-07-20 11:59:55,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:59:55,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:59:55,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:59:55,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:59:55,176 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 15 states. [2020-07-20 11:59:55,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:59:55,548 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2020-07-20 11:59:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 11:59:55,548 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 99 [2020-07-20 11:59:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:59:55,551 INFO L225 Difference]: With dead ends: 140 [2020-07-20 11:59:55,551 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 11:59:55,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:59:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 11:59:55,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-07-20 11:59:55,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-20 11:59:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2020-07-20 11:59:55,586 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 99 [2020-07-20 11:59:55,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:59:55,587 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2020-07-20 11:59:55,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:59:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2020-07-20 11:59:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-20 11:59:55,597 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:59:55,598 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:59:55,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:55,813 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:59:55,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:59:55,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1419871984, now seen corresponding path program 7 times [2020-07-20 11:59:55,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:59:55,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375761397] [2020-07-20 11:59:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:59:55,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:59:55,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:59:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 106 proven. 124 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-07-20 11:59:55,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:59:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 72 proven. 124 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2020-07-20 11:59:56,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375761397] [2020-07-20 11:59:56,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:59:56,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-07-20 11:59:56,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371011164] [2020-07-20 11:59:56,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 11:59:56,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:59:56,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 11:59:56,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:59:56,121 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand 16 states. [2020-07-20 11:59:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:59:56,976 INFO L93 Difference]: Finished difference Result 169 states and 212 transitions. [2020-07-20 11:59:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 11:59:56,976 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 106 [2020-07-20 11:59:56,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:59:56,978 INFO L225 Difference]: With dead ends: 169 [2020-07-20 11:59:56,978 INFO L226 Difference]: Without dead ends: 122 [2020-07-20 11:59:56,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 193 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 11:59:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-20 11:59:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-07-20 11:59:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-20 11:59:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2020-07-20 11:59:56,998 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 106 [2020-07-20 11:59:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:59:56,999 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2020-07-20 11:59:56,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 11:59:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2020-07-20 11:59:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-20 11:59:57,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:59:57,001 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:59:57,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:57,216 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:59:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:59:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1976134303, now seen corresponding path program 8 times [2020-07-20 11:59:57,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:59:57,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615776226] [2020-07-20 11:59:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:59:57,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 11:59:57,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:59:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 338 proven. 56 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-20 11:59:57,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:59:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 212 proven. 62 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-07-20 11:59:57,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615776226] [2020-07-20 11:59:57,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:59:57,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2020-07-20 11:59:57,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394706882] [2020-07-20 11:59:57,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:59:57,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:59:57,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:59:57,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:59:57,526 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand 14 states. [2020-07-20 11:59:57,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:59:57,826 INFO L93 Difference]: Finished difference Result 186 states and 230 transitions. [2020-07-20 11:59:57,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 11:59:57,828 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 123 [2020-07-20 11:59:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:59:57,829 INFO L225 Difference]: With dead ends: 186 [2020-07-20 11:59:57,829 INFO L226 Difference]: Without dead ends: 99 [2020-07-20 11:59:57,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 229 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:59:57,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-20 11:59:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2020-07-20 11:59:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 11:59:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2020-07-20 11:59:57,844 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 123 [2020-07-20 11:59:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:59:57,845 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2020-07-20 11:59:57,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:59:57,845 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2020-07-20 11:59:57,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-20 11:59:57,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:59:57,847 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:59:58,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:58,062 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:59:58,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:59:58,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1688384554, now seen corresponding path program 9 times [2020-07-20 11:59:58,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:59:58,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338164284] [2020-07-20 11:59:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:59:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:59:58,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:59:58,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:59:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 61 proven. 271 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-07-20 11:59:58,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:59:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 61 proven. 271 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-07-20 11:59:58,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338164284] [2020-07-20 11:59:58,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:59:58,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2020-07-20 11:59:58,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219558247] [2020-07-20 11:59:58,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 11:59:58,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:59:58,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 11:59:58,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:59:58,446 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 20 states. [2020-07-20 11:59:59,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:59:59,762 INFO L93 Difference]: Finished difference Result 177 states and 219 transitions. [2020-07-20 11:59:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-20 11:59:59,765 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 130 [2020-07-20 11:59:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:59:59,767 INFO L225 Difference]: With dead ends: 177 [2020-07-20 11:59:59,767 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 11:59:59,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 237 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=634, Invalid=1916, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 11:59:59,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 11:59:59,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-07-20 11:59:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 11:59:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2020-07-20 11:59:59,784 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 130 [2020-07-20 11:59:59,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:59:59,784 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2020-07-20 11:59:59,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 11:59:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2020-07-20 11:59:59,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-07-20 11:59:59,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:59:59,787 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 6, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:00,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:00,002 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:00,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:00,003 INFO L82 PathProgramCache]: Analyzing trace with hash -840848228, now seen corresponding path program 10 times [2020-07-20 12:00:00,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:00,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791166100] [2020-07-20 12:00:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:00,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 12:00:00,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 555 proven. 118 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-07-20 12:00:00,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 284 proven. 205 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2020-07-20 12:00:00,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791166100] [2020-07-20 12:00:00,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:00,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2020-07-20 12:00:00,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416420630] [2020-07-20 12:00:00,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 12:00:00,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:00,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 12:00:00,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-07-20 12:00:00,381 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand 18 states. [2020-07-20 12:00:00,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:00,890 INFO L93 Difference]: Finished difference Result 155 states and 189 transitions. [2020-07-20 12:00:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 12:00:00,891 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 154 [2020-07-20 12:00:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:00,892 INFO L225 Difference]: With dead ends: 155 [2020-07-20 12:00:00,893 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 12:00:00,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 287 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=614, Unknown=0, NotChecked=0, Total=870 [2020-07-20 12:00:00,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 12:00:00,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2020-07-20 12:00:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-20 12:00:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2020-07-20 12:00:00,920 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 154 [2020-07-20 12:00:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:00,922 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2020-07-20 12:00:00,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 12:00:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2020-07-20 12:00:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-20 12:00:00,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:00,925 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 6, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:01,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:01,140 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:01,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1311982393, now seen corresponding path program 11 times [2020-07-20 12:00:01,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:01,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652321004] [2020-07-20 12:00:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:01,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 12:00:01,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:01,329 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:00:01,330 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:00:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 476 proven. 26 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2020-07-20 12:00:01,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:01,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:00:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 80 proven. 422 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2020-07-20 12:00:01,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652321004] [2020-07-20 12:00:01,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:01,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2020-07-20 12:00:01,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535248224] [2020-07-20 12:00:01,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 12:00:01,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:01,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 12:00:01,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-07-20 12:00:01,590 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 22 states. [2020-07-20 12:00:02,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:02,269 INFO L93 Difference]: Finished difference Result 166 states and 209 transitions. [2020-07-20 12:00:02,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 12:00:02,270 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 161 [2020-07-20 12:00:02,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:02,273 INFO L225 Difference]: With dead ends: 166 [2020-07-20 12:00:02,273 INFO L226 Difference]: Without dead ends: 164 [2020-07-20 12:00:02,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 297 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=526, Invalid=1034, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 12:00:02,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-20 12:00:02,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 136. [2020-07-20 12:00:02,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 12:00:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 169 transitions. [2020-07-20 12:00:02,296 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 169 transitions. Word has length 161 [2020-07-20 12:00:02,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:02,296 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 169 transitions. [2020-07-20 12:00:02,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 12:00:02,297 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 169 transitions. [2020-07-20 12:00:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-07-20 12:00:02,299 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:02,299 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 6, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:02,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:02,510 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:02,511 INFO L82 PathProgramCache]: Analyzing trace with hash -90659728, now seen corresponding path program 12 times [2020-07-20 12:00:02,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:02,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781046943] [2020-07-20 12:00:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:02,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 12:00:02,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1885 backedges. 617 proven. 521 refuted. 0 times theorem prover too weak. 747 trivial. 0 not checked. [2020-07-20 12:00:02,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1885 backedges. 337 proven. 521 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-07-20 12:00:03,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781046943] [2020-07-20 12:00:03,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:03,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2020-07-20 12:00:03,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63512322] [2020-07-20 12:00:03,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 12:00:03,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:03,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 12:00:03,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2020-07-20 12:00:03,055 INFO L87 Difference]: Start difference. First operand 136 states and 169 transitions. Second operand 24 states. [2020-07-20 12:00:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:04,675 INFO L93 Difference]: Finished difference Result 267 states and 343 transitions. [2020-07-20 12:00:04,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-20 12:00:04,676 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 196 [2020-07-20 12:00:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:04,678 INFO L225 Difference]: With dead ends: 267 [2020-07-20 12:00:04,678 INFO L226 Difference]: Without dead ends: 188 [2020-07-20 12:00:04,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 365 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=931, Invalid=2609, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 12:00:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-20 12:00:04,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 156. [2020-07-20 12:00:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-20 12:00:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 197 transitions. [2020-07-20 12:00:04,703 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 197 transitions. Word has length 196 [2020-07-20 12:00:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:04,703 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 197 transitions. [2020-07-20 12:00:04,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 12:00:04,704 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 197 transitions. [2020-07-20 12:00:04,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-07-20 12:00:04,708 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:04,708 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 7, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:04,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:04,923 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:04,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:04,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1782452330, now seen corresponding path program 13 times [2020-07-20 12:00:04,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:04,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663141610] [2020-07-20 12:00:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:05,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 12:00:05,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 1512 proven. 216 refuted. 0 times theorem prover too weak. 914 trivial. 0 not checked. [2020-07-20 12:00:05,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 729 proven. 405 refuted. 0 times theorem prover too weak. 1508 trivial. 0 not checked. [2020-07-20 12:00:05,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663141610] [2020-07-20 12:00:05,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:05,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2020-07-20 12:00:05,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403555392] [2020-07-20 12:00:05,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 12:00:05,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:05,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 12:00:05,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-07-20 12:00:05,508 INFO L87 Difference]: Start difference. First operand 156 states and 197 transitions. Second operand 22 states. [2020-07-20 12:00:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:06,267 INFO L93 Difference]: Finished difference Result 289 states and 385 transitions. [2020-07-20 12:00:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 12:00:06,268 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 230 [2020-07-20 12:00:06,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:06,270 INFO L225 Difference]: With dead ends: 289 [2020-07-20 12:00:06,270 INFO L226 Difference]: Without dead ends: 209 [2020-07-20 12:00:06,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 435 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=453, Invalid=1107, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 12:00:06,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-07-20 12:00:06,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 190. [2020-07-20 12:00:06,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-20 12:00:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 248 transitions. [2020-07-20 12:00:06,298 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 248 transitions. Word has length 230 [2020-07-20 12:00:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:06,299 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 248 transitions. [2020-07-20 12:00:06,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 12:00:06,299 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 248 transitions. [2020-07-20 12:00:06,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-07-20 12:00:06,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:06,303 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 7, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:06,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:06,517 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:06,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:06,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1051553665, now seen corresponding path program 14 times [2020-07-20 12:00:06,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:06,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269392191] [2020-07-20 12:00:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:06,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 12:00:06,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2834 backedges. 893 proven. 639 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2020-07-20 12:00:06,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2834 backedges. 463 proven. 639 refuted. 0 times theorem prover too weak. 1732 trivial. 0 not checked. [2020-07-20 12:00:06,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269392191] [2020-07-20 12:00:06,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:06,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-07-20 12:00:06,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961768867] [2020-07-20 12:00:06,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 12:00:06,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:06,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 12:00:06,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-07-20 12:00:06,991 INFO L87 Difference]: Start difference. First operand 190 states and 248 transitions. Second operand 19 states. [2020-07-20 12:00:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:08,242 INFO L93 Difference]: Finished difference Result 456 states and 609 transitions. [2020-07-20 12:00:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-20 12:00:08,243 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 237 [2020-07-20 12:00:08,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:08,246 INFO L225 Difference]: With dead ends: 456 [2020-07-20 12:00:08,246 INFO L226 Difference]: Without dead ends: 353 [2020-07-20 12:00:08,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 451 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=720, Invalid=2360, Unknown=0, NotChecked=0, Total=3080 [2020-07-20 12:00:08,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-07-20 12:00:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 254. [2020-07-20 12:00:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-07-20 12:00:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 331 transitions. [2020-07-20 12:00:08,305 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 331 transitions. Word has length 237 [2020-07-20 12:00:08,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:08,307 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 331 transitions. [2020-07-20 12:00:08,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 12:00:08,308 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 331 transitions. [2020-07-20 12:00:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-07-20 12:00:08,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:08,310 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 30, 8, 7, 7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:08,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:08,524 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:08,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:08,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1090659833, now seen corresponding path program 15 times [2020-07-20 12:00:08,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:08,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111106830] [2020-07-20 12:00:08,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:08,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 12:00:08,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3506 backedges. 1869 proven. 216 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2020-07-20 12:00:08,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3506 backedges. 1121 proven. 226 refuted. 0 times theorem prover too weak. 2159 trivial. 0 not checked. [2020-07-20 12:00:08,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111106830] [2020-07-20 12:00:08,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:08,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2020-07-20 12:00:08,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080300203] [2020-07-20 12:00:08,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 12:00:08,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:08,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 12:00:08,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-07-20 12:00:08,975 INFO L87 Difference]: Start difference. First operand 254 states and 331 transitions. Second operand 17 states. [2020-07-20 12:00:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:09,426 INFO L93 Difference]: Finished difference Result 363 states and 479 transitions. [2020-07-20 12:00:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 12:00:09,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 261 [2020-07-20 12:00:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:09,428 INFO L225 Difference]: With dead ends: 363 [2020-07-20 12:00:09,428 INFO L226 Difference]: Without dead ends: 206 [2020-07-20 12:00:09,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 501 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-07-20 12:00:09,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-20 12:00:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-07-20 12:00:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-20 12:00:09,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 266 transitions. [2020-07-20 12:00:09,460 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 266 transitions. Word has length 261 [2020-07-20 12:00:09,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:09,461 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 266 transitions. [2020-07-20 12:00:09,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 12:00:09,461 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 266 transitions. [2020-07-20 12:00:09,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-07-20 12:00:09,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:09,464 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 31, 8, 7, 7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:09,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:09,674 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:09,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:09,675 INFO L82 PathProgramCache]: Analyzing trace with hash -431748828, now seen corresponding path program 16 times [2020-07-20 12:00:09,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:09,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408351396] [2020-07-20 12:00:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:09,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 12:00:09,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 904 proven. 1050 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2020-07-20 12:00:09,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 480 proven. 1050 refuted. 0 times theorem prover too weak. 2197 trivial. 0 not checked. [2020-07-20 12:00:10,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408351396] [2020-07-20 12:00:10,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:10,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2020-07-20 12:00:10,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711998553] [2020-07-20 12:00:10,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 12:00:10,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:10,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 12:00:10,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-07-20 12:00:10,312 INFO L87 Difference]: Start difference. First operand 206 states and 266 transitions. Second operand 23 states. [2020-07-20 12:00:12,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:12,642 INFO L93 Difference]: Finished difference Result 373 states and 497 transitions. [2020-07-20 12:00:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-07-20 12:00:12,643 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 268 [2020-07-20 12:00:12,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:12,646 INFO L225 Difference]: With dead ends: 373 [2020-07-20 12:00:12,646 INFO L226 Difference]: Without dead ends: 260 [2020-07-20 12:00:12,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 509 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1346, Invalid=4354, Unknown=0, NotChecked=0, Total=5700 [2020-07-20 12:00:12,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-20 12:00:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 224. [2020-07-20 12:00:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-07-20 12:00:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 290 transitions. [2020-07-20 12:00:12,689 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 290 transitions. Word has length 268 [2020-07-20 12:00:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:12,690 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 290 transitions. [2020-07-20 12:00:12,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 12:00:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 290 transitions. [2020-07-20 12:00:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-20 12:00:12,693 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:12,693 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 35, 9, 8, 8, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:12,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:12,908 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:12,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:12,909 INFO L82 PathProgramCache]: Analyzing trace with hash -935543841, now seen corresponding path program 17 times [2020-07-20 12:00:12,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:12,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487268538] [2020-07-20 12:00:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:13,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 12:00:13,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4743 backedges. 2497 proven. 343 refuted. 0 times theorem prover too weak. 1903 trivial. 0 not checked. [2020-07-20 12:00:13,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4743 backedges. 1289 proven. 633 refuted. 0 times theorem prover too weak. 2821 trivial. 0 not checked. [2020-07-20 12:00:13,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487268538] [2020-07-20 12:00:13,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:13,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2020-07-20 12:00:13,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556913812] [2020-07-20 12:00:13,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 12:00:13,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:13,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 12:00:13,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-07-20 12:00:13,514 INFO L87 Difference]: Start difference. First operand 224 states and 290 transitions. Second operand 21 states. [2020-07-20 12:00:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:14,176 INFO L93 Difference]: Finished difference Result 320 states and 421 transitions. [2020-07-20 12:00:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 12:00:14,176 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 299 [2020-07-20 12:00:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:14,181 INFO L225 Difference]: With dead ends: 320 [2020-07-20 12:00:14,182 INFO L226 Difference]: Without dead ends: 224 [2020-07-20 12:00:14,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 573 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 12:00:14,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-07-20 12:00:14,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 193. [2020-07-20 12:00:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-07-20 12:00:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 241 transitions. [2020-07-20 12:00:14,212 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 241 transitions. Word has length 299 [2020-07-20 12:00:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:14,213 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 241 transitions. [2020-07-20 12:00:14,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 12:00:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 241 transitions. [2020-07-20 12:00:14,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-07-20 12:00:14,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:14,215 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 36, 9, 8, 8, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:14,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:14,416 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash 221652094, now seen corresponding path program 18 times [2020-07-20 12:00:14,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:14,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343505454] [2020-07-20 12:00:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:14,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 12:00:14,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 870 proven. 1638 refuted. 0 times theorem prover too weak. 2492 trivial. 0 not checked. [2020-07-20 12:00:14,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 480 proven. 1638 refuted. 0 times theorem prover too weak. 2882 trivial. 0 not checked. [2020-07-20 12:00:15,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343505454] [2020-07-20 12:00:15,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:15,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2020-07-20 12:00:15,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530552429] [2020-07-20 12:00:15,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 12:00:15,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:15,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 12:00:15,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2020-07-20 12:00:15,497 INFO L87 Difference]: Start difference. First operand 193 states and 241 transitions. Second operand 27 states. [2020-07-20 12:00:18,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:18,339 INFO L93 Difference]: Finished difference Result 335 states and 432 transitions. [2020-07-20 12:00:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-07-20 12:00:18,340 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 306 [2020-07-20 12:00:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:18,342 INFO L225 Difference]: With dead ends: 335 [2020-07-20 12:00:18,342 INFO L226 Difference]: Without dead ends: 250 [2020-07-20 12:00:18,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 581 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1692, Invalid=5448, Unknown=0, NotChecked=0, Total=7140 [2020-07-20 12:00:18,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-20 12:00:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 214. [2020-07-20 12:00:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-20 12:00:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 269 transitions. [2020-07-20 12:00:18,376 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 269 transitions. Word has length 306 [2020-07-20 12:00:18,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:18,377 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 269 transitions. [2020-07-20 12:00:18,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 12:00:18,377 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 269 transitions. [2020-07-20 12:00:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-20 12:00:18,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:18,379 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 41, 10, 9, 9, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:18,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:18,596 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:18,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash 856878168, now seen corresponding path program 19 times [2020-07-20 12:00:18,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:18,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436534068] [2020-07-20 12:00:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:18,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 12:00:18,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6461 backedges. 3324 proven. 515 refuted. 0 times theorem prover too weak. 2622 trivial. 0 not checked. [2020-07-20 12:00:18,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6461 backedges. 1560 proven. 1145 refuted. 0 times theorem prover too weak. 3756 trivial. 0 not checked. [2020-07-20 12:00:19,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436534068] [2020-07-20 12:00:19,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:19,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2020-07-20 12:00:19,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031555906] [2020-07-20 12:00:19,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 12:00:19,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:19,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 12:00:19,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2020-07-20 12:00:19,370 INFO L87 Difference]: Start difference. First operand 214 states and 269 transitions. Second operand 25 states. [2020-07-20 12:00:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:20,458 INFO L93 Difference]: Finished difference Result 327 states and 427 transitions. [2020-07-20 12:00:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 12:00:20,459 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 344 [2020-07-20 12:00:20,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:20,462 INFO L225 Difference]: With dead ends: 327 [2020-07-20 12:00:20,463 INFO L226 Difference]: Without dead ends: 262 [2020-07-20 12:00:20,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 659 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=638, Invalid=1618, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 12:00:20,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-07-20 12:00:20,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2020-07-20 12:00:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-07-20 12:00:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 319 transitions. [2020-07-20 12:00:20,526 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 319 transitions. Word has length 344 [2020-07-20 12:00:20,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:20,527 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 319 transitions. [2020-07-20 12:00:20,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 12:00:20,527 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 319 transitions. [2020-07-20 12:00:20,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 12:00:20,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:20,533 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 42, 10, 9, 9, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:20,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:20,746 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:20,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:20,746 INFO L82 PathProgramCache]: Analyzing trace with hash 930621925, now seen corresponding path program 20 times [2020-07-20 12:00:20,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:20,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420780421] [2020-07-20 12:00:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:20,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 12:00:20,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6761 backedges. 770 proven. 2457 refuted. 0 times theorem prover too weak. 3534 trivial. 0 not checked. [2020-07-20 12:00:21,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6761 backedges. 454 proven. 2457 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2020-07-20 12:00:21,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420780421] [2020-07-20 12:00:21,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:21,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2020-07-20 12:00:21,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303009947] [2020-07-20 12:00:21,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 12:00:21,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:21,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 12:00:21,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2020-07-20 12:00:21,776 INFO L87 Difference]: Start difference. First operand 248 states and 319 transitions. Second operand 31 states. [2020-07-20 12:00:25,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:25,548 INFO L93 Difference]: Finished difference Result 462 states and 609 transitions. [2020-07-20 12:00:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-07-20 12:00:25,553 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 351 [2020-07-20 12:00:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:25,556 INFO L225 Difference]: With dead ends: 462 [2020-07-20 12:00:25,556 INFO L226 Difference]: Without dead ends: 333 [2020-07-20 12:00:25,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 667 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3218 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2462, Invalid=7438, Unknown=0, NotChecked=0, Total=9900 [2020-07-20 12:00:25,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-07-20 12:00:25,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 274. [2020-07-20 12:00:25,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-07-20 12:00:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 355 transitions. [2020-07-20 12:00:25,608 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 355 transitions. Word has length 351 [2020-07-20 12:00:25,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:25,609 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 355 transitions. [2020-07-20 12:00:25,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 12:00:25,609 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 355 transitions. [2020-07-20 12:00:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2020-07-20 12:00:25,612 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:25,613 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 48, 48, 11, 10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:25,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:25,828 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:25,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1703194347, now seen corresponding path program 21 times [2020-07-20 12:00:25,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:25,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615721517] [2020-07-20 12:00:25,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:25,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 12:00:25,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8813 backedges. 4418 proven. 741 refuted. 0 times theorem prover too weak. 3654 trivial. 0 not checked. [2020-07-20 12:00:26,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8813 backedges. 2002 proven. 1771 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2020-07-20 12:00:26,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615721517] [2020-07-20 12:00:26,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:26,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2020-07-20 12:00:26,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930013954] [2020-07-20 12:00:26,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 12:00:26,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:26,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 12:00:26,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2020-07-20 12:00:26,906 INFO L87 Difference]: Start difference. First operand 274 states and 355 transitions. Second operand 29 states. [2020-07-20 12:00:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:28,317 INFO L93 Difference]: Finished difference Result 444 states and 593 transitions. [2020-07-20 12:00:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 12:00:28,318 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 399 [2020-07-20 12:00:28,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:28,320 INFO L225 Difference]: With dead ends: 444 [2020-07-20 12:00:28,320 INFO L226 Difference]: Without dead ends: 321 [2020-07-20 12:00:28,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 765 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=969, Invalid=2453, Unknown=0, NotChecked=0, Total=3422 [2020-07-20 12:00:28,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-07-20 12:00:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 308. [2020-07-20 12:00:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-07-20 12:00:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 404 transitions. [2020-07-20 12:00:28,366 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 404 transitions. Word has length 399 [2020-07-20 12:00:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:28,366 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 404 transitions. [2020-07-20 12:00:28,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 12:00:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 404 transitions. [2020-07-20 12:00:28,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-20 12:00:28,369 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:28,369 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 49, 49, 49, 49, 11, 10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:28,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:28,577 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:28,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:28,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1852909686, now seen corresponding path program 22 times [2020-07-20 12:00:28,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:28,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535008846] [2020-07-20 12:00:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:28,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 12:00:28,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9163 backedges. 1474 proven. 2579 refuted. 0 times theorem prover too weak. 5110 trivial. 0 not checked. [2020-07-20 12:00:28,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9163 backedges. 762 proven. 2579 refuted. 0 times theorem prover too weak. 5822 trivial. 0 not checked. [2020-07-20 12:00:29,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535008846] [2020-07-20 12:00:29,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:29,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2020-07-20 12:00:29,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937709005] [2020-07-20 12:00:29,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 12:00:29,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:29,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 12:00:29,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-07-20 12:00:29,359 INFO L87 Difference]: Start difference. First operand 308 states and 404 transitions. Second operand 22 states. [2020-07-20 12:00:31,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:31,369 INFO L93 Difference]: Finished difference Result 717 states and 960 transitions. [2020-07-20 12:00:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-20 12:00:31,370 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 406 [2020-07-20 12:00:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:31,374 INFO L225 Difference]: With dead ends: 717 [2020-07-20 12:00:31,374 INFO L226 Difference]: Without dead ends: 577 [2020-07-20 12:00:31,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 785 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1240, Invalid=4310, Unknown=0, NotChecked=0, Total=5550 [2020-07-20 12:00:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2020-07-20 12:00:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 408. [2020-07-20 12:00:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-07-20 12:00:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 534 transitions. [2020-07-20 12:00:31,455 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 534 transitions. Word has length 406 [2020-07-20 12:00:31,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:31,456 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 534 transitions. [2020-07-20 12:00:31,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 12:00:31,456 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 534 transitions. [2020-07-20 12:00:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-07-20 12:00:31,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:31,460 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 53, 53, 53, 53, 12, 11, 11, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:31,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:31,674 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:31,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:31,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1246863545, now seen corresponding path program 23 times [2020-07-20 12:00:31,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:31,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355651888] [2020-07-20 12:00:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:31,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 12:00:31,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10723 backedges. 4963 proven. 592 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2020-07-20 12:00:32,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10723 backedges. 3382 proven. 607 refuted. 0 times theorem prover too weak. 6734 trivial. 0 not checked. [2020-07-20 12:00:32,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355651888] [2020-07-20 12:00:32,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:32,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2020-07-20 12:00:32,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852760299] [2020-07-20 12:00:32,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 12:00:32,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:32,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 12:00:32,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-07-20 12:00:32,606 INFO L87 Difference]: Start difference. First operand 408 states and 534 transitions. Second operand 20 states. [2020-07-20 12:00:33,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:33,157 INFO L93 Difference]: Finished difference Result 557 states and 738 transitions. [2020-07-20 12:00:33,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 12:00:33,158 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 437 [2020-07-20 12:00:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:33,160 INFO L225 Difference]: With dead ends: 557 [2020-07-20 12:00:33,160 INFO L226 Difference]: Without dead ends: 327 [2020-07-20 12:00:33,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 849 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2020-07-20 12:00:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-07-20 12:00:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2020-07-20 12:00:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-07-20 12:00:33,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 426 transitions. [2020-07-20 12:00:33,217 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 426 transitions. Word has length 437 [2020-07-20 12:00:33,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:33,218 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 426 transitions. [2020-07-20 12:00:33,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 12:00:33,218 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 426 transitions. [2020-07-20 12:00:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2020-07-20 12:00:33,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:33,222 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 54, 54, 54, 54, 12, 11, 11, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:33,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:33,437 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:33,437 INFO L82 PathProgramCache]: Analyzing trace with hash -833030556, now seen corresponding path program 24 times [2020-07-20 12:00:33,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:33,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611215760] [2020-07-20 12:00:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:33,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 12:00:33,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11109 backedges. 1311 proven. 3537 refuted. 0 times theorem prover too weak. 6261 trivial. 0 not checked. [2020-07-20 12:00:33,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11109 backedges. 705 proven. 3537 refuted. 0 times theorem prover too weak. 6867 trivial. 0 not checked. [2020-07-20 12:00:34,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611215760] [2020-07-20 12:00:34,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:34,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2020-07-20 12:00:34,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562807531] [2020-07-20 12:00:34,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 12:00:34,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:34,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 12:00:34,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2020-07-20 12:00:34,408 INFO L87 Difference]: Start difference. First operand 327 states and 426 transitions. Second operand 26 states. [2020-07-20 12:00:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:38,038 INFO L93 Difference]: Finished difference Result 554 states and 739 transitions. [2020-07-20 12:00:38,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-07-20 12:00:38,039 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 444 [2020-07-20 12:00:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:38,042 INFO L225 Difference]: With dead ends: 554 [2020-07-20 12:00:38,042 INFO L226 Difference]: Without dead ends: 404 [2020-07-20 12:00:38,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 857 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3949 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2420, Invalid=8500, Unknown=0, NotChecked=0, Total=10920 [2020-07-20 12:00:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-07-20 12:00:38,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 348. [2020-07-20 12:00:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-07-20 12:00:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 454 transitions. [2020-07-20 12:00:38,119 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 454 transitions. Word has length 444 [2020-07-20 12:00:38,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:38,120 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 454 transitions. [2020-07-20 12:00:38,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 12:00:38,120 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 454 transitions. [2020-07-20 12:00:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 12:00:38,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:38,124 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 59, 59, 59, 59, 13, 12, 12, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:38,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:38,339 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:38,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:38,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1802445246, now seen corresponding path program 25 times [2020-07-20 12:00:38,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:38,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128937725] [2020-07-20 12:00:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:38,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 12:00:38,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13243 backedges. 6103 proven. 821 refuted. 0 times theorem prover too weak. 6319 trivial. 0 not checked. [2020-07-20 12:00:38,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13243 backedges. 3581 proven. 1561 refuted. 0 times theorem prover too weak. 8101 trivial. 0 not checked. [2020-07-20 12:00:39,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128937725] [2020-07-20 12:00:39,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:39,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2020-07-20 12:00:39,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601254556] [2020-07-20 12:00:39,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 12:00:39,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:39,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 12:00:39,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2020-07-20 12:00:39,341 INFO L87 Difference]: Start difference. First operand 348 states and 454 transitions. Second operand 24 states. [2020-07-20 12:00:40,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:40,257 INFO L93 Difference]: Finished difference Result 481 states and 637 transitions. [2020-07-20 12:00:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 12:00:40,258 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 482 [2020-07-20 12:00:40,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:40,260 INFO L225 Difference]: With dead ends: 481 [2020-07-20 12:00:40,260 INFO L226 Difference]: Without dead ends: 348 [2020-07-20 12:00:40,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 935 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=533, Invalid=1359, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 12:00:40,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-07-20 12:00:40,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2020-07-20 12:00:40,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-07-20 12:00:40,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 452 transitions. [2020-07-20 12:00:40,323 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 452 transitions. Word has length 482 [2020-07-20 12:00:40,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:40,323 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 452 transitions. [2020-07-20 12:00:40,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 12:00:40,323 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 452 transitions. [2020-07-20 12:00:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 12:00:40,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:40,327 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 60, 60, 60, 60, 13, 12, 12, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:40,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:40,541 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:40,542 INFO L82 PathProgramCache]: Analyzing trace with hash 564016575, now seen corresponding path program 26 times [2020-07-20 12:00:40,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:40,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830904296] [2020-07-20 12:00:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:40,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 12:00:40,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13672 backedges. 1082 proven. 4783 refuted. 0 times theorem prover too weak. 7807 trivial. 0 not checked. [2020-07-20 12:00:41,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13672 backedges. 622 proven. 4783 refuted. 0 times theorem prover too weak. 8267 trivial. 0 not checked. [2020-07-20 12:00:41,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830904296] [2020-07-20 12:00:41,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:41,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2020-07-20 12:00:41,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885638190] [2020-07-20 12:00:41,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 12:00:41,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:41,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 12:00:41,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2020-07-20 12:00:41,759 INFO L87 Difference]: Start difference. First operand 348 states and 452 transitions. Second operand 30 states. [2020-07-20 12:00:46,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:46,631 INFO L93 Difference]: Finished difference Result 561 states and 744 transitions. [2020-07-20 12:00:46,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-07-20 12:00:46,632 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 489 [2020-07-20 12:00:46,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:46,634 INFO L225 Difference]: With dead ends: 561 [2020-07-20 12:00:46,635 INFO L226 Difference]: Without dead ends: 408 [2020-07-20 12:00:46,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 943 SyntacticMatches, 6 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5393 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3316, Invalid=11446, Unknown=0, NotChecked=0, Total=14762 [2020-07-20 12:00:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-07-20 12:00:46,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 372. [2020-07-20 12:00:46,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-07-20 12:00:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 484 transitions. [2020-07-20 12:00:46,701 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 484 transitions. Word has length 489 [2020-07-20 12:00:46,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:46,701 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 484 transitions. [2020-07-20 12:00:46,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 12:00:46,702 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 484 transitions. [2020-07-20 12:00:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-07-20 12:00:46,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:46,707 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 66, 66, 66, 66, 14, 13, 13, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:46,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:46,920 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:46,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash 869445188, now seen corresponding path program 27 times [2020-07-20 12:00:46,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:46,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990800046] [2020-07-20 12:00:46,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:47,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 12:00:47,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16502 backedges. 7544 proven. 1104 refuted. 0 times theorem prover too weak. 7854 trivial. 0 not checked. [2020-07-20 12:00:47,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16502 backedges. 3915 proven. 2699 refuted. 0 times theorem prover too weak. 9888 trivial. 0 not checked. [2020-07-20 12:00:48,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990800046] [2020-07-20 12:00:48,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:48,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2020-07-20 12:00:48,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772186039] [2020-07-20 12:00:48,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 12:00:48,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 12:00:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2020-07-20 12:00:48,393 INFO L87 Difference]: Start difference. First operand 372 states and 484 transitions. Second operand 28 states. [2020-07-20 12:00:49,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:49,842 INFO L93 Difference]: Finished difference Result 505 states and 666 transitions. [2020-07-20 12:00:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-20 12:00:49,848 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 534 [2020-07-20 12:00:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:49,851 INFO L225 Difference]: With dead ends: 505 [2020-07-20 12:00:49,851 INFO L226 Difference]: Without dead ends: 372 [2020-07-20 12:00:49,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1095 GetRequests, 1035 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=863, Invalid=2217, Unknown=0, NotChecked=0, Total=3080 [2020-07-20 12:00:49,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-07-20 12:00:49,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 341. [2020-07-20 12:00:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-07-20 12:00:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-07-20 12:00:49,911 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 534 [2020-07-20 12:00:49,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:49,912 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-07-20 12:00:49,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 12:00:49,913 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-07-20 12:00:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2020-07-20 12:00:49,918 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:49,918 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 67, 67, 67, 67, 14, 13, 13, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:50,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:50,132 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:50,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:50,132 INFO L82 PathProgramCache]: Analyzing trace with hash 943892089, now seen corresponding path program 28 times [2020-07-20 12:00:50,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:50,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737440486] [2020-07-20 12:00:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:50,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 12:00:50,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16981 backedges. 766 proven. 6380 refuted. 0 times theorem prover too weak. 9835 trivial. 0 not checked. [2020-07-20 12:00:50,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16981 backedges. 504 proven. 6380 refuted. 0 times theorem prover too weak. 10097 trivial. 0 not checked. [2020-07-20 12:00:51,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737440486] [2020-07-20 12:00:51,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:51,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 34 [2020-07-20 12:00:51,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336176750] [2020-07-20 12:00:51,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 12:00:51,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:51,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 12:00:51,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 12:00:51,611 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 34 states. [2020-07-20 12:00:57,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:00:57,833 INFO L93 Difference]: Finished difference Result 529 states and 691 transitions. [2020-07-20 12:00:57,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-07-20 12:00:57,834 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 541 [2020-07-20 12:00:57,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:00:57,836 INFO L225 Difference]: With dead ends: 529 [2020-07-20 12:00:57,836 INFO L226 Difference]: Without dead ends: 404 [2020-07-20 12:00:57,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1043 SyntacticMatches, 6 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6579 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3980, Invalid=14110, Unknown=0, NotChecked=0, Total=18090 [2020-07-20 12:00:57,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-07-20 12:00:57,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 368. [2020-07-20 12:00:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-07-20 12:00:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 473 transitions. [2020-07-20 12:00:57,908 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 473 transitions. Word has length 541 [2020-07-20 12:00:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:00:57,909 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 473 transitions. [2020-07-20 12:00:57,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 12:00:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 473 transitions. [2020-07-20 12:00:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2020-07-20 12:00:57,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:00:57,916 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 74, 74, 74, 74, 15, 14, 14, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:00:58,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:58,132 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:00:58,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:00:58,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1328811571, now seen corresponding path program 29 times [2020-07-20 12:00:58,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:00:58,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032652512] [2020-07-20 12:00:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:00:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:00:58,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 12:00:58,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:00:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20650 backedges. 9340 proven. 1450 refuted. 0 times theorem prover too weak. 9860 trivial. 0 not checked. [2020-07-20 12:00:58,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:00:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20650 backedges. 4438 proven. 4030 refuted. 0 times theorem prover too weak. 12182 trivial. 0 not checked. [2020-07-20 12:00:59,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032652512] [2020-07-20 12:00:59,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:00:59,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2020-07-20 12:00:59,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330893927] [2020-07-20 12:00:59,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 12:00:59,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:00:59,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 12:00:59,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2020-07-20 12:00:59,760 INFO L87 Difference]: Start difference. First operand 368 states and 473 transitions. Second operand 32 states. [2020-07-20 12:01:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:01:01,554 INFO L93 Difference]: Finished difference Result 512 states and 672 transitions. [2020-07-20 12:01:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-20 12:01:01,555 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 593 [2020-07-20 12:01:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:01:01,557 INFO L225 Difference]: With dead ends: 512 [2020-07-20 12:01:01,557 INFO L226 Difference]: Without dead ends: 410 [2020-07-20 12:01:01,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1221 GetRequests, 1149 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1270, Invalid=3286, Unknown=0, NotChecked=0, Total=4556 [2020-07-20 12:01:01,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-07-20 12:01:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 402. [2020-07-20 12:01:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-07-20 12:01:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 521 transitions. [2020-07-20 12:01:01,638 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 521 transitions. Word has length 593 [2020-07-20 12:01:01,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:01:01,638 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 521 transitions. [2020-07-20 12:01:01,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 12:01:01,638 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 521 transitions. [2020-07-20 12:01:01,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2020-07-20 12:01:01,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:01:01,644 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 76, 75, 75, 75, 75, 15, 14, 14, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:01:01,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:01,860 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:01:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:01:01,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1218530218, now seen corresponding path program 30 times [2020-07-20 12:01:01,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:01:01,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628628112] [2020-07-20 12:01:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:01:02,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 12:01:02,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:01:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21186 backedges. 342 proven. 8400 refuted. 0 times theorem prover too weak. 12444 trivial. 0 not checked. [2020-07-20 12:01:02,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:01:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21186 backedges. 342 proven. 8400 refuted. 0 times theorem prover too weak. 12444 trivial. 0 not checked. [2020-07-20 12:01:03,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628628112] [2020-07-20 12:01:03,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:01:03,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 38 [2020-07-20 12:01:03,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917408699] [2020-07-20 12:01:03,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-20 12:01:03,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:01:03,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-20 12:01:03,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 12:01:03,678 INFO L87 Difference]: Start difference. First operand 402 states and 521 transitions. Second operand 38 states. [2020-07-20 12:01:11,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:01:11,167 INFO L93 Difference]: Finished difference Result 711 states and 940 transitions. [2020-07-20 12:01:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-07-20 12:01:11,168 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 600 [2020-07-20 12:01:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:01:11,172 INFO L225 Difference]: With dead ends: 711 [2020-07-20 12:01:11,172 INFO L226 Difference]: Without dead ends: 529 [2020-07-20 12:01:11,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1313 GetRequests, 1157 SyntacticMatches, 6 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8485 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5519, Invalid=17433, Unknown=0, NotChecked=0, Total=22952 [2020-07-20 12:01:11,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-07-20 12:01:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 434. [2020-07-20 12:01:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-07-20 12:01:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 565 transitions. [2020-07-20 12:01:11,247 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 565 transitions. Word has length 600 [2020-07-20 12:01:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:01:11,248 INFO L479 AbstractCegarLoop]: Abstraction has 434 states and 565 transitions. [2020-07-20 12:01:11,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-20 12:01:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 565 transitions. [2020-07-20 12:01:11,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2020-07-20 12:01:11,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:01:11,254 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 84, 83, 83, 83, 83, 16, 15, 15, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:01:11,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:11,468 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:01:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:01:11,468 INFO L82 PathProgramCache]: Analyzing trace with hash -955730672, now seen corresponding path program 31 times [2020-07-20 12:01:11,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:01:11,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178337769] [2020-07-20 12:01:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:01:11,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 12:01:11,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:01:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25890 backedges. 11585 proven. 1868 refuted. 0 times theorem prover too weak. 12437 trivial. 0 not checked. [2020-07-20 12:01:12,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:01:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 25890 backedges. 5244 proven. 5563 refuted. 0 times theorem prover too weak. 15083 trivial. 0 not checked. [2020-07-20 12:01:13,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178337769] [2020-07-20 12:01:13,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:01:13,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 36 [2020-07-20 12:01:13,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914819116] [2020-07-20 12:01:13,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 12:01:13,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:01:13,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 12:01:13,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 12:01:13,573 INFO L87 Difference]: Start difference. First operand 434 states and 565 transitions. Second operand 36 states. [2020-07-20 12:01:16,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:01:16,337 INFO L93 Difference]: Finished difference Result 642 states and 851 transitions. [2020-07-20 12:01:16,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-20 12:01:16,338 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 662 [2020-07-20 12:01:16,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:01:16,342 INFO L225 Difference]: With dead ends: 642 [2020-07-20 12:01:16,342 INFO L226 Difference]: Without dead ends: 476 [2020-07-20 12:01:16,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1368 GetRequests, 1283 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1819, Invalid=4661, Unknown=0, NotChecked=0, Total=6480 [2020-07-20 12:01:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-07-20 12:01:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 468. [2020-07-20 12:01:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-07-20 12:01:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 612 transitions. [2020-07-20 12:01:16,420 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 612 transitions. Word has length 662 [2020-07-20 12:01:16,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:01:16,420 INFO L479 AbstractCegarLoop]: Abstraction has 468 states and 612 transitions. [2020-07-20 12:01:16,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 12:01:16,420 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 612 transitions. [2020-07-20 12:01:16,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2020-07-20 12:01:16,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:01:16,426 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 85, 84, 84, 84, 84, 16, 15, 15, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:01:16,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:16,640 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:01:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:01:16,640 INFO L82 PathProgramCache]: Analyzing trace with hash 2116259269, now seen corresponding path program 32 times [2020-07-20 12:01:16,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:01:16,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874388003] [2020-07-20 12:01:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:01:16,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 12:01:16,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:01:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 26490 backedges. 2043 proven. 8366 refuted. 0 times theorem prover too weak. 16081 trivial. 0 not checked. [2020-07-20 12:01:17,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:01:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 26490 backedges. 1077 proven. 8366 refuted. 0 times theorem prover too weak. 17047 trivial. 0 not checked. [2020-07-20 12:01:18,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874388003] [2020-07-20 12:01:18,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:01:18,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2020-07-20 12:01:18,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147479579] [2020-07-20 12:01:18,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 12:01:18,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:01:18,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 12:01:18,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-07-20 12:01:18,153 INFO L87 Difference]: Start difference. First operand 468 states and 612 transitions. Second operand 25 states. [2020-07-20 12:01:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:01:21,540 INFO L93 Difference]: Finished difference Result 1038 states and 1381 transitions. [2020-07-20 12:01:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-07-20 12:01:21,541 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 669 [2020-07-20 12:01:21,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:01:21,545 INFO L225 Difference]: With dead ends: 1038 [2020-07-20 12:01:21,545 INFO L226 Difference]: Without dead ends: 861 [2020-07-20 12:01:21,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1409 GetRequests, 1307 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3368 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2002, Invalid=7310, Unknown=0, NotChecked=0, Total=9312 [2020-07-20 12:01:21,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2020-07-20 12:01:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 613. [2020-07-20 12:01:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-07-20 12:01:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 801 transitions. [2020-07-20 12:01:21,665 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 801 transitions. Word has length 669 [2020-07-20 12:01:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:01:21,666 INFO L479 AbstractCegarLoop]: Abstraction has 613 states and 801 transitions. [2020-07-20 12:01:21,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 12:01:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 801 transitions. [2020-07-20 12:01:21,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2020-07-20 12:01:21,673 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:01:21,673 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 90, 89, 89, 89, 89, 17, 16, 16, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:01:21,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:21,874 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:01:21,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:01:21,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1360123809, now seen corresponding path program 33 times [2020-07-20 12:01:21,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:01:21,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243697300] [2020-07-20 12:01:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:01:22,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1251 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 12:01:22,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:01:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 29737 backedges. 12393 proven. 1325 refuted. 0 times theorem prover too weak. 16019 trivial. 0 not checked. [2020-07-20 12:01:22,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:01:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 29737 backedges. 9510 proven. 1346 refuted. 0 times theorem prover too weak. 18881 trivial. 0 not checked. [2020-07-20 12:01:23,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243697300] [2020-07-20 12:01:23,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:01:23,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2020-07-20 12:01:23,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740382331] [2020-07-20 12:01:23,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 12:01:23,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:01:23,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 12:01:23,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-07-20 12:01:23,448 INFO L87 Difference]: Start difference. First operand 613 states and 801 transitions. Second operand 23 states. [2020-07-20 12:01:24,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:01:24,347 INFO L93 Difference]: Finished difference Result 802 states and 1058 transitions. [2020-07-20 12:01:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 12:01:24,352 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 707 [2020-07-20 12:01:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:01:24,355 INFO L225 Difference]: With dead ends: 802 [2020-07-20 12:01:24,355 INFO L226 Difference]: Without dead ends: 490 [2020-07-20 12:01:24,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1428 GetRequests, 1385 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=395, Invalid=1011, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 12:01:24,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-20 12:01:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-07-20 12:01:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-20 12:01:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 638 transitions. [2020-07-20 12:01:24,439 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 638 transitions. Word has length 707 [2020-07-20 12:01:24,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:01:24,440 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 638 transitions. [2020-07-20 12:01:24,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 12:01:24,440 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 638 transitions. [2020-07-20 12:01:24,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2020-07-20 12:01:24,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:01:24,445 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 91, 90, 90, 90, 90, 17, 16, 16, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:01:24,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:24,646 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:01:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:01:24,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1558816766, now seen corresponding path program 34 times [2020-07-20 12:01:24,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:01:24,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027520694] [2020-07-20 12:01:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:01:24,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 12:01:24,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:01:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30380 backedges. 1600 proven. 10313 refuted. 0 times theorem prover too weak. 18467 trivial. 0 not checked. [2020-07-20 12:01:25,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:01:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30380 backedges. 900 proven. 10313 refuted. 0 times theorem prover too weak. 19167 trivial. 0 not checked. [2020-07-20 12:01:26,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027520694] [2020-07-20 12:01:26,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:01:26,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2020-07-20 12:01:26,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804208172] [2020-07-20 12:01:26,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 12:01:26,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:01:26,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 12:01:26,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2020-07-20 12:01:26,444 INFO L87 Difference]: Start difference. First operand 490 states and 638 transitions. Second operand 29 states. [2020-07-20 12:01:32,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:01:32,756 INFO L93 Difference]: Finished difference Result 794 states and 1055 transitions. [2020-07-20 12:01:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-07-20 12:01:32,757 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 714 [2020-07-20 12:01:32,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:01:32,761 INFO L225 Difference]: With dead ends: 794 [2020-07-20 12:01:32,762 INFO L226 Difference]: Without dead ends: 607 [2020-07-20 12:01:32,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1540 GetRequests, 1393 SyntacticMatches, 7 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8078 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4264, Invalid=15758, Unknown=0, NotChecked=0, Total=20022 [2020-07-20 12:01:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2020-07-20 12:01:32,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 514. [2020-07-20 12:01:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-07-20 12:01:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 670 transitions. [2020-07-20 12:01:32,846 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 670 transitions. Word has length 714 [2020-07-20 12:01:32,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:01:32,847 INFO L479 AbstractCegarLoop]: Abstraction has 514 states and 670 transitions. [2020-07-20 12:01:32,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 12:01:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 670 transitions. [2020-07-20 12:01:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2020-07-20 12:01:32,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:01:32,854 INFO L422 BasicCegarLoop]: trace histogram [97, 97, 97, 96, 96, 96, 96, 18, 17, 17, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:01:33,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:33,066 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:01:33,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:01:33,067 INFO L82 PathProgramCache]: Analyzing trace with hash 937711205, now seen corresponding path program 35 times [2020-07-20 12:01:33,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:01:33,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128784729] [2020-07-20 12:01:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:01:33,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 12:01:33,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:01:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 34537 backedges. 14441 proven. 1702 refuted. 0 times theorem prover too weak. 18394 trivial. 0 not checked. [2020-07-20 12:01:33,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:01:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 34537 backedges. 9740 proven. 3289 refuted. 0 times theorem prover too weak. 21508 trivial. 0 not checked. [2020-07-20 12:01:35,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128784729] [2020-07-20 12:01:35,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:01:35,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2020-07-20 12:01:35,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911952153] [2020-07-20 12:01:35,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 12:01:35,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:01:35,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 12:01:35,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2020-07-20 12:01:35,007 INFO L87 Difference]: Start difference. First operand 514 states and 670 transitions. Second operand 27 states. [2020-07-20 12:01:36,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:01:36,451 INFO L93 Difference]: Finished difference Result 684 states and 902 transitions. [2020-07-20 12:01:36,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 12:01:36,453 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 759 [2020-07-20 12:01:36,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:01:36,456 INFO L225 Difference]: With dead ends: 684 [2020-07-20 12:01:36,456 INFO L226 Difference]: Without dead ends: 514 [2020-07-20 12:01:36,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1541 GetRequests, 1485 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=713, Invalid=1837, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 12:01:36,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-07-20 12:01:36,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2020-07-20 12:01:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-07-20 12:01:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 668 transitions. [2020-07-20 12:01:36,550 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 668 transitions. Word has length 759 [2020-07-20 12:01:36,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:01:36,550 INFO L479 AbstractCegarLoop]: Abstraction has 514 states and 668 transitions. [2020-07-20 12:01:36,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 12:01:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 668 transitions. [2020-07-20 12:01:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2020-07-20 12:01:36,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:01:36,555 INFO L422 BasicCegarLoop]: trace histogram [98, 98, 98, 97, 97, 97, 97, 18, 17, 17, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:01:36,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:36,756 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:01:36,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:01:36,757 INFO L82 PathProgramCache]: Analyzing trace with hash -661993672, now seen corresponding path program 36 times [2020-07-20 12:01:36,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:01:36,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700214357] [2020-07-20 12:01:36,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:01:36,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 12:01:36,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:01:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 35230 backedges. 1070 proven. 12705 refuted. 0 times theorem prover too weak. 21455 trivial. 0 not checked. [2020-07-20 12:01:37,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:01:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 35230 backedges. 688 proven. 12705 refuted. 0 times theorem prover too weak. 21837 trivial. 0 not checked. [2020-07-20 12:01:38,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700214357] [2020-07-20 12:01:38,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:01:38,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 33 [2020-07-20 12:01:38,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013662787] [2020-07-20 12:01:38,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 12:01:38,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:01:38,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 12:01:38,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 12:01:38,915 INFO L87 Difference]: Start difference. First operand 514 states and 668 transitions. Second operand 33 states. [2020-07-20 12:01:47,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:01:47,885 INFO L93 Difference]: Finished difference Result 793 states and 1047 transitions. [2020-07-20 12:01:47,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-07-20 12:01:47,886 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 766 [2020-07-20 12:01:47,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:01:47,890 INFO L225 Difference]: With dead ends: 793 [2020-07-20 12:01:47,890 INFO L226 Difference]: Without dead ends: 603 [2020-07-20 12:01:47,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1662 GetRequests, 1493 SyntacticMatches, 7 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10746 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=5648, Invalid=21084, Unknown=0, NotChecked=0, Total=26732 [2020-07-20 12:01:47,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-07-20 12:01:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 541. [2020-07-20 12:01:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2020-07-20 12:01:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 704 transitions. [2020-07-20 12:01:47,977 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 704 transitions. Word has length 766 [2020-07-20 12:01:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:01:47,978 INFO L479 AbstractCegarLoop]: Abstraction has 541 states and 704 transitions. [2020-07-20 12:01:47,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 12:01:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 704 transitions. [2020-07-20 12:01:47,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 819 [2020-07-20 12:01:47,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:01:47,984 INFO L422 BasicCegarLoop]: trace histogram [105, 105, 105, 104, 104, 104, 104, 19, 18, 18, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:01:48,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:48,184 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:01:48,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:01:48,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1871274638, now seen corresponding path program 37 times [2020-07-20 12:01:48,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:01:48,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593978389] [2020-07-20 12:01:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:01:48,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1443 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 12:01:48,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:01:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 40440 backedges. 16938 proven. 2142 refuted. 0 times theorem prover too weak. 21360 trivial. 0 not checked. [2020-07-20 12:01:49,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:01:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 40440 backedges. 10143 proven. 5535 refuted. 0 times theorem prover too weak. 24762 trivial. 0 not checked. [2020-07-20 12:01:50,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593978389] [2020-07-20 12:01:50,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:01:50,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2020-07-20 12:01:50,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691919009] [2020-07-20 12:01:50,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 12:01:50,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:01:50,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 12:01:50,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2020-07-20 12:01:50,543 INFO L87 Difference]: Start difference. First operand 541 states and 704 transitions. Second operand 31 states. [2020-07-20 12:01:52,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:01:52,567 INFO L93 Difference]: Finished difference Result 711 states and 935 transitions. [2020-07-20 12:01:52,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-20 12:01:52,569 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 818 [2020-07-20 12:01:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:01:52,575 INFO L225 Difference]: With dead ends: 711 [2020-07-20 12:01:52,575 INFO L226 Difference]: Without dead ends: 541 [2020-07-20 12:01:52,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1668 GetRequests, 1599 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1113, Invalid=2919, Unknown=0, NotChecked=0, Total=4032 [2020-07-20 12:01:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-07-20 12:01:52,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2020-07-20 12:01:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2020-07-20 12:01:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 702 transitions. [2020-07-20 12:01:52,744 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 702 transitions. Word has length 818 [2020-07-20 12:01:52,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:01:52,746 INFO L479 AbstractCegarLoop]: Abstraction has 541 states and 702 transitions. [2020-07-20 12:01:52,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 12:01:52,746 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 702 transitions. [2020-07-20 12:01:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2020-07-20 12:01:52,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:01:52,761 INFO L422 BasicCegarLoop]: trace histogram [106, 106, 106, 105, 105, 105, 105, 19, 18, 18, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:01:52,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:52,975 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:01:52,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:01:52,975 INFO L82 PathProgramCache]: Analyzing trace with hash -778442869, now seen corresponding path program 38 times [2020-07-20 12:01:52,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:01:52,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579908185] [2020-07-20 12:01:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:01:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:01:53,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1455 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 12:01:53,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:01:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 41190 backedges. 432 proven. 15614 refuted. 0 times theorem prover too weak. 25144 trivial. 0 not checked. [2020-07-20 12:01:54,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:01:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 41190 backedges. 432 proven. 15614 refuted. 0 times theorem prover too weak. 25144 trivial. 0 not checked. [2020-07-20 12:01:55,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579908185] [2020-07-20 12:01:55,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:01:55,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 37 [2020-07-20 12:01:55,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245766097] [2020-07-20 12:01:55,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 12:01:55,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:01:55,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 12:01:55,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 12:01:55,703 INFO L87 Difference]: Start difference. First operand 541 states and 702 transitions. Second operand 37 states. [2020-07-20 12:02:08,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:08,804 INFO L93 Difference]: Finished difference Result 800 states and 1052 transitions. [2020-07-20 12:02:08,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2020-07-20 12:02:08,805 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 825 [2020-07-20 12:02:08,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:08,810 INFO L225 Difference]: With dead ends: 800 [2020-07-20 12:02:08,810 INFO L226 Difference]: Without dead ends: 607 [2020-07-20 12:02:08,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1800 GetRequests, 1607 SyntacticMatches, 7 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14327 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=7368, Invalid=27788, Unknown=0, NotChecked=0, Total=35156 [2020-07-20 12:02:08,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2020-07-20 12:02:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 571. [2020-07-20 12:02:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-07-20 12:02:08,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 742 transitions. [2020-07-20 12:02:08,900 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 742 transitions. Word has length 825 [2020-07-20 12:02:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:08,901 INFO L479 AbstractCegarLoop]: Abstraction has 571 states and 742 transitions. [2020-07-20 12:02:08,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 12:02:08,901 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 742 transitions. [2020-07-20 12:02:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2020-07-20 12:02:08,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:08,907 INFO L422 BasicCegarLoop]: trace histogram [114, 114, 114, 113, 113, 113, 113, 20, 19, 19, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:09,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:09,108 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:09,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:09,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1882081448, now seen corresponding path program 39 times [2020-07-20 12:02:09,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:09,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447108675] [2020-07-20 12:02:09,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:09,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 12:02:09,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 47617 backedges. 19947 proven. 2654 refuted. 0 times theorem prover too weak. 25016 trivial. 0 not checked. [2020-07-20 12:02:10,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:02:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 47617 backedges. 10782 proven. 8093 refuted. 0 times theorem prover too weak. 28742 trivial. 0 not checked. [2020-07-20 12:02:12,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447108675] [2020-07-20 12:02:12,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:02:12,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2020-07-20 12:02:12,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457758248] [2020-07-20 12:02:12,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 12:02:12,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:12,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 12:02:12,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 12:02:12,068 INFO L87 Difference]: Start difference. First operand 571 states and 742 transitions. Second operand 35 states. [2020-07-20 12:02:15,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:15,122 INFO L93 Difference]: Finished difference Result 742 states and 973 transitions. [2020-07-20 12:02:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-20 12:02:15,124 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 884 [2020-07-20 12:02:15,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:15,128 INFO L225 Difference]: With dead ends: 742 [2020-07-20 12:02:15,128 INFO L226 Difference]: Without dead ends: 572 [2020-07-20 12:02:15,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1809 GetRequests, 1727 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1621, Invalid=4231, Unknown=0, NotChecked=0, Total=5852 [2020-07-20 12:02:15,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2020-07-20 12:02:15,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 540. [2020-07-20 12:02:15,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-07-20 12:02:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 697 transitions. [2020-07-20 12:02:15,235 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 697 transitions. Word has length 884 [2020-07-20 12:02:15,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:15,236 INFO L479 AbstractCegarLoop]: Abstraction has 540 states and 697 transitions. [2020-07-20 12:02:15,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 12:02:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 697 transitions. [2020-07-20 12:02:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2020-07-20 12:02:15,244 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:15,244 INFO L422 BasicCegarLoop]: trace histogram [115, 115, 115, 114, 114, 114, 114, 20, 19, 19, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:15,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:15,459 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:15,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:15,460 INFO L82 PathProgramCache]: Analyzing trace with hash 932118245, now seen corresponding path program 40 times [2020-07-20 12:02:15,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:15,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077588123] [2020-07-20 12:02:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:15,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 12:02:15,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:16,618 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:02:16,623 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:02:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 48431 backedges. 18003 proven. 126 refuted. 0 times theorem prover too weak. 30302 trivial. 0 not checked. [2020-07-20 12:02:18,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:02:18,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:02:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 48431 backedges. 7043 proven. 11086 refuted. 0 times theorem prover too weak. 30302 trivial. 0 not checked. [2020-07-20 12:02:20,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077588123] [2020-07-20 12:02:20,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:02:20,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2020-07-20 12:02:20,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788595665] [2020-07-20 12:02:20,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 12:02:20,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:20,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 12:02:20,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 12:02:20,939 INFO L87 Difference]: Start difference. First operand 540 states and 697 transitions. Second operand 35 states. [2020-07-20 12:02:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:23,690 INFO L93 Difference]: Finished difference Result 695 states and 917 transitions. [2020-07-20 12:02:23,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-07-20 12:02:23,692 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 891 [2020-07-20 12:02:23,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:23,699 INFO L225 Difference]: With dead ends: 695 [2020-07-20 12:02:23,699 INFO L226 Difference]: Without dead ends: 693 [2020-07-20 12:02:23,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1821 GetRequests, 1741 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1898, Invalid=3652, Unknown=0, NotChecked=0, Total=5550 [2020-07-20 12:02:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2020-07-20 12:02:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 610. [2020-07-20 12:02:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-07-20 12:02:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 799 transitions. [2020-07-20 12:02:23,789 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 799 transitions. Word has length 891 [2020-07-20 12:02:23,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:23,790 INFO L479 AbstractCegarLoop]: Abstraction has 610 states and 799 transitions. [2020-07-20 12:02:23,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 12:02:23,790 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 799 transitions. [2020-07-20 12:02:23,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 934 [2020-07-20 12:02:23,799 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:23,800 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 121, 120, 120, 120, 120, 20, 19, 19, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:24,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:24,014 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:24,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:24,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1311394747, now seen corresponding path program 41 times [2020-07-20 12:02:24,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:24,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374680354] [2020-07-20 12:02:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:24,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 12:02:24,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 53462 backedges. 4615 proven. 19121 refuted. 0 times theorem prover too weak. 29726 trivial. 0 not checked. [2020-07-20 12:02:25,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:02:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 53462 backedges. 2325 proven. 19121 refuted. 0 times theorem prover too weak. 32016 trivial. 0 not checked. [2020-07-20 12:02:27,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374680354] [2020-07-20 12:02:27,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:02:27,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 41 [2020-07-20 12:02:27,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112821917] [2020-07-20 12:02:27,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-20 12:02:27,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:27,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-20 12:02:27,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1324, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 12:02:27,496 INFO L87 Difference]: Start difference. First operand 610 states and 799 transitions. Second operand 41 states. [2020-07-20 12:02:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:43,576 INFO L93 Difference]: Finished difference Result 920 states and 1236 transitions. [2020-07-20 12:02:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-07-20 12:02:43,578 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 933 [2020-07-20 12:02:43,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:43,583 INFO L225 Difference]: With dead ends: 920 [2020-07-20 12:02:43,583 INFO L226 Difference]: Without dead ends: 697 [2020-07-20 12:02:43,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2024 GetRequests, 1819 SyntacticMatches, 7 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16140 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=8499, Invalid=31301, Unknown=0, NotChecked=0, Total=39800 [2020-07-20 12:02:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-07-20 12:02:43,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 643. [2020-07-20 12:02:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-07-20 12:02:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 843 transitions. [2020-07-20 12:02:43,733 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 843 transitions. Word has length 933 [2020-07-20 12:02:43,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:43,734 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 843 transitions. [2020-07-20 12:02:43,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-20 12:02:43,734 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 843 transitions. [2020-07-20 12:02:43,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1000 [2020-07-20 12:02:43,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:43,746 INFO L422 BasicCegarLoop]: trace histogram [130, 130, 130, 129, 129, 129, 129, 21, 20, 20, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:43,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:43,962 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:43,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:43,963 INFO L82 PathProgramCache]: Analyzing trace with hash -874980193, now seen corresponding path program 42 times [2020-07-20 12:02:43,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:43,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605422470] [2020-07-20 12:02:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:44,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 12:02:44,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 61675 backedges. 28448 proven. 3247 refuted. 0 times theorem prover too weak. 29980 trivial. 0 not checked. [2020-07-20 12:02:45,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:02:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 61675 backedges. 13913 proven. 10972 refuted. 0 times theorem prover too weak. 36790 trivial. 0 not checked. [2020-07-20 12:02:48,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605422470] [2020-07-20 12:02:48,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:02:48,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2020-07-20 12:02:48,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420422001] [2020-07-20 12:02:48,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-20 12:02:48,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:48,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-20 12:02:48,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 12:02:48,114 INFO L87 Difference]: Start difference. First operand 643 states and 843 transitions. Second operand 39 states. [2020-07-20 12:02:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:52,715 INFO L93 Difference]: Finished difference Result 912 states and 1233 transitions. [2020-07-20 12:02:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-07-20 12:02:52,716 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 999 [2020-07-20 12:02:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:52,720 INFO L225 Difference]: With dead ends: 912 [2020-07-20 12:02:52,720 INFO L226 Difference]: Without dead ends: 715 [2020-07-20 12:02:52,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2049 GetRequests, 1953 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2273, Invalid=5917, Unknown=0, NotChecked=0, Total=8190 [2020-07-20 12:02:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-07-20 12:02:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 695. [2020-07-20 12:02:52,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-07-20 12:02:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 919 transitions. [2020-07-20 12:02:52,825 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 919 transitions. Word has length 999 [2020-07-20 12:02:52,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:52,825 INFO L479 AbstractCegarLoop]: Abstraction has 695 states and 919 transitions. [2020-07-20 12:02:52,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-20 12:02:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 919 transitions. [2020-07-20 12:02:52,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1007 [2020-07-20 12:02:52,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:52,833 INFO L422 BasicCegarLoop]: trace histogram [131, 131, 131, 130, 130, 130, 130, 21, 20, 20, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:53,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:53,034 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:53,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1744475458, now seen corresponding path program 43 times [2020-07-20 12:02:53,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:53,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966907753] [2020-07-20 12:02:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:53,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1767 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 12:02:53,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 62602 backedges. 4166 proven. 23316 refuted. 0 times theorem prover too weak. 35120 trivial. 0 not checked. [2020-07-20 12:02:55,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:02:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 62602 backedges. 2158 proven. 23316 refuted. 0 times theorem prover too weak. 37128 trivial. 0 not checked. [2020-07-20 12:02:57,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966907753] [2020-07-20 12:02:57,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:02:57,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 45 [2020-07-20 12:02:57,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743959374] [2020-07-20 12:02:57,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 12:02:57,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:57,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 12:02:57,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 12:02:57,680 INFO L87 Difference]: Start difference. First operand 695 states and 919 transitions. Second operand 45 states. [2020-07-20 12:03:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:03:19,848 INFO L93 Difference]: Finished difference Result 1187 states and 1603 transitions. [2020-07-20 12:03:19,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2020-07-20 12:03:19,850 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 1006 [2020-07-20 12:03:19,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:03:19,856 INFO L225 Difference]: With dead ends: 1187 [2020-07-20 12:03:19,856 INFO L226 Difference]: Without dead ends: 873 [2020-07-20 12:03:19,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2190 GetRequests, 1961 SyntacticMatches, 7 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20395 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=11282, Invalid=38670, Unknown=0, NotChecked=0, Total=49952 [2020-07-20 12:03:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2020-07-20 12:03:19,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 733. [2020-07-20 12:03:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2020-07-20 12:03:19,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 971 transitions. [2020-07-20 12:03:19,995 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 971 transitions. Word has length 1006 [2020-07-20 12:03:19,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:03:19,996 INFO L479 AbstractCegarLoop]: Abstraction has 733 states and 971 transitions. [2020-07-20 12:03:19,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 12:03:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 971 transitions. [2020-07-20 12:03:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1083 [2020-07-20 12:03:20,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:03:20,007 INFO L422 BasicCegarLoop]: trace histogram [141, 141, 141, 140, 140, 140, 140, 22, 21, 21, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:03:20,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:03:20,208 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:03:20,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:03:20,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2076739844, now seen corresponding path program 44 times [2020-07-20 12:03:20,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:03:20,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115516284] [2020-07-20 12:03:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:03:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:03:20,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1899 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 12:03:20,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:03:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 72506 backedges. 33214 proven. 3930 refuted. 0 times theorem prover too weak. 35362 trivial. 0 not checked. [2020-07-20 12:03:22,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:03:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 72506 backedges. 15493 proven. 14181 refuted. 0 times theorem prover too weak. 42832 trivial. 0 not checked. [2020-07-20 12:03:25,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115516284] [2020-07-20 12:03:25,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:03:25,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 43 [2020-07-20 12:03:25,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048625807] [2020-07-20 12:03:25,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-20 12:03:25,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:03:25,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-20 12:03:25,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1433, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 12:03:25,305 INFO L87 Difference]: Start difference. First operand 733 states and 971 transitions. Second operand 43 states. [2020-07-20 12:03:31,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:03:31,869 INFO L93 Difference]: Finished difference Result 1089 states and 1483 transitions. [2020-07-20 12:03:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-07-20 12:03:31,872 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 1082 [2020-07-20 12:03:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:03:31,877 INFO L225 Difference]: With dead ends: 1089 [2020-07-20 12:03:31,877 INFO L226 Difference]: Without dead ends: 804 [2020-07-20 12:03:31,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2226 GetRequests, 2115 SyntacticMatches, 7 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2563 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3117, Invalid=8013, Unknown=0, NotChecked=0, Total=11130 [2020-07-20 12:03:31,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2020-07-20 12:03:32,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 785. [2020-07-20 12:03:32,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 785 states. [2020-07-20 12:03:32,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1046 transitions. [2020-07-20 12:03:32,047 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1046 transitions. Word has length 1082 [2020-07-20 12:03:32,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:03:32,048 INFO L479 AbstractCegarLoop]: Abstraction has 785 states and 1046 transitions. [2020-07-20 12:03:32,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-20 12:03:32,048 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1046 transitions. [2020-07-20 12:03:32,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1090 [2020-07-20 12:03:32,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:03:32,058 INFO L422 BasicCegarLoop]: trace histogram [142, 142, 142, 141, 141, 141, 141, 22, 21, 21, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:03:32,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:03:32,272 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:03:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:03:32,273 INFO L82 PathProgramCache]: Analyzing trace with hash -690954159, now seen corresponding path program 45 times [2020-07-20 12:03:32,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:03:32,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547855279] [2020-07-20 12:03:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:03:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:03:32,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1911 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 12:03:32,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:03:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 73511 backedges. 8093 proven. 22813 refuted. 0 times theorem prover too weak. 42605 trivial. 0 not checked. [2020-07-20 12:03:33,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:03:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 73511 backedges. 3853 proven. 22813 refuted. 0 times theorem prover too weak. 46845 trivial. 0 not checked. [2020-07-20 12:03:36,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547855279] [2020-07-20 12:03:36,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:03:36,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2020-07-20 12:03:36,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447145540] [2020-07-20 12:03:36,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 12:03:36,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:03:36,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 12:03:36,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2020-07-20 12:03:36,321 INFO L87 Difference]: Start difference. First operand 785 states and 1046 transitions. Second operand 28 states. [2020-07-20 12:03:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:03:45,113 INFO L93 Difference]: Finished difference Result 1700 states and 2319 transitions. [2020-07-20 12:03:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-07-20 12:03:45,117 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1089 [2020-07-20 12:03:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:03:45,123 INFO L225 Difference]: With dead ends: 1700 [2020-07-20 12:03:45,124 INFO L226 Difference]: Without dead ends: 1392 [2020-07-20 12:03:45,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2270 GetRequests, 2143 SyntacticMatches, 8 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5615 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3057, Invalid=11463, Unknown=0, NotChecked=0, Total=14520 [2020-07-20 12:03:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2020-07-20 12:03:45,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 984. [2020-07-20 12:03:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-07-20 12:03:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1306 transitions. [2020-07-20 12:03:45,345 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1306 transitions. Word has length 1089 [2020-07-20 12:03:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:03:45,346 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1306 transitions. [2020-07-20 12:03:45,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 12:03:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1306 transitions. [2020-07-20 12:03:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2020-07-20 12:03:45,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:03:45,355 INFO L422 BasicCegarLoop]: trace histogram [148, 148, 148, 147, 147, 147, 147, 23, 22, 22, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:03:45,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:03:45,557 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:03:45,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:03:45,558 INFO L82 PathProgramCache]: Analyzing trace with hash -944230286, now seen corresponding path program 46 times [2020-07-20 12:03:45,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:03:45,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30503731] [2020-07-20 12:03:45,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:03:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:03:45,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1989 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 12:03:45,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:03:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 79907 backedges. 34663 proven. 2592 refuted. 0 times theorem prover too weak. 42652 trivial. 0 not checked. [2020-07-20 12:03:46,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:03:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 79907 backedges. 26745 proven. 2620 refuted. 0 times theorem prover too weak. 50542 trivial. 0 not checked. [2020-07-20 12:03:49,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30503731] [2020-07-20 12:03:49,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:03:49,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2020-07-20 12:03:49,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524177219] [2020-07-20 12:03:49,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 12:03:49,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:03:49,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 12:03:49,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-07-20 12:03:49,897 INFO L87 Difference]: Start difference. First operand 984 states and 1306 transitions. Second operand 26 states. [2020-07-20 12:03:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:03:52,316 INFO L93 Difference]: Finished difference Result 1307 states and 1766 transitions. [2020-07-20 12:03:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 12:03:52,319 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 1134 [2020-07-20 12:03:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:03:52,323 INFO L225 Difference]: With dead ends: 1307 [2020-07-20 12:03:52,324 INFO L226 Difference]: Without dead ends: 810 [2020-07-20 12:03:52,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2284 GetRequests, 2235 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=502, Invalid=1304, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 12:03:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-07-20 12:03:52,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 810. [2020-07-20 12:03:52,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 810 states. [2020-07-20 12:03:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1076 transitions. [2020-07-20 12:03:52,462 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1076 transitions. Word has length 1134 [2020-07-20 12:03:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:03:52,463 INFO L479 AbstractCegarLoop]: Abstraction has 810 states and 1076 transitions. [2020-07-20 12:03:52,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 12:03:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1076 transitions. [2020-07-20 12:03:52,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1142 [2020-07-20 12:03:52,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:03:52,473 INFO L422 BasicCegarLoop]: trace histogram [149, 149, 149, 148, 148, 148, 148, 23, 22, 22, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:03:52,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:03:52,674 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:03:52,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:03:52,675 INFO L82 PathProgramCache]: Analyzing trace with hash -211111029, now seen corresponding path program 47 times [2020-07-20 12:03:52,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:03:52,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177005082] [2020-07-20 12:03:52,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:03:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:03:52,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 2001 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 12:03:52,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:03:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 80962 backedges. 7585 proven. 26386 refuted. 0 times theorem prover too weak. 46991 trivial. 0 not checked. [2020-07-20 12:03:54,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:03:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 80962 backedges. 3651 proven. 26386 refuted. 0 times theorem prover too weak. 50925 trivial. 0 not checked. [2020-07-20 12:03:57,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177005082] [2020-07-20 12:03:57,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:03:57,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 32 [2020-07-20 12:03:57,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804463344] [2020-07-20 12:03:57,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 12:03:57,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:03:57,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 12:03:57,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2020-07-20 12:03:57,613 INFO L87 Difference]: Start difference. First operand 810 states and 1076 transitions. Second operand 32 states. [2020-07-20 12:04:15,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:04:15,406 INFO L93 Difference]: Finished difference Result 1339 states and 1834 transitions. [2020-07-20 12:04:15,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2020-07-20 12:04:15,409 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 1141 [2020-07-20 12:04:15,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:04:15,415 INFO L225 Difference]: With dead ends: 1339 [2020-07-20 12:04:15,415 INFO L226 Difference]: Without dead ends: 1021 [2020-07-20 12:04:15,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2427 GetRequests, 2243 SyntacticMatches, 8 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13489 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=6498, Invalid=25008, Unknown=0, NotChecked=0, Total=31506 [2020-07-20 12:04:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2020-07-20 12:04:15,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 837. [2020-07-20 12:04:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2020-07-20 12:04:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1112 transitions. [2020-07-20 12:04:15,559 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1112 transitions. Word has length 1141 [2020-07-20 12:04:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:04:15,560 INFO L479 AbstractCegarLoop]: Abstraction has 837 states and 1112 transitions. [2020-07-20 12:04:15,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 12:04:15,560 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1112 transitions. [2020-07-20 12:04:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1194 [2020-07-20 12:04:15,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:04:15,570 INFO L422 BasicCegarLoop]: trace histogram [156, 156, 156, 155, 155, 155, 155, 24, 23, 23, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:04:15,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:04:15,771 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:04:15,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:04:15,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2061681211, now seen corresponding path program 48 times [2020-07-20 12:04:15,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:04:15,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484229239] [2020-07-20 12:04:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:04:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:04:16,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 2091 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 12:04:16,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:04:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 88773 backedges. 38543 proven. 3172 refuted. 0 times theorem prover too weak. 47058 trivial. 0 not checked. [2020-07-20 12:04:17,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:04:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 88773 backedges. 27156 proven. 6189 refuted. 0 times theorem prover too weak. 55428 trivial. 0 not checked. [2020-07-20 12:04:20,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484229239] [2020-07-20 12:04:20,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:04:20,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2020-07-20 12:04:20,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366098438] [2020-07-20 12:04:20,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 12:04:20,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:04:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 12:04:20,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2020-07-20 12:04:20,784 INFO L87 Difference]: Start difference. First operand 837 states and 1112 transitions. Second operand 30 states. [2020-07-20 12:04:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:04:24,365 INFO L93 Difference]: Finished difference Result 1138 states and 1543 transitions. [2020-07-20 12:04:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 12:04:24,368 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 1193 [2020-07-20 12:04:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:04:24,373 INFO L225 Difference]: With dead ends: 1138 [2020-07-20 12:04:24,374 INFO L226 Difference]: Without dead ends: 837 [2020-07-20 12:04:24,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2413 GetRequests, 2349 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=911, Invalid=2395, Unknown=0, NotChecked=0, Total=3306 [2020-07-20 12:04:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2020-07-20 12:04:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 837. [2020-07-20 12:04:24,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2020-07-20 12:04:24,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1110 transitions. [2020-07-20 12:04:24,507 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1110 transitions. Word has length 1193 [2020-07-20 12:04:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:04:24,508 INFO L479 AbstractCegarLoop]: Abstraction has 837 states and 1110 transitions. [2020-07-20 12:04:24,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 12:04:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1110 transitions. [2020-07-20 12:04:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1201 [2020-07-20 12:04:24,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:04:24,519 INFO L422 BasicCegarLoop]: trace histogram [157, 157, 157, 156, 156, 156, 156, 24, 23, 23, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:04:24,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:04:24,720 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:04:24,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:04:24,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1739494104, now seen corresponding path program 49 times [2020-07-20 12:04:24,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:04:24,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785425985] [2020-07-20 12:04:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:04:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:04:25,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 2103 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 12:04:25,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:04:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 89885 backedges. 7011 proven. 30616 refuted. 0 times theorem prover too weak. 52258 trivial. 0 not checked. [2020-07-20 12:04:26,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:04:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 89885 backedges. 3423 proven. 30616 refuted. 0 times theorem prover too weak. 55846 trivial. 0 not checked. [2020-07-20 12:04:30,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785425985] [2020-07-20 12:04:30,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:04:30,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 36 [2020-07-20 12:04:30,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226390167] [2020-07-20 12:04:30,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 12:04:30,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:04:30,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 12:04:30,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 12:04:30,375 INFO L87 Difference]: Start difference. First operand 837 states and 1110 transitions. Second operand 36 states. [2020-07-20 12:04:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:04:58,018 INFO L93 Difference]: Finished difference Result 1323 states and 1801 transitions. [2020-07-20 12:04:58,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2020-07-20 12:04:58,021 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 1200 [2020-07-20 12:04:58,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:04:58,029 INFO L225 Difference]: With dead ends: 1323 [2020-07-20 12:04:58,029 INFO L226 Difference]: Without dead ends: 1002 [2020-07-20 12:04:58,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2581 GetRequests, 2357 SyntacticMatches, 8 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20752 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=9652, Invalid=37654, Unknown=0, NotChecked=0, Total=47306 [2020-07-20 12:04:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-07-20 12:04:58,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 867. [2020-07-20 12:04:58,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2020-07-20 12:04:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1150 transitions. [2020-07-20 12:04:58,181 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1150 transitions. Word has length 1200 [2020-07-20 12:04:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:04:58,182 INFO L479 AbstractCegarLoop]: Abstraction has 867 states and 1150 transitions. [2020-07-20 12:04:58,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 12:04:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1150 transitions. [2020-07-20 12:04:58,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1260 [2020-07-20 12:04:58,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:04:58,193 INFO L422 BasicCegarLoop]: trace histogram [165, 165, 165, 164, 164, 164, 164, 25, 24, 24, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:04:58,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:04:58,394 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:04:58,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:04:58,395 INFO L82 PathProgramCache]: Analyzing trace with hash -891846805, now seen corresponding path program 50 times [2020-07-20 12:04:58,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:04:58,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105807795] [2020-07-20 12:04:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:04:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:04:58,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 2205 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 12:04:58,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:05:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 99275 backedges. 43117 proven. 3824 refuted. 0 times theorem prover too weak. 52334 trivial. 0 not checked. [2020-07-20 12:05:00,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:05:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 99275 backedges. 27802 proven. 10229 refuted. 0 times theorem prover too weak. 61244 trivial. 0 not checked. [2020-07-20 12:05:04,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105807795] [2020-07-20 12:05:04,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:05:04,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 34 [2020-07-20 12:05:04,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305257450] [2020-07-20 12:05:04,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 12:05:04,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:05:04,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 12:05:04,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 12:05:04,922 INFO L87 Difference]: Start difference. First operand 867 states and 1150 transitions. Second operand 34 states. [2020-07-20 12:05:09,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:05:09,738 INFO L93 Difference]: Finished difference Result 1168 states and 1580 transitions. [2020-07-20 12:05:09,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-20 12:05:09,741 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 1259 [2020-07-20 12:05:09,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:05:09,746 INFO L225 Difference]: With dead ends: 1168 [2020-07-20 12:05:09,746 INFO L226 Difference]: Without dead ends: 867 [2020-07-20 12:05:09,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2555 GetRequests, 2477 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1406, Invalid=3706, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 12:05:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2020-07-20 12:05:09,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 867. [2020-07-20 12:05:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867 states. [2020-07-20 12:05:09,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1148 transitions. [2020-07-20 12:05:09,894 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1148 transitions. Word has length 1259 [2020-07-20 12:05:09,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:05:09,895 INFO L479 AbstractCegarLoop]: Abstraction has 867 states and 1148 transitions. [2020-07-20 12:05:09,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 12:05:09,895 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1148 transitions. [2020-07-20 12:05:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1267 [2020-07-20 12:05:09,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:05:09,906 INFO L422 BasicCegarLoop]: trace histogram [166, 166, 166, 165, 165, 165, 165, 25, 24, 24, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:05:10,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:05:10,107 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:05:10,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:05:10,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1524872590, now seen corresponding path program 51 times [2020-07-20 12:05:10,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:05:10,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203201680] [2020-07-20 12:05:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:05:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:05:10,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 2217 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 12:05:10,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:05:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 100451 backedges. 6350 proven. 35584 refuted. 0 times theorem prover too weak. 58517 trivial. 0 not checked. [2020-07-20 12:05:12,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:05:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 100451 backedges. 3160 proven. 35584 refuted. 0 times theorem prover too weak. 61707 trivial. 0 not checked. [2020-07-20 12:05:17,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203201680] [2020-07-20 12:05:17,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:05:17,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 40 [2020-07-20 12:05:17,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599746840] [2020-07-20 12:05:17,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 12:05:17,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:05:17,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 12:05:17,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 12:05:17,298 INFO L87 Difference]: Start difference. First operand 867 states and 1148 transitions. Second operand 40 states. [2020-07-20 12:06:01,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:06:01,494 INFO L93 Difference]: Finished difference Result 1310 states and 1773 transitions. [2020-07-20 12:06:01,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2020-07-20 12:06:01,499 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1266 [2020-07-20 12:06:01,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:06:01,505 INFO L225 Difference]: With dead ends: 1310 [2020-07-20 12:06:01,505 INFO L226 Difference]: Without dead ends: 986 [2020-07-20 12:06:01,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2738 GetRequests, 2485 SyntacticMatches, 8 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26619 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=12065, Invalid=48697, Unknown=0, NotChecked=0, Total=60762 [2020-07-20 12:06:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-07-20 12:06:01,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 900. [2020-07-20 12:06:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2020-07-20 12:06:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1192 transitions. [2020-07-20 12:06:01,669 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1192 transitions. Word has length 1266 [2020-07-20 12:06:01,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:06:01,670 INFO L479 AbstractCegarLoop]: Abstraction has 900 states and 1192 transitions. [2020-07-20 12:06:01,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 12:06:01,671 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1192 transitions. [2020-07-20 12:06:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1333 [2020-07-20 12:06:01,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:06:01,683 INFO L422 BasicCegarLoop]: trace histogram [175, 175, 175, 174, 174, 174, 174, 26, 25, 25, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:06:01,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:06:01,884 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:06:01,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:06:01,885 INFO L82 PathProgramCache]: Analyzing trace with hash -719015028, now seen corresponding path program 52 times [2020-07-20 12:06:01,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:06:01,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783283505] [2020-07-20 12:06:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:06:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:06:02,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 2331 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 12:06:02,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:06:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 111605 backedges. 48457 proven. 4557 refuted. 0 times theorem prover too weak. 58591 trivial. 0 not checked. [2020-07-20 12:06:04,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:06:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 111605 backedges. 28755 proven. 14749 refuted. 0 times theorem prover too weak. 68101 trivial. 0 not checked. [2020-07-20 12:06:10,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783283505] [2020-07-20 12:06:10,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:06:10,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 38 [2020-07-20 12:06:10,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925868783] [2020-07-20 12:06:10,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-20 12:06:10,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:06:10,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-20 12:06:10,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1106, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 12:06:10,482 INFO L87 Difference]: Start difference. First operand 900 states and 1192 transitions. Second operand 38 states. [2020-07-20 12:06:20,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:06:20,346 INFO L93 Difference]: Finished difference Result 1201 states and 1621 transitions. [2020-07-20 12:06:20,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-20 12:06:20,350 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 1332 [2020-07-20 12:06:20,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:06:20,357 INFO L225 Difference]: With dead ends: 1201 [2020-07-20 12:06:20,358 INFO L226 Difference]: Without dead ends: 900 [2020-07-20 12:06:20,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2711 GetRequests, 2619 SyntacticMatches, 8 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2005, Invalid=5305, Unknown=0, NotChecked=0, Total=7310 [2020-07-20 12:06:20,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2020-07-20 12:06:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 900. [2020-07-20 12:06:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2020-07-20 12:06:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1190 transitions. [2020-07-20 12:06:20,518 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1190 transitions. Word has length 1332 [2020-07-20 12:06:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:06:20,519 INFO L479 AbstractCegarLoop]: Abstraction has 900 states and 1190 transitions. [2020-07-20 12:06:20,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-20 12:06:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1190 transitions. [2020-07-20 12:06:20,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1340 [2020-07-20 12:06:20,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:06:20,532 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 176, 175, 175, 175, 175, 26, 25, 25, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:06:20,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:06:20,733 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:06:20,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:06:20,735 INFO L82 PathProgramCache]: Analyzing trace with hash -78422223, now seen corresponding path program 53 times [2020-07-20 12:06:20,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:06:20,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469426258] [2020-07-20 12:06:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:06:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:06:21,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 2343 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 12:06:21,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:06:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 112852 backedges. 5581 proven. 41380 refuted. 0 times theorem prover too weak. 65891 trivial. 0 not checked. [2020-07-20 12:06:24,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:06:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 112852 backedges. 2853 proven. 41380 refuted. 0 times theorem prover too weak. 68619 trivial. 0 not checked. [2020-07-20 12:06:30,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469426258] [2020-07-20 12:06:30,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:06:30,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 44 [2020-07-20 12:06:30,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609244390] [2020-07-20 12:06:30,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-20 12:06:30,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:06:30,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-20 12:06:30,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1529, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 12:06:30,456 INFO L87 Difference]: Start difference. First operand 900 states and 1190 transitions. Second operand 44 states. [2020-07-20 12:06:33,373 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:06:33,640 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:06:35,848 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:06:36,383 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:06:37,138 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:06:37,385 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:06:39,718 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:06:39,985 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:06:40,220 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:06:40,716 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:06:43,375 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:06:43,739 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:06:44,073 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:06:45,103 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:06:47,090 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:06:47,393 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:06:49,237 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:06:49,575 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:06:49,885 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:06:50,196 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:06:50,456 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:06:50,871 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-07-20 12:06:52,197 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:06:52,580 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:06:52,932 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:06:53,277 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:06:53,576 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:06:54,054 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-07-20 12:06:55,210 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:06:55,638 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:06:56,044 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:06:56,412 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:06:58,462 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:06:58,997 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 12:06:59,261 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 12:07:00,158 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 12:07:00,821 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:07:01,139 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:07:01,437 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:07:01,725 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:07:01,993 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:07:02,457 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-07-20 12:07:03,539 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:07:03,915 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:07:04,259 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:07:04,589 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:07:05,080 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:07:06,031 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:07:06,518 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2020-07-20 12:07:06,977 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:07:07,776 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:07:08,797 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 12:07:09,148 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 12:07:09,425 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 12:07:10,297 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:07:11,212 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:07:11,681 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:07:12,425 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:07:13,310 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:07:13,627 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:07:19,460 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 12:07:21,054 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:07:21,450 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:07:23,467 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-07-20 12:07:25,674 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:07:27,990 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:07:28,496 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:07:28,980 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:07:29,443 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:07:29,879 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:07:30,278 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:07:31,001 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:07:31,365 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 12:07:31,651 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-07-20 12:07:32,047 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 12:07:32,311 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2020-07-20 12:07:32,565 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:07:34,053 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:07:34,490 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-20 12:07:36,692 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-20 12:07:37,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:07:37,457 INFO L93 Difference]: Finished difference Result 1317 states and 1778 transitions. [2020-07-20 12:07:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2020-07-20 12:07:37,463 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 1339 [2020-07-20 12:07:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:07:37,472 INFO L225 Difference]: With dead ends: 1317 [2020-07-20 12:07:37,472 INFO L226 Difference]: Without dead ends: 990 [2020-07-20 12:07:37,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2904 GetRequests, 2627 SyntacticMatches, 8 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32405 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=14907, Invalid=58263, Unknown=0, NotChecked=0, Total=73170 [2020-07-20 12:07:37,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2020-07-20 12:07:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 936. [2020-07-20 12:07:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 936 states. [2020-07-20 12:07:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1238 transitions. [2020-07-20 12:07:37,664 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1238 transitions. Word has length 1339 [2020-07-20 12:07:37,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:07:37,665 INFO L479 AbstractCegarLoop]: Abstraction has 936 states and 1238 transitions. [2020-07-20 12:07:37,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-20 12:07:37,665 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1238 transitions. [2020-07-20 12:07:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1413 [2020-07-20 12:07:37,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:07:37,681 INFO L422 BasicCegarLoop]: trace histogram [186, 186, 186, 185, 185, 185, 185, 27, 26, 26, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:07:37,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:07:37,882 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:07:37,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:07:37,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2025630034, now seen corresponding path program 54 times [2020-07-20 12:07:37,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:07:37,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816467074] [2020-07-20 12:07:37,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:07:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:07:38,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 2469 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 12:07:38,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:07:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 125976 backedges. 54644 proven. 5380 refuted. 0 times theorem prover too weak. 65952 trivial. 0 not checked. [2020-07-20 12:07:41,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:07:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 125976 backedges. 30096 proven. 19758 refuted. 0 times theorem prover too weak. 76122 trivial. 0 not checked. [2020-07-20 12:07:49,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816467074] [2020-07-20 12:07:49,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:07:49,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 42 [2020-07-20 12:07:49,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946319511] [2020-07-20 12:07:49,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-20 12:07:49,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:07:49,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-20 12:07:49,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1362, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 12:07:49,773 INFO L87 Difference]: Start difference. First operand 936 states and 1238 transitions. Second operand 42 states. [2020-07-20 12:08:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:08:03,577 INFO L93 Difference]: Finished difference Result 1237 states and 1666 transitions. [2020-07-20 12:08:03,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-07-20 12:08:03,582 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 1412 [2020-07-20 12:08:03,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:08:03,590 INFO L225 Difference]: With dead ends: 1237 [2020-07-20 12:08:03,591 INFO L226 Difference]: Without dead ends: 936 [2020-07-20 12:08:03,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2882 GetRequests, 2775 SyntacticMatches, 8 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2295 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=2790, Invalid=7310, Unknown=0, NotChecked=0, Total=10100 [2020-07-20 12:08:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2020-07-20 12:08:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 887. [2020-07-20 12:08:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 887 states. [2020-07-20 12:08:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1165 transitions. [2020-07-20 12:08:03,780 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1165 transitions. Word has length 1412 [2020-07-20 12:08:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:08:03,782 INFO L479 AbstractCegarLoop]: Abstraction has 887 states and 1165 transitions. [2020-07-20 12:08:03,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-20 12:08:03,782 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1165 transitions. [2020-07-20 12:08:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1420 [2020-07-20 12:08:03,799 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:08:03,800 INFO L422 BasicCegarLoop]: trace histogram [187, 187, 187, 186, 186, 186, 186, 27, 26, 26, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:08:04,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:08:04,001 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:08:04,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:08:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1207336619, now seen corresponding path program 55 times [2020-07-20 12:08:04,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:08:04,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627719757] [2020-07-20 12:08:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:08:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:08:04,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 2481 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 12:08:04,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:08:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 127301 backedges. 4683 proven. 48103 refuted. 0 times theorem prover too weak. 74515 trivial. 0 not checked. [2020-07-20 12:08:08,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:08:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 127301 backedges. 2493 proven. 48103 refuted. 0 times theorem prover too weak. 76705 trivial. 0 not checked. [2020-07-20 12:08:17,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627719757] [2020-07-20 12:08:17,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:08:17,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 48 [2020-07-20 12:08:17,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519572891] [2020-07-20 12:08:17,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-20 12:08:17,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:08:17,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-20 12:08:17,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 12:08:17,324 INFO L87 Difference]: Start difference. First operand 887 states and 1165 transitions. Second operand 48 states. [2020-07-20 12:08:17,975 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:08:18,497 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:08:18,819 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 12:08:19,193 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-07-20 12:08:19,457 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:08:19,743 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 12:08:20,053 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 12:08:20,317 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:08:20,607 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:20,857 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:21,160 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2020-07-20 12:08:21,441 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:08:21,808 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 12:08:22,198 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 12:08:22,502 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:08:22,875 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 12:08:23,212 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-07-20 12:08:23,525 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:23,856 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:08:24,145 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:08:24,412 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:24,716 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 12:08:25,043 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:08:25,390 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:08:25,790 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:08:26,132 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:08:26,453 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:26,823 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:08:27,115 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:08:27,504 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 12:08:27,949 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:08:28,266 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 12:08:28,547 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 12:08:28,824 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:08:29,150 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:08:29,623 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:08:29,971 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:08:30,278 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:30,579 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:08:30,852 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:08:31,171 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:08:31,520 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:31,915 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:32,348 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:08:32,724 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:33,066 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:08:33,399 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:08:33,754 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-07-20 12:08:34,065 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-07-20 12:08:34,443 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:08:34,879 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:35,327 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:08:35,723 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:36,093 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:36,454 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:08:36,755 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 12:08:37,110 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:08:37,479 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:08:37,890 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2020-07-20 12:08:38,341 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-07-20 12:08:38,666 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:08:38,951 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:08:39,236 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-07-20 12:08:39,503 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:08:39,794 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2020-07-20 12:08:40,121 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 12:08:40,472 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:08:40,840 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:08:41,147 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:41,442 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:08:41,748 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:08:42,021 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:08:42,346 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-07-20 12:08:42,908 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:08:43,361 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2020-07-20 12:08:43,787 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:08:44,186 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:08:44,543 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2020-07-20 12:08:44,888 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:08:45,250 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2020-07-20 12:08:45,569 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-07-20 12:08:46,013 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:46,538 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:08:47,022 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:08:47,505 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:08:47,954 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:08:48,363 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:08:48,731 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:08:49,047 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:49,417 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-07-20 12:08:49,817 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:50,342 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2020-07-20 12:08:50,952 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:08:51,506 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:08:52,047 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:52,594 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:08:53,099 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:08:53,572 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:54,003 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:54,479 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:08:54,832 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:08:55,281 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-07-20 12:08:55,802 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:08:56,209 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 12:08:56,553 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 12:08:56,882 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 12:08:57,221 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 12:08:57,518 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:08:57,839 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:08:58,195 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-07-20 12:08:58,589 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:08:59,005 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:08:59,386 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:08:59,733 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:09:00,072 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:09:00,387 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:09:00,669 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 12:09:01,001 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 12:09:01,367 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:09:01,836 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:09:02,385 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:09:02,881 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:09:03,388 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:09:03,844 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:09:04,293 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:09:04,691 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:09:05,125 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-07-20 12:09:05,716 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:09:06,317 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:09:06,901 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:09:07,433 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:09:07,971 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:09:08,467 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:09:08,884 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:09:09,286 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:09:09,655 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:09:10,048 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:09:10,501 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:09:11,114 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:09:11,788 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2020-07-20 12:09:12,441 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:09:13,088 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2020-07-20 12:09:13,684 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:09:14,283 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:09:14,829 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:09:15,340 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 12:09:15,792 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2020-07-20 12:09:16,287 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 12:09:16,696 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 12:09:17,287 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2020-07-20 12:09:17,988 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:09:18,608 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:09:19,257 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:09:19,886 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:09:20,448 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:09:20,993 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:09:21,480 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:09:21,893 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:09:22,304 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:09:22,657 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:09:23,048 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:09:23,436 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 12:09:23,962 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:09:24,368 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 12:09:24,773 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 12:09:25,143 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:09:25,504 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2020-07-20 12:09:25,852 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:09:26,195 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 12:09:26,520 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 12:09:26,903 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-20 12:09:27,313 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2020-07-20 12:09:27,760 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:09:28,233 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:09:28,678 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:09:29,109 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:09:29,535 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:09:29,918 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:09:30,302 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:09:30,726 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:09:31,107 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 12:09:31,531 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:09:32,100 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:09:32,719 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:09:33,299 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:09:33,859 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:09:34,404 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:09:34,904 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:09:35,363 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:09:35,809 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:09:36,282 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-07-20 12:09:36,668 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2020-07-20 12:09:37,216 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:09:37,860 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:09:38,492 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:09:39,108 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:09:39,638 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:09:40,144 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:09:40,622 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:09:41,038 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:09:41,454 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:09:41,818 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:09:42,239 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 12:09:42,644 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:09:43,230 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:09:43,901 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:09:44,572 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:09:45,248 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:09:45,886 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:09:46,503 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:09:47,116 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:09:47,670 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:09:48,148 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:09:48,633 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:09:49,107 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 12:09:49,487 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-07-20 12:09:50,015 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 12:09:50,339 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2020-07-20 12:09:51,121 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:09:51,732 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-20 12:09:52,321 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:09:52,918 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:09:53,490 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-20 12:09:54,026 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:09:54,561 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-20 12:09:55,039 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:09:55,470 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:09:55,904 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:09:56,265 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:09:56,583 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-20 12:09:57,405 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:09:57,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:09:57,987 INFO L93 Difference]: Finished difference Result 1261 states and 1689 transitions. [2020-07-20 12:09:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2020-07-20 12:09:57,996 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 1419 [2020-07-20 12:09:57,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:09:58,004 INFO L225 Difference]: With dead ends: 1261 [2020-07-20 12:09:58,005 INFO L226 Difference]: Without dead ends: 980 [2020-07-20 12:09:58,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3078 GetRequests, 2783 SyntacticMatches, 8 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36629 ImplicationChecksByTransitivity, 80.4s TimeCoverageRelationStatistics Valid=16884, Invalid=66348, Unknown=0, NotChecked=0, Total=83232 [2020-07-20 12:09:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-07-20 12:09:58,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 926. [2020-07-20 12:09:58,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-07-20 12:09:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1217 transitions. [2020-07-20 12:09:58,345 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1217 transitions. Word has length 1419 [2020-07-20 12:09:58,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:09:58,347 INFO L479 AbstractCegarLoop]: Abstraction has 926 states and 1217 transitions. [2020-07-20 12:09:58,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-20 12:09:58,347 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1217 transitions. [2020-07-20 12:09:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1500 [2020-07-20 12:09:58,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:09:58,372 INFO L422 BasicCegarLoop]: trace histogram [198, 198, 198, 197, 197, 197, 197, 28, 27, 27, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:09:58,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:09:58,573 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:09:58,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:09:58,575 INFO L82 PathProgramCache]: Analyzing trace with hash 30841381, now seen corresponding path program 56 times [2020-07-20 12:09:58,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:09:58,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889166865] [2020-07-20 12:09:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:09:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:09:59,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 2619 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 12:09:59,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:10:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 142622 backedges. 61768 proven. 6302 refuted. 0 times theorem prover too weak. 74552 trivial. 0 not checked. [2020-07-20 12:10:04,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:10:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 142622 backedges. 31915 proven. 25265 refuted. 0 times theorem prover too weak. 85442 trivial. 0 not checked. [2020-07-20 12:10:16,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889166865] [2020-07-20 12:10:16,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:10:16,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 46 [2020-07-20 12:10:16,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820511298] [2020-07-20 12:10:16,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-20 12:10:16,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:10:16,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-20 12:10:16,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1644, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 12:10:16,214 INFO L87 Difference]: Start difference. First operand 926 states and 1217 transitions. Second operand 46 states. [2020-07-20 12:10:36,092 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2020-07-20 12:10:36,350 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 12:10:36,625 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2020-07-20 12:10:36,915 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 12:10:37,213 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 12:10:37,530 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2020-07-20 12:10:37,883 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 12:10:38,220 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2020-07-20 12:10:38,561 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 12:10:38,927 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 12:10:39,303 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 12:10:39,674 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 12:10:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:10:40,653 INFO L93 Difference]: Finished difference Result 1244 states and 1672 transitions. [2020-07-20 12:10:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-07-20 12:10:40,662 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 1499 [2020-07-20 12:10:40,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:10:40,669 INFO L225 Difference]: With dead ends: 1244 [2020-07-20 12:10:40,669 INFO L226 Difference]: Without dead ends: 992 [2020-07-20 12:10:40,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3068 GetRequests, 2945 SyntacticMatches, 8 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3199 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=3768, Invalid=9804, Unknown=0, NotChecked=0, Total=13572 [2020-07-20 12:10:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2020-07-20 12:10:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 978. [2020-07-20 12:10:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-07-20 12:10:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1291 transitions. [2020-07-20 12:10:40,968 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1291 transitions. Word has length 1499 [2020-07-20 12:10:40,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:10:40,969 INFO L479 AbstractCegarLoop]: Abstraction has 978 states and 1291 transitions. [2020-07-20 12:10:40,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-20 12:10:40,969 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1291 transitions. [2020-07-20 12:10:40,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1507 [2020-07-20 12:10:40,992 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:10:40,992 INFO L422 BasicCegarLoop]: trace histogram [199, 199, 199, 198, 198, 198, 198, 28, 27, 27, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:10:41,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:10:41,194 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:10:41,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:10:41,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1184462216, now seen corresponding path program 57 times [2020-07-20 12:10:41,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:10:41,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803326572] [2020-07-20 12:10:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:10:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:10:41,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 2631 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 12:10:41,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:10:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 144032 backedges. 3635 proven. 55861 refuted. 0 times theorem prover too weak. 84536 trivial. 0 not checked. [2020-07-20 12:10:47,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:11:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 144032 backedges. 2071 proven. 55861 refuted. 0 times theorem prover too weak. 86100 trivial. 0 not checked. [2020-07-20 12:11:00,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803326572] [2020-07-20 12:11:00,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:11:00,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 52 [2020-07-20 12:11:00,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285113670] [2020-07-20 12:11:00,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-20 12:11:00,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:11:00,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-20 12:11:00,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=2159, Unknown=0, NotChecked=0, Total=2652 [2020-07-20 12:11:00,081 INFO L87 Difference]: Start difference. First operand 978 states and 1291 transitions. Second operand 52 states. [2020-07-20 12:11:01,010 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 12:11:01,353 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:11:01,705 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:02,172 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:11:02,691 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:11:03,018 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:11:03,363 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 12:11:03,751 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:04,128 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:11:04,541 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:04,996 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:11:05,348 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:11:05,812 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:11:06,402 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 12:11:06,785 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 12:11:07,122 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 12:11:07,482 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 12:11:07,903 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:11:08,331 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:11:08,768 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:11:09,145 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:11:09,571 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:11:09,952 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 12:11:10,282 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:11:10,725 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:11:11,142 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:11,533 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:11,876 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:11:12,269 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-07-20 12:11:12,665 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:11:13,172 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:13,721 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2020-07-20 12:11:14,094 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:11:14,434 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2020-07-20 12:11:14,745 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:11:15,098 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 12:11:15,687 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:16,176 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2020-07-20 12:11:16,585 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:16,957 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2020-07-20 12:11:17,368 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:11:17,705 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:11:18,130 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:11:18,683 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:19,187 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:11:19,642 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:20,037 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:11:20,399 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:11:20,819 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-07-20 12:11:21,269 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 12:11:21,815 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:11:22,411 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:22,997 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:23,549 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:11:24,090 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:11:24,551 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:25,040 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:11:25,413 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-07-20 12:11:25,906 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-07-20 12:11:26,514 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 12:11:26,943 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-07-20 12:11:27,339 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 12:11:27,701 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 12:11:28,035 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:11:28,397 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:11:28,780 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 12:11:29,287 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:29,819 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:11:30,283 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:11:30,703 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:11:31,082 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:11:31,485 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:11:32,042 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:11:32,614 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:33,172 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:33,675 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:11:34,136 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:11:34,483 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:34,814 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:11:35,197 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:11:35,641 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:11:36,204 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:11:36,788 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:11:37,340 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:37,912 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:11:38,447 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:38,913 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:11:39,360 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 12:11:39,845 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:11:40,267 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-07-20 12:11:40,852 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:11:41,533 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:11:42,196 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2020-07-20 12:11:42,824 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:43,463 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:44,043 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:44,563 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 12:11:45,030 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2020-07-20 12:11:45,443 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-20 12:11:45,886 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:11:46,359 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:46,958 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:47,611 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:11:48,077 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:11:48,503 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:11:48,905 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2020-07-20 12:11:49,303 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:11:49,667 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-07-20 12:11:50,065 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 12:11:50,490 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:11:51,020 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:11:51,581 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:52,122 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:52,619 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:53,056 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:11:53,461 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:11:53,914 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:11:54,340 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:11:54,922 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2020-07-20 12:11:55,647 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:11:56,243 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:11:56,843 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:11:57,399 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2020-07-20 12:11:57,918 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:11:58,406 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:11:58,774 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2020-07-20 12:11:59,146 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2020-07-20 12:11:59,985 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:12:00,698 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:12:01,351 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:12:01,963 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:12:02,591 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:12:03,155 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:12:03,700 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:12:04,216 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:12:04,730 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-07-20 12:12:05,157 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-07-20 12:12:05,847 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:12:06,651 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:12:07,396 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:12:08,125 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:12:08,828 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:12:09,518 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:12:10,137 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:12:10,722 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:12:11,219 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:12:11,658 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:12:12,141 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-07-20 12:12:12,683 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 12:12:13,483 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2020-07-20 12:12:14,384 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:12:15,245 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-07-20 12:12:16,095 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:12:16,888 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:12:17,666 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:12:18,408 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:12:19,087 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:12:19,735 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:12:20,301 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2020-07-20 12:12:20,871 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:12:21,329 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-07-20 12:12:21,854 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2020-07-20 12:12:22,365 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:12:22,869 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 12:12:23,373 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 12:12:23,744 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 12:12:24,137 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 12:12:24,520 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:12:24,885 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 12:12:25,297 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-20 12:12:25,730 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:12:26,286 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:12:26,868 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:12:27,387 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:12:27,917 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:12:28,403 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:12:28,892 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:12:29,356 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:12:29,854 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 12:12:30,298 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-07-20 12:12:30,882 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:12:31,607 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:12:32,274 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:12:32,897 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:12:33,519 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2020-07-20 12:12:34,093 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:12:34,649 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:12:35,145 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:12:35,585 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:12:36,082 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-07-20 12:12:36,601 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:12:37,356 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:12:38,173 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:12:38,950 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:12:39,691 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:12:40,414 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:12:41,115 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:12:41,770 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:12:42,405 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:12:42,940 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:12:43,491 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 12:12:44,326 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:12:45,243 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:12:46,105 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:12:46,946 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:12:47,745 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:12:48,473 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:12:49,151 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:12:49,749 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:12:50,307 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:12:50,804 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:12:51,224 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:12:51,685 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 12:12:52,150 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:12:53,004 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:12:53,889 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:12:54,812 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:12:55,746 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:12:56,634 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:12:57,495 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 12:12:58,298 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:12:59,126 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-07-20 12:12:59,874 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-07-20 12:13:00,523 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:13:01,103 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-07-20 12:13:01,707 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-07-20 12:13:02,146 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-07-20 12:13:02,810 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 12:13:03,255 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-07-20 12:13:04,259 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:13:05,108 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-20 12:13:05,958 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:13:06,748 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:13:07,519 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:13:08,261 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-20 12:13:08,939 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-20 12:13:09,305 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:13:09,623 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-07-20 12:13:10,380 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:13:11,033 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:13:11,636 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:13:12,195 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:13:12,678 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:13:13,058 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-20 12:13:14,195 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-20 12:13:14,702 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2020-07-20 12:13:14,956 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 12:13:15,485 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:13:15,834 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-07-20 12:13:16,289 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:13:16,598 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:13:17,019 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-07-20 12:13:17,376 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-07-20 12:13:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:13:17,497 INFO L93 Difference]: Finished difference Result 1607 states and 2160 transitions. [2020-07-20 12:13:17,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 267 states. [2020-07-20 12:13:17,508 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 1506 [2020-07-20 12:13:17,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:13:17,515 INFO L225 Difference]: With dead ends: 1607 [2020-07-20 12:13:17,515 INFO L226 Difference]: Without dead ends: 1216 [2020-07-20 12:13:17,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3272 GetRequests, 2953 SyntacticMatches, 8 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43103 ImplicationChecksByTransitivity, 111.0s TimeCoverageRelationStatistics Valid=21324, Invalid=76332, Unknown=0, NotChecked=0, Total=97656 [2020-07-20 12:13:17,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2020-07-20 12:13:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1022. [2020-07-20 12:13:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1022 states. [2020-07-20 12:13:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1351 transitions. [2020-07-20 12:13:17,798 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1351 transitions. Word has length 1506 [2020-07-20 12:13:17,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:13:17,799 INFO L479 AbstractCegarLoop]: Abstraction has 1022 states and 1351 transitions. [2020-07-20 12:13:17,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-20 12:13:17,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1351 transitions. [2020-07-20 12:13:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1597 [2020-07-20 12:13:17,823 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:13:17,824 INFO L422 BasicCegarLoop]: trace histogram [211, 211, 211, 210, 210, 210, 210, 29, 28, 28, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:13:18,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:13:18,025 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:13:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:13:18,027 INFO L82 PathProgramCache]: Analyzing trace with hash 458941342, now seen corresponding path program 58 times [2020-07-20 12:13:18,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:13:18,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170130143] [2020-07-20 12:13:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:13:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:13:18,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 2787 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 12:13:18,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:13:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 161849 backedges. 69978 proven. 7332 refuted. 0 times theorem prover too weak. 84539 trivial. 0 not checked. [2020-07-20 12:13:25,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:13:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 161849 backedges. 34361 proven. 31279 refuted. 0 times theorem prover too weak. 96209 trivial. 0 not checked. [2020-07-20 12:13:42,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170130143] [2020-07-20 12:13:42,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:13:42,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 50 [2020-07-20 12:13:42,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054257082] [2020-07-20 12:13:42,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 12:13:42,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:13:42,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 12:13:42,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=1952, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 12:13:42,416 INFO L87 Difference]: Start difference. First operand 1022 states and 1351 transitions. Second operand 50 states.