/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/recursive-simple/fibo_10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:42:12,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:42:12,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:42:12,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:42:12,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:42:12,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:42:12,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:42:12,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:42:12,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:42:12,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:42:12,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:42:12,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:42:12,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:42:12,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:42:12,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:42:12,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:42:12,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:42:12,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:42:12,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:42:12,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:42:12,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:42:12,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:42:12,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:42:12,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:42:12,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:42:12,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:42:12,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:42:12,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:42:12,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 10:42:12,976 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:42:12,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:42:12,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:42:12,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:42:12,979 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:42:12,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:42:12,979 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:42:12,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:42:12,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:42:12,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:42:12,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:42:12,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:42:12,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:42:12,982 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:42:12,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:42:12,983 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:42:12,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:42:12,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:42:12,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:42:12,983 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:42:12,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:42:12,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:42:12,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:42:12,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:42:12,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:42:12,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:42:12,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:12,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:42:12,986 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:42:12,986 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 [2020-07-21 10:42:13,267 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:42:13,279 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:42:13,283 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:42:13,285 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:42:13,285 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:42:13,286 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_10-2.c [2020-07-21 10:42:13,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/457d9e5d7/4e24d5d83d4042a3a22eac9f5a38f36b/FLAG94907d14f [2020-07-21 10:42:13,835 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:42:13,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_10-2.c [2020-07-21 10:42:13,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/457d9e5d7/4e24d5d83d4042a3a22eac9f5a38f36b/FLAG94907d14f [2020-07-21 10:42:14,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/457d9e5d7/4e24d5d83d4042a3a22eac9f5a38f36b [2020-07-21 10:42:14,203 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:42:14,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:42:14,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:42:14,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:42:14,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:42:14,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:42:14" (1/1) ... [2020-07-21 10:42:14,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1366f46d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:14, skipping insertion in model container [2020-07-21 10:42:14,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:42:14" (1/1) ... [2020-07-21 10:42:14,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:42:14,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:42:14,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:42:14,466 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:42:14,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:42:14,503 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:42:14,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:14 WrapperNode [2020-07-21 10:42:14,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:42:14,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:42:14,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:42:14,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:42:14,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:14" (1/1) ... [2020-07-21 10:42:14,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:14" (1/1) ... [2020-07-21 10:42:14,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:14" (1/1) ... [2020-07-21 10:42:14,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:14" (1/1) ... [2020-07-21 10:42:14,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:14" (1/1) ... [2020-07-21 10:42:14,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:14" (1/1) ... [2020-07-21 10:42:14,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:14" (1/1) ... [2020-07-21 10:42:14,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:42:14,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:42:14,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:42:14,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:42:14,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:42:14,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:42:14,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:42:14,706 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 10:42:14,706 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:42:14,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:42:14,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:42:14,706 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 10:42:14,706 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:42:14,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:42:14,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:42:14,888 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:42:14,888 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:42:14,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:42:14 BoogieIcfgContainer [2020-07-21 10:42:14,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:42:14,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:42:14,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:42:14,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:42:14,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:42:14" (1/3) ... [2020-07-21 10:42:14,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ab1336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:42:14, skipping insertion in model container [2020-07-21 10:42:14,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:42:14" (2/3) ... [2020-07-21 10:42:14,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ab1336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:42:14, skipping insertion in model container [2020-07-21 10:42:14,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:42:14" (3/3) ... [2020-07-21 10:42:14,901 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_10-2.c [2020-07-21 10:42:14,913 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:42:14,921 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:42:14,936 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:42:14,970 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:42:14,970 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:42:14,970 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:42:14,971 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:42:14,971 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:42:14,971 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:42:14,972 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:42:14,972 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:42:15,004 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 10:42:15,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 10:42:15,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:15,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:15,020 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:15,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:15,036 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 10:42:15,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:15,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634248990] [2020-07-21 10:42:15,048 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 [2020-07-21 10:42:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:15,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:42:15,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:15,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:42:15,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:42:15,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634248990] [2020-07-21 10:42:15,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:42:15,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:42:15,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648173627] [2020-07-21 10:42:15,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:42:15,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:15,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:42:15,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:42:15,223 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 10:42:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:15,333 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 10:42:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:42:15,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 10:42:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:15,346 INFO L225 Difference]: With dead ends: 35 [2020-07-21 10:42:15,347 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 10:42:15,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:42:15,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 10:42:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 10:42:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 10:42:15,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 10:42:15,395 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 10:42:15,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:15,395 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 10:42:15,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:42:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 10:42:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 10:42:15,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:15,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:15,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:15,614 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:15,616 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 10:42:15,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:15,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741357919] [2020-07-21 10:42:15,617 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 [2020-07-21 10:42:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:42:15,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:42:15,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:42:15,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741357919] [2020-07-21 10:42:15,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:42:15,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:42:15,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373352716] [2020-07-21 10:42:15,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:42:15,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:15,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:42:15,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:42:15,696 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 10:42:15,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:15,779 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 10:42:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:42:15,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 10:42:15,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:15,782 INFO L225 Difference]: With dead ends: 27 [2020-07-21 10:42:15,782 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 10:42:15,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:42:15,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 10:42:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 10:42:15,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 10:42:15,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 10:42:15,792 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 10:42:15,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:15,792 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 10:42:15,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:42:15,793 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 10:42:15,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 10:42:15,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:15,794 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:16,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:16,008 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:16,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:16,009 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 10:42:16,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:16,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580346733] [2020-07-21 10:42:16,011 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 [2020-07-21 10:42:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:16,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:42:16,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:42:16,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:16,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 10:42:16,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580346733] [2020-07-21 10:42:16,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:16,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 10:42:16,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873261787] [2020-07-21 10:42:16,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 10:42:16,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:16,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 10:42:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:42:16,356 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 10:42:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:16,476 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 10:42:16,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:42:16,477 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 10:42:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:16,479 INFO L225 Difference]: With dead ends: 32 [2020-07-21 10:42:16,479 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 10:42:16,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:42:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 10:42:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 10:42:16,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 10:42:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 10:42:16,489 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 10:42:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:16,490 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 10:42:16,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 10:42:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 10:42:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 10:42:16,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:16,492 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:16,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:16,706 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:16,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:16,707 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 10:42:16,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:16,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863754804] [2020-07-21 10:42:16,708 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 [2020-07-21 10:42:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:16,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:42:16,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 10:42:16,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:16,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 10:42:16,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863754804] [2020-07-21 10:42:16,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:16,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 10:42:16,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388658765] [2020-07-21 10:42:16,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 10:42:16,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:16,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 10:42:16,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:42:16,995 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 10:42:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:17,104 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 10:42:17,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:42:17,105 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 10:42:17,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:17,111 INFO L225 Difference]: With dead ends: 37 [2020-07-21 10:42:17,111 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 10:42:17,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:42:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 10:42:17,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 10:42:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 10:42:17,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 10:42:17,128 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 10:42:17,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:17,129 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 10:42:17,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 10:42:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 10:42:17,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 10:42:17,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:17,134 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:17,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:17,343 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:17,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:17,343 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 10:42:17,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:17,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711650998] [2020-07-21 10:42:17,345 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 [2020-07-21 10:42:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:17,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:42:17,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 10:42:17,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:17,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:17,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:17,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:17,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 10:42:17,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711650998] [2020-07-21 10:42:17,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:17,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 10:42:17,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166620623] [2020-07-21 10:42:17,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:42:17,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:17,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:42:17,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:42:17,809 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 10:42:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:17,962 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 10:42:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:42:17,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 10:42:17,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:17,966 INFO L225 Difference]: With dead ends: 42 [2020-07-21 10:42:17,967 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 10:42:17,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:42:17,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 10:42:17,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 10:42:17,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 10:42:17,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 10:42:17,977 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 10:42:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:17,978 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 10:42:17,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:42:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 10:42:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 10:42:17,980 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:17,980 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:18,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:18,185 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:18,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:18,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 10:42:18,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:18,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824073681] [2020-07-21 10:42:18,188 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 [2020-07-21 10:42:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:18,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:42:18,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 10:42:18,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:18,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:18,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:18,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 10:42:18,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824073681] [2020-07-21 10:42:18,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:18,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 10:42:18,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345807714] [2020-07-21 10:42:18,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:42:18,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:18,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:42:18,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:42:18,575 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 10:42:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:18,713 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 10:42:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:42:18,714 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 10:42:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:18,721 INFO L225 Difference]: With dead ends: 47 [2020-07-21 10:42:18,722 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 10:42:18,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:42:18,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 10:42:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 10:42:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 10:42:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 10:42:18,744 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 10:42:18,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:18,745 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 10:42:18,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:42:18,747 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 10:42:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 10:42:18,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:18,756 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:18,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:18,957 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:18,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:18,957 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 10:42:18,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:18,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289627661] [2020-07-21 10:42:18,958 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 [2020-07-21 10:42:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:19,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:42:19,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 10:42:19,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:19,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:19,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:19,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:19,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:19,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 10:42:19,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289627661] [2020-07-21 10:42:19,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:19,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 10:42:19,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013765731] [2020-07-21 10:42:19,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:42:19,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:19,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:42:19,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:42:19,706 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 10:42:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:19,891 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 10:42:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:42:19,892 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 10:42:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:19,895 INFO L225 Difference]: With dead ends: 52 [2020-07-21 10:42:19,895 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 10:42:19,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:42:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 10:42:19,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 10:42:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 10:42:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 10:42:19,907 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 10:42:19,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:19,908 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 10:42:19,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:42:19,908 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 10:42:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 10:42:19,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:19,911 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:20,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:20,115 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:20,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 10:42:20,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:20,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073494659] [2020-07-21 10:42:20,117 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 [2020-07-21 10:42:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:20,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:42:20,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-21 10:42:20,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:20,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:20,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:20,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:20,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-21 10:42:20,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073494659] [2020-07-21 10:42:20,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:20,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 10:42:20,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663044792] [2020-07-21 10:42:20,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:42:20,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:20,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:42:20,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:42:20,864 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 10:42:20,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:20,997 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 10:42:20,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:42:20,998 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-21 10:42:20,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:21,000 INFO L225 Difference]: With dead ends: 57 [2020-07-21 10:42:21,000 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 10:42:21,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:42:21,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 10:42:21,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 10:42:21,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 10:42:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 10:42:21,014 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-21 10:42:21,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:21,014 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 10:42:21,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:42:21,015 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 10:42:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 10:42:21,017 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:21,017 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:21,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:21,232 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:21,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:21,233 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-21 10:42:21,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:21,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799737425] [2020-07-21 10:42:21,234 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 [2020-07-21 10:42:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:21,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:42:21,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 10:42:21,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:21,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:21,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:22,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:22,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:22,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 10:42:22,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799737425] [2020-07-21 10:42:22,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:22,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 10:42:22,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833845916] [2020-07-21 10:42:22,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:42:22,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:22,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:42:22,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:42:22,374 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 10:42:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:22,664 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 10:42:22,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:42:22,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-21 10:42:22,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:22,668 INFO L225 Difference]: With dead ends: 62 [2020-07-21 10:42:22,669 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 10:42:22,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:42:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 10:42:22,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 10:42:22,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 10:42:22,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 10:42:22,683 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-21 10:42:22,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:22,683 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 10:42:22,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:42:22,684 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 10:42:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 10:42:22,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:22,687 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:22,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:22,903 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:22,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:22,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-21 10:42:22,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:22,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98478155] [2020-07-21 10:42:22,904 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 [2020-07-21 10:42:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:23,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:42:23,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 506 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-07-21 10:42:23,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:23,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:23,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:24,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:24,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:24,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:24,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 532 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2020-07-21 10:42:24,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98478155] [2020-07-21 10:42:24,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:24,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 10:42:24,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418389219] [2020-07-21 10:42:24,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:42:24,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:24,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:42:24,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:42:24,194 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 10:42:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:24,369 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 10:42:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:42:24,370 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-21 10:42:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:24,374 INFO L225 Difference]: With dead ends: 67 [2020-07-21 10:42:24,374 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 10:42:24,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:42:24,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 10:42:24,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 10:42:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 10:42:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 10:42:24,387 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-21 10:42:24,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:24,388 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 10:42:24,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:42:24,388 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 10:42:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 10:42:24,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:24,392 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:24,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:24,606 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-21 10:42:24,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:24,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077483216] [2020-07-21 10:42:24,608 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 [2020-07-21 10:42:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:24,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:42:24,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-21 10:42:24,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:26,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:26,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:26,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:26,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:26,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:26,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-21 10:42:26,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077483216] [2020-07-21 10:42:26,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:26,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 10:42:26,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810621059] [2020-07-21 10:42:26,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:42:26,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:26,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:42:26,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:42:26,773 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 10:42:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:26,998 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 10:42:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:42:26,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 10:42:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:27,001 INFO L225 Difference]: With dead ends: 72 [2020-07-21 10:42:27,001 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 10:42:27,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:42:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 10:42:27,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 10:42:27,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 10:42:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 10:42:27,014 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 10:42:27,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:27,015 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 10:42:27,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:42:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 10:42:27,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-07-21 10:42:27,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:27,021 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 35, 21, 21, 21, 21, 21, 21, 21, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:27,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:27,236 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:27,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1101007572, now seen corresponding path program 5 times [2020-07-21 10:42:27,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:27,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093694581] [2020-07-21 10:42:27,238 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 [2020-07-21 10:42:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:27,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:42:27,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1061 refuted. 0 times theorem prover too weak. 3827 trivial. 0 not checked. [2020-07-21 10:42:27,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:28,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:29,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:29,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:29,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:29,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:29,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1101 refuted. 0 times theorem prover too weak. 3787 trivial. 0 not checked. [2020-07-21 10:42:29,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093694581] [2020-07-21 10:42:29,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:29,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 10:42:29,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062569322] [2020-07-21 10:42:29,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:42:29,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:29,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:42:29,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:42:29,452 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-21 10:42:29,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:29,710 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 10:42:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:42:29,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 300 [2020-07-21 10:42:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:29,717 INFO L225 Difference]: With dead ends: 77 [2020-07-21 10:42:29,718 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 10:42:29,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 572 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:42:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 10:42:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 10:42:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 10:42:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 10:42:29,747 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 300 [2020-07-21 10:42:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:29,749 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 10:42:29,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:42:29,749 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 10:42:29,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-21 10:42:29,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:29,760 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 36, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:29,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:29,974 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:29,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:29,975 INFO L82 PathProgramCache]: Analyzing trace with hash -897924696, now seen corresponding path program 6 times [2020-07-21 10:42:29,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:29,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622187750] [2020-07-21 10:42:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:30,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:42:30,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12915 backedges. 306 proven. 1995 refuted. 0 times theorem prover too weak. 10614 trivial. 0 not checked. [2020-07-21 10:42:30,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:32,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:32,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:33,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:33,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:33,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:33,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:33,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:33,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12915 backedges. 306 proven. 2046 refuted. 0 times theorem prover too weak. 10563 trivial. 0 not checked. [2020-07-21 10:42:33,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622187750] [2020-07-21 10:42:33,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:33,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 10:42:33,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108276552] [2020-07-21 10:42:33,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 10:42:33,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:33,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 10:42:33,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:42:33,571 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-21 10:42:33,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:33,913 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 10:42:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:42:33,913 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 468 [2020-07-21 10:42:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:33,917 INFO L225 Difference]: With dead ends: 82 [2020-07-21 10:42:33,917 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 10:42:33,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 905 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:42:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 10:42:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 10:42:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 10:42:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 10:42:33,931 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 468 [2020-07-21 10:42:33,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:33,932 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 10:42:33,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 10:42:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 10:42:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 10:42:33,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:33,936 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 53, 32, 32, 32, 32, 32, 32, 32, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:34,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:34,151 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:34,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:34,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1350718391, now seen corresponding path program 6 times [2020-07-21 10:42:34,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:34,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686489309] [2020-07-21 10:42:34,153 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 [2020-07-21 10:42:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:34,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:42:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1918 refuted. 0 times theorem prover too weak. 9431 trivial. 0 not checked. [2020-07-21 10:42:34,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:36,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:36,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:36,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:37,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:37,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:37,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:37,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:37,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:37,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1975 refuted. 0 times theorem prover too weak. 9374 trivial. 0 not checked. [2020-07-21 10:42:37,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686489309] [2020-07-21 10:42:37,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:37,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 10:42:37,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168584072] [2020-07-21 10:42:37,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 10:42:37,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:37,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 10:42:37,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:42:37,739 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-21 10:42:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:38,241 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-21 10:42:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:42:38,242 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 450 [2020-07-21 10:42:38,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:38,248 INFO L225 Difference]: With dead ends: 87 [2020-07-21 10:42:38,250 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 10:42:38,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 868 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:42:38,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 10:42:38,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-21 10:42:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 10:42:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 10:42:38,290 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 450 [2020-07-21 10:42:38,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:38,291 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 10:42:38,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 10:42:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 10:42:38,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-21 10:42:38,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:38,302 INFO L422 BasicCegarLoop]: trace histogram [133, 133, 67, 66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:38,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:38,517 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:38,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:38,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1701713687, now seen corresponding path program 7 times [2020-07-21 10:42:38,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:38,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321760621] [2020-07-21 10:42:38,518 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 [2020-07-21 10:42:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:38,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 1944 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:42:38,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 778 proven. 4406 refuted. 0 times theorem prover too weak. 40653 trivial. 0 not checked. [2020-07-21 10:42:39,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:42,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:42,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:43,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:44,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:44,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:44,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:44,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:44,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:44,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:44,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:44,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:44,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 778 proven. 4476 refuted. 0 times theorem prover too weak. 40583 trivial. 0 not checked. [2020-07-21 10:42:45,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321760621] [2020-07-21 10:42:45,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:45,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 10:42:45,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647965529] [2020-07-21 10:42:45,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:42:45,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:45,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:42:45,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:42:45,318 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-21 10:42:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:45,671 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-21 10:42:45,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:42:45,672 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 871 [2020-07-21 10:42:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:45,677 INFO L225 Difference]: With dead ends: 92 [2020-07-21 10:42:45,678 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 10:42:45,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1750 GetRequests, 1707 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:42:45,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 10:42:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-21 10:42:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 10:42:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 10:42:45,704 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 871 [2020-07-21 10:42:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:45,707 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 10:42:45,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:42:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 10:42:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1229 [2020-07-21 10:42:45,722 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:45,723 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 147, 89, 89, 89, 89, 89, 89, 89, 58, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:45,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:45,938 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:45,939 INFO L82 PathProgramCache]: Analyzing trace with hash 104339052, now seen corresponding path program 7 times [2020-07-21 10:42:45,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:45,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021908725] [2020-07-21 10:42:45,940 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 [2020-07-21 10:42:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:46,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 2727 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:42:46,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 90119 backedges. 893 proven. 6738 refuted. 0 times theorem prover too weak. 82488 trivial. 0 not checked. [2020-07-21 10:42:47,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:51,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:51,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:52,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 90119 backedges. 893 proven. 6815 refuted. 0 times theorem prover too weak. 82411 trivial. 0 not checked. [2020-07-21 10:42:54,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021908725] [2020-07-21 10:42:54,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:54,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 10:42:54,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735952469] [2020-07-21 10:42:54,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:42:54,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:54,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:42:54,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:42:54,950 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 21 states. [2020-07-21 10:42:55,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:55,508 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-21 10:42:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:42:55,509 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1228 [2020-07-21 10:42:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:55,514 INFO L225 Difference]: With dead ends: 97 [2020-07-21 10:42:55,515 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 10:42:55,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2463 GetRequests, 2420 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:42:55,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 10:42:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-21 10:42:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 10:42:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 10:42:55,532 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1228 [2020-07-21 10:42:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:55,534 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 10:42:55,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:42:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 10:42:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1951 [2020-07-21 10:42:55,564 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:55,565 INFO L422 BasicCegarLoop]: trace histogram [299, 299, 150, 149, 149, 149, 149, 149, 149, 149, 149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:55,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:55,780 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:55,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:55,781 INFO L82 PathProgramCache]: Analyzing trace with hash 621098440, now seen corresponding path program 8 times [2020-07-21 10:42:55,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:55,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650274722] [2020-07-21 10:42:55,782 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 [2020-07-21 10:42:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:56,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 4351 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:42:56,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 233334 backedges. 1708 proven. 11918 refuted. 0 times theorem prover too weak. 219708 trivial. 0 not checked. [2020-07-21 10:42:58,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:43:05,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:06,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:08,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 233334 backedges. 1708 proven. 12010 refuted. 0 times theorem prover too weak. 219616 trivial. 0 not checked. [2020-07-21 10:43:11,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650274722] [2020-07-21 10:43:11,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:43:11,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 10:43:11,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208752514] [2020-07-21 10:43:11,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 10:43:11,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:43:11,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 10:43:11,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:43:11,068 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 23 states. [2020-07-21 10:43:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:43:11,508 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-21 10:43:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:43:11,508 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1950 [2020-07-21 10:43:11,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:43:11,516 INFO L225 Difference]: With dead ends: 102 [2020-07-21 10:43:11,516 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 10:43:11,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3909 GetRequests, 3861 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 10:43:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 10:43:11,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-21 10:43:11,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 10:43:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 10:43:11,531 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1950 [2020-07-21 10:43:11,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:43:11,534 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 10:43:11,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 10:43:11,534 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 10:43:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1690 [2020-07-21 10:43:11,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:43:11,558 INFO L422 BasicCegarLoop]: trace histogram [245, 245, 212, 122, 122, 122, 122, 122, 122, 122, 90, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:43:11,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:11,771 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:43:11,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:43:11,772 INFO L82 PathProgramCache]: Analyzing trace with hash 249367267, now seen corresponding path program 8 times [2020-07-21 10:43:11,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:43:11,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45398970] [2020-07-21 10:43:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:43:12,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 3748 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:43:12,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:43:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1545 proven. 10458 refuted. 0 times theorem prover too weak. 159447 trivial. 0 not checked. [2020-07-21 10:43:13,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:43:18,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:21,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:21,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:22,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:22,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:23,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:23,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:23,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:23,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:24,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:24,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1545 proven. 10558 refuted. 0 times theorem prover too weak. 159347 trivial. 0 not checked. [2020-07-21 10:43:25,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45398970] [2020-07-21 10:43:25,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:43:25,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 10:43:25,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466924307] [2020-07-21 10:43:25,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:43:25,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:43:25,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:43:25,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:43:25,153 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 22 states. [2020-07-21 10:43:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:43:25,622 INFO L93 Difference]: Finished difference Result 107 states and 432 transitions. [2020-07-21 10:43:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:43:25,623 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1689 [2020-07-21 10:43:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:43:25,630 INFO L225 Difference]: With dead ends: 107 [2020-07-21 10:43:25,630 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 10:43:25,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3386 GetRequests, 3338 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 10:43:25,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 10:43:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2020-07-21 10:43:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 10:43:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 10:43:25,647 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1689 [2020-07-21 10:43:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:43:25,648 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 10:43:25,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:43:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 10:43:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2939 [2020-07-21 10:43:25,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:43:25,717 INFO L422 BasicCegarLoop]: trace histogram [451, 451, 226, 225, 225, 225, 225, 225, 225, 225, 225, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:43:25,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:25,933 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:43:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:43:25,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1181276374, now seen corresponding path program 9 times [2020-07-21 10:43:25,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:43:25,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649378361] [2020-07-21 10:43:25,936 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 [2020-07-21 10:43:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:43:27,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 6555 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:43:27,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:43:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 531900 backedges. 2556 proven. 20592 refuted. 0 times theorem prover too weak. 508752 trivial. 0 not checked. [2020-07-21 10:43:29,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:43:40,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:44,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:46,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:47,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:47,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:48,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:48,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:48,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:48,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:49,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:49,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:49,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 531900 backedges. 2556 proven. 20709 refuted. 0 times theorem prover too weak. 508635 trivial. 0 not checked. [2020-07-21 10:43:52,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649378361] [2020-07-21 10:43:52,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:43:52,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 10:43:52,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157700614] [2020-07-21 10:43:52,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:43:52,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:43:52,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:43:52,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:43:52,096 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 24 states. [2020-07-21 10:43:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:43:52,847 INFO L93 Difference]: Finished difference Result 112 states and 474 transitions. [2020-07-21 10:43:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:43:52,849 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 2938 [2020-07-21 10:43:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:43:52,855 INFO L225 Difference]: With dead ends: 112 [2020-07-21 10:43:52,856 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 10:43:52,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5886 GetRequests, 5833 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 10:43:52,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 10:43:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-07-21 10:43:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 10:43:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-21 10:43:52,873 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 2938 [2020-07-21 10:43:52,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:43:52,875 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-21 10:43:52,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:43:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-21 10:43:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3043 [2020-07-21 10:43:52,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:43:52,928 INFO L422 BasicCegarLoop]: trace histogram [445, 445, 365, 222, 222, 222, 222, 222, 222, 222, 143, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:43:53,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:53,129 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:43:53,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:43:53,131 INFO L82 PathProgramCache]: Analyzing trace with hash 98701647, now seen corresponding path program 9 times [2020-07-21 10:43:53,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:43:53,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472453632] [2020-07-21 10:43:53,135 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 [2020-07-21 10:43:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:43:54,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 6754 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:43:54,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:43:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 559714 backedges. 3290 proven. 22033 refuted. 0 times theorem prover too weak. 534391 trivial. 0 not checked. [2020-07-21 10:43:57,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:44:08,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:13,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:13,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:15,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:16,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:17,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:17,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:18,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:18,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:18,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:18,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:18,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 559714 backedges. 3300 proven. 22140 refuted. 0 times theorem prover too weak. 534274 trivial. 0 not checked. [2020-07-21 10:44:21,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472453632] [2020-07-21 10:44:21,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:44:21,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 10:44:21,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992916386] [2020-07-21 10:44:21,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:44:21,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:21,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:44:21,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:44:21,285 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 24 states. [2020-07-21 10:44:21,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:21,984 INFO L93 Difference]: Finished difference Result 289 states and 3051 transitions. [2020-07-21 10:44:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:44:21,985 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 3042 [2020-07-21 10:44:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:21,996 INFO L225 Difference]: With dead ends: 289 [2020-07-21 10:44:21,996 INFO L226 Difference]: Without dead ends: 85 [2020-07-21 10:44:22,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6093 GetRequests, 6040 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 10:44:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-21 10:44:22,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-07-21 10:44:22,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 10:44:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 140 transitions. [2020-07-21 10:44:22,039 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 140 transitions. Word has length 3042 [2020-07-21 10:44:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:22,040 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 140 transitions. [2020-07-21 10:44:22,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:44:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 140 transitions. [2020-07-21 10:44:22,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1366 [2020-07-21 10:44:22,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:22,070 INFO L422 BasicCegarLoop]: trace histogram [197, 197, 176, 98, 98, 98, 98, 98, 98, 98, 78, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:22,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:22,286 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:22,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1651397559, now seen corresponding path program 10 times [2020-07-21 10:44:22,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:22,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239405816] [2020-07-21 10:44:22,288 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 [2020-07-21 10:44:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:22,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 3028 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:44:22,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 111636 backedges. 1525 proven. 8096 refuted. 0 times theorem prover too weak. 102015 trivial. 0 not checked. [2020-07-21 10:44:23,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:44:29,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:30,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:32,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:32,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:33,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:33,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:33,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:33,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:33,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:33,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:33,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:33,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:33,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:33,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 111636 backedges. 1549 proven. 8166 refuted. 0 times theorem prover too weak. 101921 trivial. 0 not checked. [2020-07-21 10:44:34,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239405816] [2020-07-21 10:44:34,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:44:34,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 10:44:34,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59971762] [2020-07-21 10:44:34,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:44:34,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:34,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:44:34,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:44:34,487 INFO L87 Difference]: Start difference. First operand 85 states and 140 transitions. Second operand 22 states. [2020-07-21 10:44:35,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:35,017 INFO L93 Difference]: Finished difference Result 294 states and 697 transitions. [2020-07-21 10:44:35,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:44:35,019 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1365 [2020-07-21 10:44:35,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:35,023 INFO L225 Difference]: With dead ends: 294 [2020-07-21 10:44:35,023 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 10:44:35,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2738 GetRequests, 2690 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 10:44:35,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 10:44:35,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-07-21 10:44:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 10:44:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 117 transitions. [2020-07-21 10:44:35,053 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 117 transitions. Word has length 1365 [2020-07-21 10:44:35,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:35,054 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 117 transitions. [2020-07-21 10:44:35,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:44:35,054 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 117 transitions. [2020-07-21 10:44:35,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2020-07-21 10:44:35,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:35,077 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:35,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:35,292 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:35,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:35,293 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 11 times [2020-07-21 10:44:35,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:35,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477059437] [2020-07-21 10:44:35,293 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 [2020-07-21 10:44:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:35,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 711 conjunts are in the unsatisfiable core [2020-07-21 10:44:36,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2020-07-21 10:44:37,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:45:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2020-07-21 10:45:01,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477059437] [2020-07-21 10:45:01,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:45:01,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 40 [2020-07-21 10:45:01,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270797036] [2020-07-21 10:45:01,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-21 10:45:01,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:45:01,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-21 10:45:01,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-07-21 10:45:01,761 INFO L87 Difference]: Start difference. First operand 82 states and 117 transitions. Second operand 40 states. [2020-07-21 10:45:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:45:02,924 INFO L93 Difference]: Finished difference Result 173 states and 302 transitions. [2020-07-21 10:45:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 10:45:02,928 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1212 [2020-07-21 10:45:02,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:45:02,934 INFO L225 Difference]: With dead ends: 173 [2020-07-21 10:45:02,934 INFO L226 Difference]: Without dead ends: 166 [2020-07-21 10:45:02,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2425 GetRequests, 2339 SyntacticMatches, 46 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=103, Invalid=1619, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 10:45:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-21 10:45:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 137. [2020-07-21 10:45:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-21 10:45:02,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 245 transitions. [2020-07-21 10:45:02,964 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 245 transitions. Word has length 1212 [2020-07-21 10:45:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:45:02,965 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 245 transitions. [2020-07-21 10:45:02,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-21 10:45:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 245 transitions. [2020-07-21 10:45:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1441 [2020-07-21 10:45:02,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:45:02,989 INFO L422 BasicCegarLoop]: trace histogram [213, 213, 155, 106, 106, 106, 106, 106, 106, 106, 58, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:45:03,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:45:03,202 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:45:03,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:45:03,203 INFO L82 PathProgramCache]: Analyzing trace with hash 771531875, now seen corresponding path program 12 times [2020-07-21 10:45:03,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:45:03,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001742870] [2020-07-21 10:45:03,204 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 [2020-07-21 10:45:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:45:04,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 3202 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:45:04,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:45:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 124507 backedges. 2134 proven. 9105 refuted. 0 times theorem prover too weak. 113268 trivial. 0 not checked. [2020-07-21 10:45:04,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:45:11,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:11,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:14,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:14,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:15,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:15,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:16,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:16,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:17,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:17,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:17,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:17,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:17,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:17,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:17,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:18,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 124507 backedges. 2142 proven. 9214 refuted. 0 times theorem prover too weak. 113151 trivial. 0 not checked. [2020-07-21 10:45:18,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001742870] [2020-07-21 10:45:18,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:45:18,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 10:45:18,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796903216] [2020-07-21 10:45:18,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:45:18,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:45:18,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:45:18,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:45:18,967 INFO L87 Difference]: Start difference. First operand 137 states and 245 transitions. Second operand 24 states. [2020-07-21 10:45:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:45:19,490 INFO L93 Difference]: Finished difference Result 221 states and 404 transitions. [2020-07-21 10:45:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:45:19,491 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1440 [2020-07-21 10:45:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:45:19,498 INFO L225 Difference]: With dead ends: 221 [2020-07-21 10:45:19,498 INFO L226 Difference]: Without dead ends: 174 [2020-07-21 10:45:19,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2889 GetRequests, 2836 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 10:45:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-07-21 10:45:19,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 147. [2020-07-21 10:45:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 10:45:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 269 transitions. [2020-07-21 10:45:19,536 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 269 transitions. Word has length 1440 [2020-07-21 10:45:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:45:19,537 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 269 transitions. [2020-07-21 10:45:19,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:45:19,537 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 269 transitions. [2020-07-21 10:45:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1365 [2020-07-21 10:45:19,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:45:19,560 INFO L422 BasicCegarLoop]: trace histogram [201, 201, 151, 100, 100, 100, 100, 100, 100, 100, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:45:19,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:45:19,775 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:45:19,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:45:19,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1607980889, now seen corresponding path program 13 times [2020-07-21 10:45:19,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:45:19,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301318219] [2020-07-21 10:45:19,777 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 [2020-07-21 10:45:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:45:20,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 3032 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:45:20,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:45:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 111525 backedges. 1637 proven. 8986 refuted. 0 times theorem prover too weak. 100902 trivial. 0 not checked. [2020-07-21 10:45:21,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:45:28,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:28,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:30,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:32,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:33,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:33,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:33,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:33,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:34,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:34,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:34,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:34,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:34,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:34,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:34,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 111525 backedges. 1649 proven. 9091 refuted. 0 times theorem prover too weak. 100785 trivial. 0 not checked. [2020-07-21 10:45:35,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301318219] [2020-07-21 10:45:35,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:45:35,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 10:45:35,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222891749] [2020-07-21 10:45:35,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:45:35,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:45:35,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:45:35,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:45:35,466 INFO L87 Difference]: Start difference. First operand 147 states and 269 transitions. Second operand 24 states. [2020-07-21 10:45:36,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:45:36,269 INFO L93 Difference]: Finished difference Result 411 states and 914 transitions. [2020-07-21 10:45:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:45:36,270 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1364 [2020-07-21 10:45:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:45:36,275 INFO L225 Difference]: With dead ends: 411 [2020-07-21 10:45:36,276 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 10:45:36,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2737 GetRequests, 2684 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 10:45:36,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 10:45:36,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2020-07-21 10:45:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-21 10:45:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 235 transitions. [2020-07-21 10:45:36,328 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 235 transitions. Word has length 1364 [2020-07-21 10:45:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:45:36,328 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 235 transitions. [2020-07-21 10:45:36,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:45:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 235 transitions. [2020-07-21 10:45:36,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1273 [2020-07-21 10:45:36,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:45:36,351 INFO L422 BasicCegarLoop]: trace histogram [187, 187, 143, 93, 93, 93, 93, 93, 93, 93, 50, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:45:36,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:45:36,566 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:45:36,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:45:36,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1717509864, now seen corresponding path program 14 times [2020-07-21 10:45:36,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:45:36,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132676049] [2020-07-21 10:45:36,569 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 [2020-07-21 10:45:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:45:37,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:45:37,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:45:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 96829 backedges. 1700 proven. 6548 refuted. 0 times theorem prover too weak. 88581 trivial. 0 not checked. [2020-07-21 10:45:38,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:45:44,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:46,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:47,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:48,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:48,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:48,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:48,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:48,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:48,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:49,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:49,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:49,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:49,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 96829 backedges. 1711 proven. 6609 refuted. 0 times theorem prover too weak. 88509 trivial. 0 not checked. [2020-07-21 10:45:49,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132676049] [2020-07-21 10:45:49,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:45:49,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 10:45:49,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675878153] [2020-07-21 10:45:49,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:45:49,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:45:49,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:45:49,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:45:49,935 INFO L87 Difference]: Start difference. First operand 141 states and 235 transitions. Second operand 22 states. [2020-07-21 10:45:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:45:50,305 INFO L93 Difference]: Finished difference Result 208 states and 347 transitions. [2020-07-21 10:45:50,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:45:50,306 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1272 [2020-07-21 10:45:50,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:45:50,310 INFO L225 Difference]: With dead ends: 208 [2020-07-21 10:45:50,310 INFO L226 Difference]: Without dead ends: 181 [2020-07-21 10:45:50,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2551 GetRequests, 2506 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:45:50,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-07-21 10:45:50,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 144. [2020-07-21 10:45:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-21 10:45:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 240 transitions. [2020-07-21 10:45:50,337 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 240 transitions. Word has length 1272 [2020-07-21 10:45:50,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:45:50,338 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 240 transitions. [2020-07-21 10:45:50,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:45:50,338 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 240 transitions. [2020-07-21 10:45:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1285 [2020-07-21 10:45:50,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:45:50,359 INFO L422 BasicCegarLoop]: trace histogram [189, 189, 143, 94, 94, 94, 94, 94, 94, 94, 49, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:45:50,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:45:50,576 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:45:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:45:50,577 INFO L82 PathProgramCache]: Analyzing trace with hash 982542539, now seen corresponding path program 15 times [2020-07-21 10:45:50,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:45:50,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255924652] [2020-07-21 10:45:50,578 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 [2020-07-21 10:45:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:45:51,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 2854 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 10:45:51,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:45:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 98701 backedges. 1680 proven. 7642 refuted. 0 times theorem prover too weak. 89379 trivial. 0 not checked. [2020-07-21 10:45:52,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:45:58,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:01,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:02,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:03,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:03,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:04,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:04,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:04,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:04,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:04,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:04,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:04,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 98701 backedges. 1682 proven. 7732 refuted. 0 times theorem prover too weak. 89287 trivial. 0 not checked. [2020-07-21 10:46:05,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255924652] [2020-07-21 10:46:05,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:46:05,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 10:46:05,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015961691] [2020-07-21 10:46:05,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:46:05,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:46:05,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:46:05,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:46:05,667 INFO L87 Difference]: Start difference. First operand 144 states and 240 transitions. Second operand 24 states. [2020-07-21 10:46:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:46:06,138 INFO L93 Difference]: Finished difference Result 185 states and 302 transitions. [2020-07-21 10:46:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:46:06,141 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1284 [2020-07-21 10:46:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:46:06,144 INFO L225 Difference]: With dead ends: 185 [2020-07-21 10:46:06,144 INFO L226 Difference]: Without dead ends: 153 [2020-07-21 10:46:06,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2576 GetRequests, 2526 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 10:46:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-21 10:46:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2020-07-21 10:46:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-21 10:46:06,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 233 transitions. [2020-07-21 10:46:06,168 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 233 transitions. Word has length 1284 [2020-07-21 10:46:06,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:46:06,169 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 233 transitions. [2020-07-21 10:46:06,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:46:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 233 transitions. [2020-07-21 10:46:06,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1309 [2020-07-21 10:46:06,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:46:06,189 INFO L422 BasicCegarLoop]: trace histogram [193, 193, 143, 96, 96, 96, 96, 96, 96, 96, 50, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:46:06,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:46:06,404 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:46:06,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:46:06,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1925921341, now seen corresponding path program 16 times [2020-07-21 10:46:06,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:46:06,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913836131] [2020-07-21 10:46:06,405 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 [2020-07-21 10:46:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:46:07,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 2908 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 10:46:07,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:46:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 102505 backedges. 1802 proven. 7700 refuted. 0 times theorem prover too weak. 93003 trivial. 0 not checked. [2020-07-21 10:46:08,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:46:14,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:14,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:17,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:17,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:18,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:18,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:19,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:20,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:20,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:20,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:20,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:20,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:21,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 102505 backedges. 1802 proven. 7792 refuted. 0 times theorem prover too weak. 92911 trivial. 0 not checked. [2020-07-21 10:46:22,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913836131] [2020-07-21 10:46:22,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:46:22,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 10:46:22,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302045322] [2020-07-21 10:46:22,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:46:22,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:46:22,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:46:22,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:46:22,496 INFO L87 Difference]: Start difference. First operand 141 states and 233 transitions. Second operand 24 states. [2020-07-21 10:46:23,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:46:23,007 INFO L93 Difference]: Finished difference Result 198 states and 321 transitions. [2020-07-21 10:46:23,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:46:23,008 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1308 [2020-07-21 10:46:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:46:23,012 INFO L225 Difference]: With dead ends: 198 [2020-07-21 10:46:23,013 INFO L226 Difference]: Without dead ends: 171 [2020-07-21 10:46:23,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2624 GetRequests, 2574 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 10:46:23,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-21 10:46:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 131. [2020-07-21 10:46:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 10:46:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 211 transitions. [2020-07-21 10:46:23,037 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 211 transitions. Word has length 1308 [2020-07-21 10:46:23,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:46:23,038 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 211 transitions. [2020-07-21 10:46:23,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:46:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 211 transitions. [2020-07-21 10:46:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1261 [2020-07-21 10:46:23,056 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:46:23,057 INFO L422 BasicCegarLoop]: trace histogram [185, 185, 143, 92, 92, 92, 92, 92, 92, 92, 51, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:46:23,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:46:23,271 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:46:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:46:23,272 INFO L82 PathProgramCache]: Analyzing trace with hash 131582231, now seen corresponding path program 17 times [2020-07-21 10:46:23,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:46:23,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629058398] [2020-07-21 10:46:23,273 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 [2020-07-21 10:46:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:46:24,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 2800 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 10:46:24,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:46:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 94977 backedges. 1488 proven. 7654 refuted. 0 times theorem prover too weak. 85835 trivial. 0 not checked. [2020-07-21 10:46:24,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:46:31,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:31,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:34,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:36,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:37,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:37,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:37,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:38,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:38,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:38,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:38,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:38,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:38,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:38,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 94977 backedges. 1492 proven. 7742 refuted. 0 times theorem prover too weak. 85743 trivial. 0 not checked. [2020-07-21 10:46:38,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629058398] [2020-07-21 10:46:38,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:46:38,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 10:46:38,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463355148] [2020-07-21 10:46:38,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:46:38,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:46:38,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:46:38,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:46:38,996 INFO L87 Difference]: Start difference. First operand 131 states and 211 transitions. Second operand 24 states. [2020-07-21 10:46:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:46:39,724 INFO L93 Difference]: Finished difference Result 332 states and 623 transitions. [2020-07-21 10:46:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:46:39,726 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1260 [2020-07-21 10:46:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:46:39,731 INFO L225 Difference]: With dead ends: 332 [2020-07-21 10:46:39,731 INFO L226 Difference]: Without dead ends: 131 [2020-07-21 10:46:39,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2528 GetRequests, 2478 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 10:46:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-21 10:46:39,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2020-07-21 10:46:39,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-21 10:46:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 190 transitions. [2020-07-21 10:46:39,761 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 190 transitions. Word has length 1260 [2020-07-21 10:46:39,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:46:39,761 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 190 transitions. [2020-07-21 10:46:39,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:46:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 190 transitions. [2020-07-21 10:46:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1216 [2020-07-21 10:46:39,789 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:46:39,790 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 146, 88, 88, 88, 88, 88, 88, 88, 58, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:46:40,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:46:40,004 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:46:40,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:46:40,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1006302399, now seen corresponding path program 18 times [2020-07-21 10:46:40,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:46:40,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916593541] [2020-07-21 10:46:40,005 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 [2020-07-21 10:46:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:46:40,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 2698 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:46:41,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:46:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 88201 backedges. 1942 proven. 6549 refuted. 0 times theorem prover too weak. 79710 trivial. 0 not checked. [2020-07-21 10:46:41,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:46:48,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:48,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:50,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:50,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:52,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:52,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:52,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:53,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:53,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:53,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:53,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:53,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:53,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:53,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:53,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:53,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:46:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 88201 backedges. 1960 proven. 6625 refuted. 0 times theorem prover too weak. 79616 trivial. 0 not checked. [2020-07-21 10:46:54,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916593541] [2020-07-21 10:46:54,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:46:54,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 10:46:54,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204302038] [2020-07-21 10:46:54,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:46:54,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:46:54,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:46:54,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:46:54,707 INFO L87 Difference]: Start difference. First operand 126 states and 190 transitions. Second operand 22 states. [2020-07-21 10:46:55,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:46:55,176 INFO L93 Difference]: Finished difference Result 192 states and 298 transitions. [2020-07-21 10:46:55,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:46:55,177 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1215 [2020-07-21 10:46:55,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:46:55,181 INFO L225 Difference]: With dead ends: 192 [2020-07-21 10:46:55,182 INFO L226 Difference]: Without dead ends: 170 [2020-07-21 10:46:55,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2438 GetRequests, 2390 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 10:46:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-21 10:46:55,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 146. [2020-07-21 10:46:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-21 10:46:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 227 transitions. [2020-07-21 10:46:55,207 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 227 transitions. Word has length 1215 [2020-07-21 10:46:55,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:46:55,208 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 227 transitions. [2020-07-21 10:46:55,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:46:55,208 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 227 transitions. [2020-07-21 10:46:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-21 10:46:55,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:46:55,225 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:46:55,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:46:55,439 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:46:55,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:46:55,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1729351266, now seen corresponding path program 19 times [2020-07-21 10:46:55,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:46:55,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020894995] [2020-07-21 10:46:55,441 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 [2020-07-21 10:46:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:46:56,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 10:46:56,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:46:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 3639 proven. 3332 refuted. 0 times theorem prover too weak. 82570 trivial. 0 not checked. [2020-07-21 10:46:57,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:47:02,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:02,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:03,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:03,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:04,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:04,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:04,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:04,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:04,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:04,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:04,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:04,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:05,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:06,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 3643 proven. 3385 refuted. 0 times theorem prover too weak. 82513 trivial. 0 not checked. [2020-07-21 10:47:08,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020894995] [2020-07-21 10:47:08,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:47:08,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 10:47:08,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24745951] [2020-07-21 10:47:08,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:47:08,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:47:08,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:47:08,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:47:08,243 INFO L87 Difference]: Start difference. First operand 146 states and 227 transitions. Second operand 20 states. [2020-07-21 10:47:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:47:08,735 INFO L93 Difference]: Finished difference Result 241 states and 379 transitions. [2020-07-21 10:47:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:47:08,737 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 1224 [2020-07-21 10:47:08,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:47:08,744 INFO L225 Difference]: With dead ends: 241 [2020-07-21 10:47:08,745 INFO L226 Difference]: Without dead ends: 224 [2020-07-21 10:47:08,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2454 GetRequests, 2414 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:47:08,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-07-21 10:47:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 178. [2020-07-21 10:47:08,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-07-21 10:47:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 281 transitions. [2020-07-21 10:47:08,794 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 281 transitions. Word has length 1224 [2020-07-21 10:47:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:47:08,794 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 281 transitions. [2020-07-21 10:47:08,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:47:08,795 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 281 transitions. [2020-07-21 10:47:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1214 [2020-07-21 10:47:08,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:47:08,828 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 144, 88, 88, 88, 88, 88, 88, 88, 56, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:47:09,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:47:09,043 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:47:09,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:47:09,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2112356281, now seen corresponding path program 20 times [2020-07-21 10:47:09,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:47:09,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558505594] [2020-07-21 10:47:09,045 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 [2020-07-21 10:47:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:47:10,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 2694 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:47:10,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:47:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 87912 backedges. 6437 proven. 1095 refuted. 0 times theorem prover too weak. 80380 trivial. 0 not checked. [2020-07-21 10:47:10,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:47:14,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:15,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:16,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:16,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:16,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:16,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:16,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:16,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:17,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:17,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:17,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:17,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:19,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 87912 backedges. 6445 proven. 1163 refuted. 0 times theorem prover too weak. 80304 trivial. 0 not checked. [2020-07-21 10:47:22,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558505594] [2020-07-21 10:47:22,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:47:22,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 10:47:22,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007838206] [2020-07-21 10:47:22,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:47:22,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:47:22,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:47:22,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:47:22,921 INFO L87 Difference]: Start difference. First operand 178 states and 281 transitions. Second operand 20 states. [2020-07-21 10:47:23,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:47:23,419 INFO L93 Difference]: Finished difference Result 237 states and 371 transitions. [2020-07-21 10:47:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:47:23,420 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 1213 [2020-07-21 10:47:23,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:47:23,426 INFO L225 Difference]: With dead ends: 237 [2020-07-21 10:47:23,427 INFO L226 Difference]: Without dead ends: 230 [2020-07-21 10:47:23,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2433 GetRequests, 2390 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 10:47:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-21 10:47:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 186. [2020-07-21 10:47:23,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-07-21 10:47:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 292 transitions. [2020-07-21 10:47:23,461 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 292 transitions. Word has length 1213 [2020-07-21 10:47:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:47:23,462 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 292 transitions. [2020-07-21 10:47:23,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:47:23,462 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 292 transitions. [2020-07-21 10:47:23,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1263 [2020-07-21 10:47:23,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:47:23,483 INFO L422 BasicCegarLoop]: trace histogram [185, 185, 145, 92, 92, 92, 92, 92, 92, 92, 53, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:47:23,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:47:23,699 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:47:23,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:47:23,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1708103779, now seen corresponding path program 21 times [2020-07-21 10:47:23,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:47:23,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780715959] [2020-07-21 10:47:23,701 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 [2020-07-21 10:47:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:47:24,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 2804 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:47:24,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:47:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 95264 backedges. 2033 proven. 6793 refuted. 0 times theorem prover too weak. 86438 trivial. 0 not checked. [2020-07-21 10:47:25,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:47:32,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:32,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:35,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:35,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:37,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:37,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:38,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:38,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:38,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:38,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:38,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:38,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:38,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:38,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:38,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 95264 backedges. 2049 proven. 6871 refuted. 0 times theorem prover too weak. 86344 trivial. 0 not checked. [2020-07-21 10:47:40,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780715959] [2020-07-21 10:47:40,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:47:40,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 10:47:40,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769760036] [2020-07-21 10:47:40,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:47:40,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:47:40,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:47:40,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:47:40,115 INFO L87 Difference]: Start difference. First operand 186 states and 292 transitions. Second operand 22 states. [2020-07-21 10:47:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:47:40,667 INFO L93 Difference]: Finished difference Result 278 states and 438 transitions. [2020-07-21 10:47:40,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:47:40,668 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1262 [2020-07-21 10:47:40,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:47:40,675 INFO L225 Difference]: With dead ends: 278 [2020-07-21 10:47:40,675 INFO L226 Difference]: Without dead ends: 238 [2020-07-21 10:47:40,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2532 GetRequests, 2484 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 10:47:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-21 10:47:40,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 196. [2020-07-21 10:47:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-21 10:47:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 309 transitions. [2020-07-21 10:47:40,712 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 309 transitions. Word has length 1262 [2020-07-21 10:47:40,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:47:40,713 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 309 transitions. [2020-07-21 10:47:40,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:47:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 309 transitions. [2020-07-21 10:47:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1262 [2020-07-21 10:47:40,735 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:47:40,735 INFO L422 BasicCegarLoop]: trace histogram [185, 185, 144, 92, 92, 92, 92, 92, 92, 92, 52, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:47:40,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:47:40,949 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:47:40,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:47:40,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1965241893, now seen corresponding path program 22 times [2020-07-21 10:47:40,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:47:40,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123950767] [2020-07-21 10:47:40,951 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 [2020-07-21 10:47:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:47:42,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 2802 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:47:42,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:47:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 95120 backedges. 3895 proven. 4922 refuted. 0 times theorem prover too weak. 86303 trivial. 0 not checked. [2020-07-21 10:47:42,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:47:50,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:50,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:51,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:51,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:53,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:53,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:53,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:54,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:54,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:54,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:54,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:54,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:54,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:54,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:55,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:47:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 95120 backedges. 3909 proven. 5002 refuted. 0 times theorem prover too weak. 86209 trivial. 0 not checked. [2020-07-21 10:47:58,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123950767] [2020-07-21 10:47:58,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:47:58,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 10:47:58,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076639473] [2020-07-21 10:47:58,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:47:58,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:47:58,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:47:58,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:47:58,091 INFO L87 Difference]: Start difference. First operand 196 states and 309 transitions. Second operand 22 states. [2020-07-21 10:47:58,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:47:58,658 INFO L93 Difference]: Finished difference Result 289 states and 452 transitions. [2020-07-21 10:47:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:47:58,660 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1261 [2020-07-21 10:47:58,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:47:58,669 INFO L225 Difference]: With dead ends: 289 [2020-07-21 10:47:58,669 INFO L226 Difference]: Without dead ends: 269 [2020-07-21 10:47:58,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2530 GetRequests, 2482 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 10:47:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-07-21 10:47:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 221. [2020-07-21 10:47:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 10:47:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 351 transitions. [2020-07-21 10:47:58,714 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 351 transitions. Word has length 1261 [2020-07-21 10:47:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:47:58,715 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 351 transitions. [2020-07-21 10:47:58,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:47:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 351 transitions. [2020-07-21 10:47:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1238 [2020-07-21 10:47:58,741 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:47:58,742 INFO L422 BasicCegarLoop]: trace histogram [181, 181, 144, 90, 90, 90, 90, 90, 90, 90, 54, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:47:58,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:47:58,956 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:47:58,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:47:58,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1956505307, now seen corresponding path program 23 times [2020-07-21 10:47:58,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:47:58,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616659662] [2020-07-21 10:47:58,958 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 [2020-07-21 10:48:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:48:00,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 2748 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:48:00,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:48:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 91476 backedges. 2580 proven. 6065 refuted. 0 times theorem prover too weak. 82831 trivial. 0 not checked. [2020-07-21 10:48:00,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:48:08,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:08,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:11,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:11,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:12,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:12,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:13,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:13,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:13,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:14,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:14,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:14,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:14,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:14,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:14,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:14,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 91476 backedges. 2596 proven. 6143 refuted. 0 times theorem prover too weak. 82737 trivial. 0 not checked. [2020-07-21 10:48:16,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616659662] [2020-07-21 10:48:16,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:48:16,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 10:48:16,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280158295] [2020-07-21 10:48:16,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:48:16,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:48:16,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:48:16,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:48:16,562 INFO L87 Difference]: Start difference. First operand 221 states and 351 transitions. Second operand 22 states. [2020-07-21 10:48:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:48:17,132 INFO L93 Difference]: Finished difference Result 259 states and 404 transitions. [2020-07-21 10:48:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:48:17,134 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1237 [2020-07-21 10:48:17,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:48:17,140 INFO L225 Difference]: With dead ends: 259 [2020-07-21 10:48:17,140 INFO L226 Difference]: Without dead ends: 242 [2020-07-21 10:48:17,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2482 GetRequests, 2434 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 10:48:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-21 10:48:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 195. [2020-07-21 10:48:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-07-21 10:48:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 309 transitions. [2020-07-21 10:48:17,174 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 309 transitions. Word has length 1237 [2020-07-21 10:48:17,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:48:17,175 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 309 transitions. [2020-07-21 10:48:17,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:48:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 309 transitions. [2020-07-21 10:48:17,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1249 [2020-07-21 10:48:17,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:48:17,196 INFO L422 BasicCegarLoop]: trace histogram [183, 183, 143, 91, 91, 91, 91, 91, 91, 91, 52, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:48:17,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:48:17,412 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:48:17,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:48:17,413 INFO L82 PathProgramCache]: Analyzing trace with hash 953975490, now seen corresponding path program 24 times [2020-07-21 10:48:17,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:48:17,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096844686] [2020-07-21 10:48:17,414 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 [2020-07-21 10:48:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:48:18,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 2773 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:48:18,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:48:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 93145 backedges. 1929 proven. 6159 refuted. 0 times theorem prover too weak. 85057 trivial. 0 not checked. [2020-07-21 10:48:19,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:48:22,202 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 10:48:27,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:27,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:30,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:30,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:32,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:32,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:33,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:33,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:33,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:33,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:34,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:34,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:34,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:34,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:34,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:34,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 93145 backedges. 1938 proven. 6222 refuted. 0 times theorem prover too weak. 84985 trivial. 0 not checked. [2020-07-21 10:48:35,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096844686] [2020-07-21 10:48:35,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:48:35,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 10:48:35,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571875795] [2020-07-21 10:48:35,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:48:35,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:48:35,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:48:35,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:48:35,584 INFO L87 Difference]: Start difference. First operand 195 states and 309 transitions. Second operand 22 states. [2020-07-21 10:48:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:48:36,143 INFO L93 Difference]: Finished difference Result 259 states and 406 transitions. [2020-07-21 10:48:36,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:48:36,145 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1248 [2020-07-21 10:48:36,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:48:36,151 INFO L225 Difference]: With dead ends: 259 [2020-07-21 10:48:36,151 INFO L226 Difference]: Without dead ends: 237 [2020-07-21 10:48:36,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2503 GetRequests, 2458 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:48:36,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-07-21 10:48:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 182. [2020-07-21 10:48:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-21 10:48:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 284 transitions. [2020-07-21 10:48:36,182 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 284 transitions. Word has length 1248 [2020-07-21 10:48:36,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:48:36,182 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 284 transitions. [2020-07-21 10:48:36,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:48:36,183 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 284 transitions. [2020-07-21 10:48:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1261 [2020-07-21 10:48:36,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:48:36,194 INFO L422 BasicCegarLoop]: trace histogram [185, 185, 143, 92, 92, 92, 92, 92, 92, 92, 51, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:48:36,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:48:36,395 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:48:36,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:48:36,396 INFO L82 PathProgramCache]: Analyzing trace with hash -54307581, now seen corresponding path program 25 times [2020-07-21 10:48:36,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:48:36,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588733856] [2020-07-21 10:48:36,397 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 [2020-07-21 10:48:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:48:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 2800 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 10:48:37,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:48:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 94977 backedges. 2093 proven. 7049 refuted. 0 times theorem prover too weak. 85835 trivial. 0 not checked. [2020-07-21 10:48:38,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:48:41,775 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-07-21 10:48:47,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:47,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:51,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:51,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:53,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:53,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:54,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:54,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:54,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:55,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:55,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:55,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:55,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:55,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:55,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:56,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:48:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 94977 backedges. 2091 proven. 7143 refuted. 0 times theorem prover too weak. 85743 trivial. 0 not checked. [2020-07-21 10:48:57,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588733856] [2020-07-21 10:48:57,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:48:57,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 10:48:57,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567097306] [2020-07-21 10:48:57,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:48:57,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:48:57,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:48:57,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:48:57,296 INFO L87 Difference]: Start difference. First operand 182 states and 284 transitions. Second operand 24 states. [2020-07-21 10:48:58,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:48:58,059 INFO L93 Difference]: Finished difference Result 326 states and 508 transitions. [2020-07-21 10:48:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:48:58,061 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1260 [2020-07-21 10:48:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:48:58,069 INFO L225 Difference]: With dead ends: 326 [2020-07-21 10:48:58,069 INFO L226 Difference]: Without dead ends: 286 [2020-07-21 10:48:58,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2528 GetRequests, 2478 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 10:48:58,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-07-21 10:48:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 161. [2020-07-21 10:48:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-21 10:48:58,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 247 transitions. [2020-07-21 10:48:58,104 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 247 transitions. Word has length 1260 [2020-07-21 10:48:58,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:48:58,105 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 247 transitions. [2020-07-21 10:48:58,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:48:58,105 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 247 transitions. [2020-07-21 10:48:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1238 [2020-07-21 10:48:58,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:48:58,122 INFO L422 BasicCegarLoop]: trace histogram [181, 181, 144, 90, 90, 90, 90, 90, 90, 90, 54, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:48:58,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:48:58,338 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:48:58,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:48:58,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1962060619, now seen corresponding path program 26 times [2020-07-21 10:48:58,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:48:58,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359833315] [2020-07-21 10:48:58,340 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 [2020-07-21 10:48:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:48:59,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 2748 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:48:59,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:49:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 91476 backedges. 5944 proven. 2701 refuted. 0 times theorem prover too weak. 82831 trivial. 0 not checked. [2020-07-21 10:49:00,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:49:06,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:06,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:08,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:10,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:10,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:11,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:11,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:11,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:11,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:11,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:12,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:12,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:13,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 91476 backedges. 5956 proven. 2783 refuted. 0 times theorem prover too weak. 82737 trivial. 0 not checked. [2020-07-21 10:49:18,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359833315] [2020-07-21 10:49:18,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:49:18,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 10:49:18,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801822916] [2020-07-21 10:49:18,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:49:18,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:49:18,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:49:18,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:49:18,298 INFO L87 Difference]: Start difference. First operand 161 states and 247 transitions. Second operand 22 states. [2020-07-21 10:49:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:49:18,990 INFO L93 Difference]: Finished difference Result 266 states and 409 transitions. [2020-07-21 10:49:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:49:18,993 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1237 [2020-07-21 10:49:18,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:49:18,999 INFO L225 Difference]: With dead ends: 266 [2020-07-21 10:49:18,999 INFO L226 Difference]: Without dead ends: 259 [2020-07-21 10:49:19,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2482 GetRequests, 2434 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 10:49:19,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-07-21 10:49:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 166. [2020-07-21 10:49:19,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-21 10:49:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 254 transitions. [2020-07-21 10:49:19,029 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 254 transitions. Word has length 1237 [2020-07-21 10:49:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:49:19,030 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 254 transitions. [2020-07-21 10:49:19,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:49:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 254 transitions. [2020-07-21 10:49:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1237 [2020-07-21 10:49:19,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:49:19,047 INFO L422 BasicCegarLoop]: trace histogram [181, 181, 143, 90, 90, 90, 90, 90, 90, 90, 53, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:49:19,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:49:19,261 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:49:19,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:49:19,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1429871315, now seen corresponding path program 27 times [2020-07-21 10:49:19,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:49:19,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078889302] [2020-07-21 10:49:19,262 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 [2020-07-21 10:49:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:49:20,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 2746 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:49:20,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:49:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 91333 backedges. 3540 proven. 4468 refuted. 0 times theorem prover too weak. 83325 trivial. 0 not checked. [2020-07-21 10:49:21,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:49:29,820 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 10:49:29,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:29,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:31,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:31,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:32,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:32,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:33,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:33,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:33,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:33,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:34,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:34,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:34,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:34,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:34,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:35,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 91333 backedges. 3545 proven. 4535 refuted. 0 times theorem prover too weak. 83253 trivial. 0 not checked. [2020-07-21 10:49:38,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078889302] [2020-07-21 10:49:38,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:49:38,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 10:49:38,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347929647] [2020-07-21 10:49:38,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:49:38,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:49:38,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:49:38,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:49:38,310 INFO L87 Difference]: Start difference. First operand 166 states and 254 transitions. Second operand 22 states. [2020-07-21 10:49:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:49:38,941 INFO L93 Difference]: Finished difference Result 322 states and 498 transitions. [2020-07-21 10:49:38,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:49:38,943 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1236 [2020-07-21 10:49:38,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:49:38,953 INFO L225 Difference]: With dead ends: 322 [2020-07-21 10:49:38,954 INFO L226 Difference]: Without dead ends: 305 [2020-07-21 10:49:38,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2479 GetRequests, 2434 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:49:38,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-07-21 10:49:38,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 212. [2020-07-21 10:49:38,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-21 10:49:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 328 transitions. [2020-07-21 10:49:39,000 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 328 transitions. Word has length 1236 [2020-07-21 10:49:39,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:49:39,000 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 328 transitions. [2020-07-21 10:49:39,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:49:39,001 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 328 transitions. [2020-07-21 10:49:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-21 10:49:39,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:49:39,022 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:49:39,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:49:39,237 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:49:39,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:49:39,238 INFO L82 PathProgramCache]: Analyzing trace with hash -577703700, now seen corresponding path program 28 times [2020-07-21 10:49:39,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:49:39,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334230769] [2020-07-21 10:49:39,239 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 [2020-07-21 10:49:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:49:40,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:49:40,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:49:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 2472 proven. 5456 refuted. 0 times theorem prover too weak. 81613 trivial. 0 not checked. [2020-07-21 10:49:41,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:49:44,538 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-07-21 10:49:50,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:53,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:53,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:54,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:55,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:56,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:56,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:56,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:56,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:56,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:56,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:57,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:49:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 2479 proven. 5521 refuted. 0 times theorem prover too weak. 81541 trivial. 0 not checked. [2020-07-21 10:49:59,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334230769] [2020-07-21 10:49:59,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:49:59,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 10:49:59,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273383279] [2020-07-21 10:49:59,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:49:59,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:49:59,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:49:59,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:49:59,173 INFO L87 Difference]: Start difference. First operand 212 states and 328 transitions. Second operand 22 states. [2020-07-21 10:49:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:49:59,820 INFO L93 Difference]: Finished difference Result 307 states and 474 transitions. [2020-07-21 10:49:59,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:49:59,822 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1224 [2020-07-21 10:49:59,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:49:59,827 INFO L225 Difference]: With dead ends: 307 [2020-07-21 10:49:59,828 INFO L226 Difference]: Without dead ends: 277 [2020-07-21 10:49:59,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2455 GetRequests, 2410 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:49:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-07-21 10:49:59,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 212. [2020-07-21 10:49:59,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-21 10:49:59,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 322 transitions. [2020-07-21 10:49:59,865 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 322 transitions. Word has length 1224 [2020-07-21 10:49:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:49:59,866 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 322 transitions. [2020-07-21 10:49:59,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:49:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 322 transitions. [2020-07-21 10:49:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1237 [2020-07-21 10:49:59,884 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:49:59,885 INFO L422 BasicCegarLoop]: trace histogram [181, 181, 143, 90, 90, 90, 90, 90, 90, 90, 53, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:50:00,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:50:00,099 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:50:00,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:50:00,100 INFO L82 PathProgramCache]: Analyzing trace with hash 508300481, now seen corresponding path program 29 times [2020-07-21 10:50:00,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:50:00,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206251420] [2020-07-21 10:50:00,100 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 [2020-07-21 10:50:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:50:01,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 2746 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 10:50:01,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:50:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 91333 backedges. 2722 proven. 6240 refuted. 0 times theorem prover too weak. 82371 trivial. 0 not checked. [2020-07-21 10:50:02,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:50:12,623 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-07-21 10:50:12,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:12,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:16,798 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-07-21 10:50:16,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:16,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:18,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:18,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:19,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:20,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:20,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:20,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:20,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:20,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:20,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:20,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:21,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 91333 backedges. 2718 proven. 6336 refuted. 0 times theorem prover too weak. 82279 trivial. 0 not checked. [2020-07-21 10:50:23,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206251420] [2020-07-21 10:50:23,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:50:23,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 10:50:23,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291890918] [2020-07-21 10:50:23,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:50:23,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:50:23,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:50:23,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:50:23,361 INFO L87 Difference]: Start difference. First operand 212 states and 322 transitions. Second operand 24 states. [2020-07-21 10:50:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:50:24,244 INFO L93 Difference]: Finished difference Result 426 states and 657 transitions. [2020-07-21 10:50:24,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:50:24,246 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1236 [2020-07-21 10:50:24,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:50:24,259 INFO L225 Difference]: With dead ends: 426 [2020-07-21 10:50:24,259 INFO L226 Difference]: Without dead ends: 396 [2020-07-21 10:50:24,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2480 GetRequests, 2430 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 10:50:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-07-21 10:50:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 217. [2020-07-21 10:50:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-07-21 10:50:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 325 transitions. [2020-07-21 10:50:24,311 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 325 transitions. Word has length 1236 [2020-07-21 10:50:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:50:24,311 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 325 transitions. [2020-07-21 10:50:24,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:50:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 325 transitions. [2020-07-21 10:50:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-21 10:50:24,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:50:24,331 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:50:24,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:50:24,637 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:50:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:50:24,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1018676894, now seen corresponding path program 30 times [2020-07-21 10:50:24,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:50:24,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375690983] [2020-07-21 10:50:24,639 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 [2020-07-21 10:50:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:50:26,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:50:26,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:50:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 5501 proven. 2427 refuted. 0 times theorem prover too weak. 81613 trivial. 0 not checked. [2020-07-21 10:50:26,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:50:29,562 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 10:50:32,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:35,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:35,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:36,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:36,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:37,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:38,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:38,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:38,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:38,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:38,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:38,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:38,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:40,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:50:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 5504 proven. 2496 refuted. 0 times theorem prover too weak. 81541 trivial. 0 not checked. [2020-07-21 10:50:46,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375690983] [2020-07-21 10:50:46,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:50:46,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 10:50:46,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895419079] [2020-07-21 10:50:46,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:50:46,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:50:46,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:50:46,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:50:46,005 INFO L87 Difference]: Start difference. First operand 217 states and 325 transitions. Second operand 22 states. [2020-07-21 10:50:46,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:50:46,713 INFO L93 Difference]: Finished difference Result 360 states and 542 transitions. [2020-07-21 10:50:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:50:46,716 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1224 [2020-07-21 10:50:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:50:46,724 INFO L225 Difference]: With dead ends: 360 [2020-07-21 10:50:46,724 INFO L226 Difference]: Without dead ends: 353 [2020-07-21 10:50:46,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2455 GetRequests, 2410 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:50:46,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-07-21 10:50:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 199. [2020-07-21 10:50:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-21 10:50:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 297 transitions. [2020-07-21 10:50:46,763 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 297 transitions. Word has length 1224 [2020-07-21 10:50:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:50:46,764 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 297 transitions. [2020-07-21 10:50:46,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:50:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 297 transitions. [2020-07-21 10:50:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1237 [2020-07-21 10:50:46,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:50:46,781 INFO L422 BasicCegarLoop]: trace histogram [181, 181, 143, 90, 90, 90, 90, 90, 90, 90, 53, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:50:46,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:50:46,982 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:50:46,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:50:46,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1471712557, now seen corresponding path program 31 times [2020-07-21 10:50:46,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:50:46,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169325469] [2020-07-21 10:50:46,984 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 [2020-07-21 10:50:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:50:48,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 2746 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 10:50:48,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:50:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 91333 backedges. 3936 proven. 5026 refuted. 0 times theorem prover too weak. 82371 trivial. 0 not checked. [2020-07-21 10:50:49,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:50:52,967 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 10:51:00,751 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-07-21 10:51:01,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:03,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:03,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:05,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:06,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:07,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:07,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:07,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:07,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:08,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:08,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:08,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:08,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:09,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 91333 backedges. 3930 proven. 5124 refuted. 0 times theorem prover too weak. 82279 trivial. 0 not checked. [2020-07-21 10:51:13,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169325469] [2020-07-21 10:51:13,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:51:13,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 10:51:13,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782485984] [2020-07-21 10:51:13,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:51:13,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:51:13,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:51:13,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:51:13,133 INFO L87 Difference]: Start difference. First operand 199 states and 297 transitions. Second operand 24 states. [2020-07-21 10:51:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:51:14,139 INFO L93 Difference]: Finished difference Result 463 states and 710 transitions. [2020-07-21 10:51:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:51:14,142 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1236 [2020-07-21 10:51:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:51:14,157 INFO L225 Difference]: With dead ends: 463 [2020-07-21 10:51:14,158 INFO L226 Difference]: Without dead ends: 446 [2020-07-21 10:51:14,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2480 GetRequests, 2430 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 10:51:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-07-21 10:51:14,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 204. [2020-07-21 10:51:14,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 10:51:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 301 transitions. [2020-07-21 10:51:14,207 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 301 transitions. Word has length 1236 [2020-07-21 10:51:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:51:14,208 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 301 transitions. [2020-07-21 10:51:14,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:51:14,208 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 301 transitions. [2020-07-21 10:51:14,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-21 10:51:14,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:51:14,228 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:51:14,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:51:14,442 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:51:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:51:14,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1991897758, now seen corresponding path program 32 times [2020-07-21 10:51:14,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:51:14,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382355760] [2020-07-21 10:51:14,444 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 [2020-07-21 10:51:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:51:15,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 10:51:15,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:51:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 6141 proven. 2731 refuted. 0 times theorem prover too weak. 80669 trivial. 0 not checked. [2020-07-21 10:51:16,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:51:24,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:24,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:27,191 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 10:51:27,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:27,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:30,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:32,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:32,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:33,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:33,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:34,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:34,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:34,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:34,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:36,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:51:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 6133 proven. 2831 refuted. 0 times theorem prover too weak. 80577 trivial. 0 not checked. [2020-07-21 10:51:45,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382355760] [2020-07-21 10:51:45,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:51:45,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 10:51:45,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52873705] [2020-07-21 10:51:45,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:51:45,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:51:45,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:51:45,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:51:45,879 INFO L87 Difference]: Start difference. First operand 204 states and 301 transitions. Second operand 24 states. [2020-07-21 10:51:47,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:51:47,043 INFO L93 Difference]: Finished difference Result 565 states and 863 transitions. [2020-07-21 10:51:47,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:51:47,047 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1224 [2020-07-21 10:51:47,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:51:47,065 INFO L225 Difference]: With dead ends: 565 [2020-07-21 10:51:47,065 INFO L226 Difference]: Without dead ends: 467 [2020-07-21 10:51:47,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2456 GetRequests, 2406 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 10:51:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-07-21 10:51:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 111. [2020-07-21 10:51:47,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-21 10:51:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2020-07-21 10:51:47,118 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 161 transitions. Word has length 1224 [2020-07-21 10:51:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:51:47,119 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 161 transitions. [2020-07-21 10:51:47,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:51:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 161 transitions. [2020-07-21 10:51:47,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1214 [2020-07-21 10:51:47,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:51:47,134 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 144, 88, 88, 88, 88, 88, 88, 88, 56, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:51:47,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:51:47,348 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:51:47,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:51:47,349 INFO L82 PathProgramCache]: Analyzing trace with hash -666509037, now seen corresponding path program 33 times [2020-07-21 10:51:47,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:51:47,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519431495] [2020-07-21 10:51:47,350 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 [2020-07-21 10:51:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:51:48,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 2694 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:51:48,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:51:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 87912 backedges. 1350 proven. 8051 refuted. 0 times theorem prover too weak. 78511 trivial. 0 not checked. [2020-07-21 10:51:49,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:51:53,098 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 10:51:53,314 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 10:51:53,431 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 10:51:53,536 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 10:51:53,643 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 10:51:53,747 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 10:52:01,589 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 10:52:01,694 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 10:52:02,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:07,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:10,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:10,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:13,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:13,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:14,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:14,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:15,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:15,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:15,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:15,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:15,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:16,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:16,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 87912 backedges. 1366 proven. 8152 refuted. 0 times theorem prover too weak. 78394 trivial. 0 not checked. [2020-07-21 10:52:16,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519431495] [2020-07-21 10:52:16,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:52:16,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 10:52:16,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580926764] [2020-07-21 10:52:16,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:52:16,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:52:16,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:52:16,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:52:16,632 INFO L87 Difference]: Start difference. First operand 111 states and 161 transitions. Second operand 24 states. [2020-07-21 10:52:17,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:52:17,995 INFO L93 Difference]: Finished difference Result 324 states and 482 transitions. [2020-07-21 10:52:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:52:18,000 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1213 [2020-07-21 10:52:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:52:18,006 INFO L225 Difference]: With dead ends: 324 [2020-07-21 10:52:18,006 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 10:52:18,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2435 GetRequests, 2382 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 10:52:18,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 10:52:18,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-21 10:52:18,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 10:52:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 132 transitions. [2020-07-21 10:52:18,023 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 132 transitions. Word has length 1213 [2020-07-21 10:52:18,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:52:18,023 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 132 transitions. [2020-07-21 10:52:18,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:52:18,023 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 132 transitions. [2020-07-21 10:52:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-21 10:52:18,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:52:18,033 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:52:18,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:52:18,234 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:52:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:52:18,235 INFO L82 PathProgramCache]: Analyzing trace with hash 221687074, now seen corresponding path program 34 times [2020-07-21 10:52:18,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:52:18,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050222476] [2020-07-21 10:52:18,236 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 [2020-07-21 10:52:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:52:19,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 10:52:19,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:52:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 1425 proven. 7447 refuted. 0 times theorem prover too weak. 80669 trivial. 0 not checked. [2020-07-21 10:52:20,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:52:23,951 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 10:52:24,887 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 10:52:24,996 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 10:52:25,111 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 10:52:25,225 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 10:52:25,333 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 10:52:25,968 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-07-21 10:52:33,625 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 10:52:33,728 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 10:52:34,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:34,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:39,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:42,765 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-07-21 10:52:42,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:44,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:46,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:46,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:46,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:46,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:47,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:47,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:47,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:47,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:47,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:52:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 1431 proven. 7533 refuted. 0 times theorem prover too weak. 80577 trivial. 0 not checked. [2020-07-21 10:52:48,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050222476] [2020-07-21 10:52:48,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:52:48,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 10:52:48,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333051430] [2020-07-21 10:52:48,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:52:48,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:52:48,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:52:48,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:52:48,396 INFO L87 Difference]: Start difference. First operand 108 states and 132 transitions. Second operand 24 states. [2020-07-21 10:52:49,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:52:49,489 INFO L93 Difference]: Finished difference Result 150 states and 180 transitions. [2020-07-21 10:52:49,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:52:49,493 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1224 [2020-07-21 10:52:49,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:52:49,497 INFO L225 Difference]: With dead ends: 150 [2020-07-21 10:52:49,497 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 10:52:49,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2456 GetRequests, 2406 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 10:52:49,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 10:52:49,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-07-21 10:52:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-21 10:52:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2020-07-21 10:52:49,508 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 1224 [2020-07-21 10:52:49,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:52:49,508 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2020-07-21 10:52:49,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:52:49,508 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2020-07-21 10:52:49,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2020-07-21 10:52:49,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:52:49,518 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 143, 89, 89, 89, 89, 89, 89, 89, 54, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:52:49,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:52:49,719 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:52:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:52:49,720 INFO L82 PathProgramCache]: Analyzing trace with hash -69238494, now seen corresponding path program 35 times [2020-07-21 10:52:49,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:52:49,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808755803] [2020-07-21 10:52:49,721 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 [2020-07-21 10:52:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:52:51,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 10:52:51,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:52:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 1438 proven. 8365 refuted. 0 times theorem prover too weak. 79738 trivial. 0 not checked. [2020-07-21 10:52:52,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:52:55,552 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 10:52:55,663 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 10:52:55,786 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 10:52:55,902 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 10:52:56,891 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 10:52:57,021 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 10:52:57,161 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 10:52:57,298 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 10:52:57,433 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 10:52:57,557 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 10:52:57,669 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 10:52:57,772 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 10:52:58,331 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 10:53:05,770 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 10:53:05,878 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 10:53:05,986 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 10:53:06,628 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 10:53:06,743 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 10:53:06,868 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 10:53:06,989 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 10:53:07,111 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 10:53:07,223 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 10:53:07,329 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 10:53:07,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:53:13,216 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 10:53:13,321 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 10:53:13,432 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 10:53:13,541 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 10:53:13,648 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 10:53:13,750 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 10:53:13,915 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-07-21 10:53:14,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:53:14,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:53:18,112 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-07-21 10:53:18,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:53:18,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:53:20,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:53:20,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:53:22,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:53:23,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:53:24,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:53:24,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:53:24,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:53:24,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:53:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 89541 backedges. 1429 proven. 8491 refuted. 0 times theorem prover too weak. 79621 trivial. 0 not checked. [2020-07-21 10:53:25,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808755803] [2020-07-21 10:53:25,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:53:25,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 26 [2020-07-21 10:53:25,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260456194] [2020-07-21 10:53:25,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 10:53:25,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:53:25,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 10:53:25,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:53:25,846 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand 26 states. [2020-07-21 10:53:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:53:27,291 INFO L93 Difference]: Finished difference Result 267 states and 320 transitions. [2020-07-21 10:53:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 10:53:27,295 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 1224 [2020-07-21 10:53:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:53:27,299 INFO L225 Difference]: With dead ends: 267 [2020-07-21 10:53:27,299 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 10:53:27,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2457 GetRequests, 2402 SyntacticMatches, 21 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=432, Invalid=828, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 10:53:27,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 10:53:27,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 10:53:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 10:53:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 10:53:27,308 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1224 [2020-07-21 10:53:27,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:53:27,308 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 10:53:27,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 10:53:27,308 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 10:53:27,308 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 10:53:27,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:53:27,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 10:53:44,984 WARN L193 SmtUtils]: Spent 17.38 s on a formula simplification. DAG size of input: 1006 DAG size of output: 418 [2020-07-21 10:54:02,941 WARN L193 SmtUtils]: Spent 17.95 s on a formula simplification. DAG size of input: 1046 DAG size of output: 417 [2020-07-21 10:54:19,232 WARN L193 SmtUtils]: Spent 16.29 s on a formula simplification. DAG size of input: 1043 DAG size of output: 417 [2020-07-21 10:54:35,202 WARN L193 SmtUtils]: Spent 15.96 s on a formula simplification. DAG size of input: 1041 DAG size of output: 414 [2020-07-21 10:54:51,368 WARN L193 SmtUtils]: Spent 16.16 s on a formula simplification. DAG size of input: 1041 DAG size of output: 414 [2020-07-21 10:55:07,365 WARN L193 SmtUtils]: Spent 15.99 s on a formula simplification. DAG size of input: 1017 DAG size of output: 417