/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_7-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:59:27,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:59:27,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:59:27,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:59:27,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:59:27,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:59:27,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:59:27,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:59:27,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:59:27,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:59:27,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:59:27,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:59:27,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:59:27,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:59:27,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:59:27,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:59:27,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:59:27,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:59:27,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:59:27,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:59:27,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:59:27,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:59:27,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:59:27,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:59:27,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:59:27,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:59:27,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:59:27,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:59:27,285 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 10:59:27,326 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:59:27,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:59:27,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:59:27,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:59:27,328 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:59:27,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:59:27,329 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:59:27,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:59:27,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:59:27,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:59:27,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:59:27,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:59:27,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:59:27,330 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:59:27,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:59:27,330 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:59:27,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:59:27,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:59:27,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:59:27,331 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:59:27,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:59:27,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:59:27,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:59:27,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:59:27,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:59:27,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:59:27,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:27,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:59:27,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:59:27,333 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 10:59:27,621 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:59:27,636 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:59:27,640 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:59:27,642 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:59:27,642 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:59:27,643 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-07-21 10:59:27,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1304572d4/a9fa9d1dbede4629970cb85eb7c8d4f2/FLAG42420a590 [2020-07-21 10:59:28,215 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:59:28,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-07-21 10:59:28,224 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1304572d4/a9fa9d1dbede4629970cb85eb7c8d4f2/FLAG42420a590 [2020-07-21 10:59:28,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1304572d4/a9fa9d1dbede4629970cb85eb7c8d4f2 [2020-07-21 10:59:28,591 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:59:28,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:59:28,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:59:28,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:59:28,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:59:28,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:59:28" (1/1) ... [2020-07-21 10:59:28,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a42054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:59:28, skipping insertion in model container [2020-07-21 10:59:28,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:59:28" (1/1) ... [2020-07-21 10:59:28,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:59:28,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:59:28,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:59:28,806 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:59:28,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:59:28,839 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:59:28,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:59:28 WrapperNode [2020-07-21 10:59:28,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:59:28,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:59:28,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:59:28,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:59:28,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:59:28" (1/1) ... [2020-07-21 10:59:28,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:59:28" (1/1) ... [2020-07-21 10:59:28,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:59:28" (1/1) ... [2020-07-21 10:59:28,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:59:28" (1/1) ... [2020-07-21 10:59:28,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:59:28" (1/1) ... [2020-07-21 10:59:28,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:59:28" (1/1) ... [2020-07-21 10:59:28,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:59:28" (1/1) ... [2020-07-21 10:59:28,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:59:28,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:59:28,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:59:28,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:59:28,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:59:28" (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 10:59:29,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:59:29,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:59:29,038 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 10:59:29,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:59:29,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:59:29,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:59:29,038 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 10:59:29,039 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:59:29,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:59:29,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:59:29,242 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:59:29,242 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:59:29,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:59:29 BoogieIcfgContainer [2020-07-21 10:59:29,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:59:29,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:59:29,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:59:29,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:59:29,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:59:28" (1/3) ... [2020-07-21 10:59:29,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fef767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:59:29, skipping insertion in model container [2020-07-21 10:59:29,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:59:28" (2/3) ... [2020-07-21 10:59:29,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fef767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:59:29, skipping insertion in model container [2020-07-21 10:59:29,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:59:29" (3/3) ... [2020-07-21 10:59:29,291 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2020-07-21 10:59:29,322 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:59:29,341 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:59:29,373 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:59:29,396 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:59:29,397 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:59:29,397 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:59:29,397 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:59:29,397 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:59:29,398 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:59:29,398 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:59:29,398 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:59:29,414 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 10:59:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 10:59:29,421 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:29,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:29,423 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:29,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:29,429 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 10:59:29,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:29,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272095333] [2020-07-21 10:59:29,439 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 10:59:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:29,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:59:29,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:29,603 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 10:59:29,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:59:29,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272095333] [2020-07-21 10:59:29,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:59:29,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:59:29,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129431923] [2020-07-21 10:59:29,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:59:29,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:29,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:59:29,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:59:29,627 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 10:59:29,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:29,742 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 10:59:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:59:29,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 10:59:29,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:29,754 INFO L225 Difference]: With dead ends: 35 [2020-07-21 10:59:29,755 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 10:59:29,759 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 10:59:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 10:59:29,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 10:59:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 10:59:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 10:59:29,809 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 10:59:29,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:29,810 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 10:59:29,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:59:29,811 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 10:59:29,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 10:59:29,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:29,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:30,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:30,029 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:30,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:30,031 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 10:59:30,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:30,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515403643] [2020-07-21 10:59:30,033 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 10:59:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:30,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:59:30,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:30,099 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 10:59:30,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:59:30,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515403643] [2020-07-21 10:59:30,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:59:30,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:59:30,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775969276] [2020-07-21 10:59:30,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:59:30,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:30,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:59:30,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:59:30,104 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 10:59:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:30,201 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 10:59:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:59:30,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 10:59:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:30,206 INFO L225 Difference]: With dead ends: 27 [2020-07-21 10:59:30,207 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 10:59:30,209 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 10:59:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 10:59:30,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 10:59:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 10:59:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 10:59:30,225 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 10:59:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:30,225 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 10:59:30,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:59:30,226 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 10:59:30,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 10:59:30,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:30,231 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 10:59:30,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:30,444 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:30,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:30,445 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 10:59:30,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:30,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958313902] [2020-07-21 10:59:30,447 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 10:59:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:30,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:59:30,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:30,571 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 10:59:30,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:30,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:30,840 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 10:59:30,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958313902] [2020-07-21 10:59:30,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:30,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 10:59:30,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759325639] [2020-07-21 10:59:30,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 10:59:30,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:30,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 10:59:30,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:59:30,844 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 10:59:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:31,030 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 10:59:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:59:31,032 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 10:59:31,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:31,034 INFO L225 Difference]: With dead ends: 32 [2020-07-21 10:59:31,034 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 10:59:31,037 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 10:59:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 10:59:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 10:59:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 10:59:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 10:59:31,057 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 10:59:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:31,058 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 10:59:31,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 10:59:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 10:59:31,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 10:59:31,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:31,063 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 10:59:31,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:31,277 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:31,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:31,279 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 10:59:31,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:31,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408944083] [2020-07-21 10:59:31,280 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 10:59:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:31,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:59:31,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:31,348 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 10:59:31,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:31,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:31,521 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 10:59:31,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408944083] [2020-07-21 10:59:31,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:31,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 10:59:31,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112539929] [2020-07-21 10:59:31,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 10:59:31,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:31,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 10:59:31,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:59:31,524 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 10:59:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:31,616 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 10:59:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:59:31,617 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 10:59:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:31,619 INFO L225 Difference]: With dead ends: 37 [2020-07-21 10:59:31,619 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 10:59:31,620 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 10:59:31,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 10:59:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 10:59:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 10:59:31,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 10:59:31,629 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 10:59:31,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:31,630 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 10:59:31,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 10:59:31,630 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 10:59:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 10:59:31,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:31,632 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 10:59:31,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:31,845 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:31,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 10:59:31,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:31,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739179637] [2020-07-21 10:59:31,846 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 10:59:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:31,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:59:31,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:31,935 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 10:59:31,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:32,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:32,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:32,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:32,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:32,323 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 10:59:32,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739179637] [2020-07-21 10:59:32,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:32,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 10:59:32,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448602054] [2020-07-21 10:59:32,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:59:32,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:59:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:59:32,327 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 10:59:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:32,507 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 10:59:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:59:32,508 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 10:59:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:32,512 INFO L225 Difference]: With dead ends: 42 [2020-07-21 10:59:32,513 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 10:59:32,513 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 10:59:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 10:59:32,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 10:59:32,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 10:59:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 10:59:32,526 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 10:59:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:32,527 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 10:59:32,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:59:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 10:59:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 10:59:32,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:32,530 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 10:59:32,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:32,736 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:32,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 10:59:32,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:32,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213759989] [2020-07-21 10:59:32,738 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 10:59:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:32,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:59:32,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:32,837 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 10:59:32,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:33,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:33,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:33,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:33,162 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 10:59:33,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213759989] [2020-07-21 10:59:33,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:33,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 10:59:33,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284376836] [2020-07-21 10:59:33,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:59:33,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:33,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:59:33,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:59:33,165 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 10:59:33,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:33,312 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 10:59:33,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:59:33,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 10:59:33,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:33,316 INFO L225 Difference]: With dead ends: 47 [2020-07-21 10:59:33,316 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 10:59:33,322 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 10:59:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 10:59:33,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 10:59:33,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 10:59:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 10:59:33,348 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 10:59:33,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:33,349 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 10:59:33,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:59:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 10:59:33,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 10:59:33,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:33,354 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 10:59:33,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:33,574 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:33,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:33,574 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 10:59:33,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:33,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107692553] [2020-07-21 10:59:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:59:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:33,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:59:33,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:33,690 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 10:59:33,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:34,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,386 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 10:59:34,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107692553] [2020-07-21 10:59:34,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:34,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 10:59:34,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123059037] [2020-07-21 10:59:34,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:59:34,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:34,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:59:34,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:59:34,389 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 10:59:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:34,574 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 10:59:34,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:59:34,575 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 10:59:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:34,577 INFO L225 Difference]: With dead ends: 52 [2020-07-21 10:59:34,578 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 10:59:34,579 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 10:59:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 10:59:34,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 10:59:34,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 10:59:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 10:59:34,593 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 10:59:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:34,594 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 10:59:34,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:59:34,594 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 10:59:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 10:59:34,597 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:34,597 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 10:59:34,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:34,802 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:34,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:34,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 10:59:34,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:34,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108833193] [2020-07-21 10:59:34,805 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 10:59:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:34,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:59:34,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:34,933 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 10:59:34,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:35,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:35,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:35,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:35,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:35,586 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 10:59:35,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108833193] [2020-07-21 10:59:35,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:35,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 10:59:35,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671789248] [2020-07-21 10:59:35,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:59:35,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:35,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:59:35,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:59:35,589 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 10:59:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:35,740 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 10:59:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:59:35,741 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-21 10:59:35,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:35,744 INFO L225 Difference]: With dead ends: 57 [2020-07-21 10:59:35,744 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 10:59:35,745 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 10:59:35,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 10:59:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 10:59:35,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 10:59:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 10:59:35,763 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-21 10:59:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:35,767 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 10:59:35,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:59:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 10:59:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 10:59:35,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:35,770 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 10:59:35,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:35,983 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:35,983 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-21 10:59:35,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:35,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21805452] [2020-07-21 10:59:35,985 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 10:59:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:36,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:59:36,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:36,147 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 10:59:36,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:36,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:36,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:36,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:37,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:37,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:37,143 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 10:59:37,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21805452] [2020-07-21 10:59:37,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:37,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 10:59:37,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425026204] [2020-07-21 10:59:37,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:59:37,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:37,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:59:37,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:59:37,146 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 10:59:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:37,453 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 10:59:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:59:37,454 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-21 10:59:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:37,456 INFO L225 Difference]: With dead ends: 62 [2020-07-21 10:59:37,456 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 10:59:37,457 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 10:59:37,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 10:59:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 10:59:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 10:59:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 10:59:37,469 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-21 10:59:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:37,470 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 10:59:37,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:59:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 10:59:37,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 10:59:37,474 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:37,474 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 10:59:37,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:37,689 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:37,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-21 10:59:37,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:37,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512530102] [2020-07-21 10:59:37,690 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 10:59:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:37,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:59:37,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:37,879 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 10:59:37,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:38,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:38,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:38,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:38,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:38,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:38,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:38,996 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 10:59:38,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512530102] [2020-07-21 10:59:38,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:38,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 10:59:38,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289973333] [2020-07-21 10:59:38,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:59:38,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:38,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:59:38,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:59:38,999 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 10:59:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:39,172 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 10:59:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:59:39,173 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-21 10:59:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:39,175 INFO L225 Difference]: With dead ends: 67 [2020-07-21 10:59:39,175 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 10:59:39,177 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 10:59:39,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 10:59:39,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 10:59:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 10:59:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 10:59:39,188 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-21 10:59:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:39,189 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 10:59:39,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:59:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 10:59:39,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 10:59:39,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:39,194 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 10:59:39,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:39,402 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:39,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:39,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-21 10:59:39,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:39,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093827219] [2020-07-21 10:59:39,404 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 10:59:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:39,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:59:39,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:39,640 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 10:59:39,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:40,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:41,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:41,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:41,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:41,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:41,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:41,578 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 10:59:41,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093827219] [2020-07-21 10:59:41,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:41,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 10:59:41,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940943062] [2020-07-21 10:59:41,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:59:41,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:41,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:59:41,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:59:41,592 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 10:59:41,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:41,820 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 10:59:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:59:41,821 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 10:59:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:41,824 INFO L225 Difference]: With dead ends: 72 [2020-07-21 10:59:41,825 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 10:59:41,826 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 10:59:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 10:59:41,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 10:59:41,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 10:59:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 10:59:41,853 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 10:59:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:41,855 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 10:59:41,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:59:41,857 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 10:59:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-21 10:59:41,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:41,862 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:42,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:42,078 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:42,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:42,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1006419304, now seen corresponding path program 5 times [2020-07-21 10:59:42,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:42,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045854182] [2020-07-21 10:59:42,080 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 10:59:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:42,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:59:42,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-21 10:59:42,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:43,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:43,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:44,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:44,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:44,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:44,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-21 10:59:44,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045854182] [2020-07-21 10:59:44,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:44,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-21 10:59:44,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237114083] [2020-07-21 10:59:44,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 10:59:44,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:44,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 10:59:44,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:59:44,313 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 16 states. [2020-07-21 10:59:44,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:44,555 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 10:59:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:59:44,555 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 299 [2020-07-21 10:59:44,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:44,564 INFO L225 Difference]: With dead ends: 77 [2020-07-21 10:59:44,564 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 10:59:44,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:59:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 10:59:44,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 10:59:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 10:59:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 10:59:44,593 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-21 10:59:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:44,594 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 10:59:44,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 10:59:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 10:59:44,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 10:59:44,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:44,610 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 39, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:44,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:44,824 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:44,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:44,824 INFO L82 PathProgramCache]: Analyzing trace with hash 785285043, now seen corresponding path program 6 times [2020-07-21 10:59:44,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:44,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412442649] [2020-07-21 10:59:44,825 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 10:59:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:45,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:59:45,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2126 refuted. 0 times theorem prover too weak. 12702 trivial. 0 not checked. [2020-07-21 10:59:45,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:47,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:47,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:48,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:48,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:48,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:48,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:48,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:48,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2177 refuted. 0 times theorem prover too weak. 12651 trivial. 0 not checked. [2020-07-21 10:59:48,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412442649] [2020-07-21 10:59:48,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:48,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 10:59:48,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514150714] [2020-07-21 10:59:48,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 10:59:48,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:48,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 10:59:48,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:59:48,766 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 18 states. [2020-07-21 10:59:49,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:49,278 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 10:59:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:59:49,278 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 507 [2020-07-21 10:59:49,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:49,283 INFO L225 Difference]: With dead ends: 82 [2020-07-21 10:59:49,284 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 10:59:49,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 983 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 10:59:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 10:59:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 10:59:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 10:59:49,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 10:59:49,298 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 507 [2020-07-21 10:59:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:49,299 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 10:59:49,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 10:59:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 10:59:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 10:59:49,303 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:49,303 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 10:59:49,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:49,517 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:49,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:49,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1350718391, now seen corresponding path program 6 times [2020-07-21 10:59:49,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:49,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211138067] [2020-07-21 10:59:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:59:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:49,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:59:49,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 648 proven. 1709 refuted. 0 times theorem prover too weak. 9325 trivial. 0 not checked. [2020-07-21 10:59:49,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:51,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:51,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:52,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:52,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:52,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:52,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:52,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:52,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:52,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:53,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 652 proven. 1756 refuted. 0 times theorem prover too weak. 9274 trivial. 0 not checked. [2020-07-21 10:59:53,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211138067] [2020-07-21 10:59:53,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:53,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 10:59:53,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145250387] [2020-07-21 10:59:53,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 10:59:53,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:53,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 10:59:53,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:59:53,193 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 18 states. [2020-07-21 10:59:53,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:53,548 INFO L93 Difference]: Finished difference Result 147 states and 749 transitions. [2020-07-21 10:59:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:59:53,549 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 450 [2020-07-21 10:59:53,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:53,551 INFO L225 Difference]: With dead ends: 147 [2020-07-21 10:59:53,552 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 10:59:53,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 868 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 10:59:53,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 10:59:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-21 10:59:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 10:59:53,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 122 transitions. [2020-07-21 10:59:53,587 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 122 transitions. Word has length 450 [2020-07-21 10:59:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:53,589 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 122 transitions. [2020-07-21 10:59:53,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 10:59:53,589 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 122 transitions. [2020-07-21 10:59:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 10:59:53,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:53,595 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:53,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:53,808 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:53,809 INFO L82 PathProgramCache]: Analyzing trace with hash -530192014, now seen corresponding path program 7 times [2020-07-21 10:59:53,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:53,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159125471] [2020-07-21 10:59:53,810 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 10:59:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:54,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:59:54,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1091 proven. 467 refuted. 0 times theorem prover too weak. 4481 trivial. 0 not checked. [2020-07-21 10:59:54,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:55,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:56,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:56,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:56,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:56,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:56,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:56,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:56,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:56,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:56,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1091 proven. 518 refuted. 0 times theorem prover too weak. 4430 trivial. 0 not checked. [2020-07-21 10:59:57,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159125471] [2020-07-21 10:59:57,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:57,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 10:59:57,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11105435] [2020-07-21 10:59:57,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 10:59:57,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:57,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 10:59:57,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:59:57,017 INFO L87 Difference]: Start difference. First operand 70 states and 122 transitions. Second operand 18 states. [2020-07-21 10:59:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:57,328 INFO L93 Difference]: Finished difference Result 120 states and 219 transitions. [2020-07-21 10:59:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:59:57,329 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 327 [2020-07-21 10:59:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:57,332 INFO L225 Difference]: With dead ends: 120 [2020-07-21 10:59:57,332 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 10:59:57,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 622 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 10:59:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 10:59:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2020-07-21 10:59:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 10:59:57,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 167 transitions. [2020-07-21 10:59:57,351 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 167 transitions. Word has length 327 [2020-07-21 10:59:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:57,352 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 167 transitions. [2020-07-21 10:59:57,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 10:59:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 167 transitions. [2020-07-21 10:59:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-21 10:59:57,356 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:57,357 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 20, 20, 20, 20, 20, 20, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:57,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:57,570 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:57,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:57,571 INFO L82 PathProgramCache]: Analyzing trace with hash -301446619, now seen corresponding path program 8 times [2020-07-21 10:59:57,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:57,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173659490] [2020-07-21 10:59:57,572 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 10:59:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:57,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:59:57,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 494 proven. 483 refuted. 0 times theorem prover too weak. 3624 trivial. 0 not checked. [2020-07-21 10:59:57,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:58,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:58,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:58,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:58,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:59,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:59,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:59,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:59,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:59,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 500 proven. 505 refuted. 0 times theorem prover too weak. 3596 trivial. 0 not checked. [2020-07-21 10:59:59,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173659490] [2020-07-21 10:59:59,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:59,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-21 10:59:59,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355404125] [2020-07-21 10:59:59,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:59:59,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:59,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:59:59,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:59:59,464 INFO L87 Difference]: Start difference. First operand 90 states and 167 transitions. Second operand 14 states. [2020-07-21 10:59:59,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:59,647 INFO L93 Difference]: Finished difference Result 135 states and 267 transitions. [2020-07-21 10:59:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:59:59,647 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 287 [2020-07-21 10:59:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:59,651 INFO L225 Difference]: With dead ends: 135 [2020-07-21 10:59:59,651 INFO L226 Difference]: Without dead ends: 123 [2020-07-21 10:59:59,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 550 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:59:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-21 10:59:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 93. [2020-07-21 10:59:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 10:59:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 181 transitions. [2020-07-21 10:59:59,674 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 181 transitions. Word has length 287 [2020-07-21 10:59:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:59,675 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 181 transitions. [2020-07-21 10:59:59,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:59:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 181 transitions. [2020-07-21 10:59:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-21 10:59:59,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:59,680 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:59,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:59,894 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:59,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:59,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1320340794, now seen corresponding path program 9 times [2020-07-21 10:59:59,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:59,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830880683] [2020-07-21 10:59:59,896 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 11:00:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:00,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:00:00,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 369 proven. 1029 refuted. 0 times theorem prover too weak. 3615 trivial. 0 not checked. [2020-07-21 11:00:00,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:02,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:02,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:02,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:02,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:02,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:02,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:03,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:03,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:03,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:03,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:03,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:03,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 375 proven. 1074 refuted. 0 times theorem prover too weak. 3564 trivial. 0 not checked. [2020-07-21 11:00:03,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830880683] [2020-07-21 11:00:03,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:03,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 11:00:03,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828261347] [2020-07-21 11:00:03,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 11:00:03,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:03,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 11:00:03,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 11:00:03,283 INFO L87 Difference]: Start difference. First operand 93 states and 181 transitions. Second operand 18 states. [2020-07-21 11:00:03,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:03,629 INFO L93 Difference]: Finished difference Result 183 states and 362 transitions. [2020-07-21 11:00:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:00:03,630 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 299 [2020-07-21 11:00:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:03,633 INFO L225 Difference]: With dead ends: 183 [2020-07-21 11:00:03,633 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 11:00:03,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 566 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:00:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 11:00:03,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-07-21 11:00:03,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 11:00:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 126 transitions. [2020-07-21 11:00:03,653 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 126 transitions. Word has length 299 [2020-07-21 11:00:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:03,653 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 126 transitions. [2020-07-21 11:00:03,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 11:00:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 126 transitions. [2020-07-21 11:00:03,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 11:00:03,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:03,658 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:03,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:03,872 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:03,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:03,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 10 times [2020-07-21 11:00:03,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:03,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28549835] [2020-07-21 11:00:03,873 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 11:00:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:04,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 167 conjunts are in the unsatisfiable core [2020-07-21 11:00:04,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-07-21 11:00:04,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-07-21 11:00:08,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28549835] [2020-07-21 11:00:08,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:08,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-21 11:00:08,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393315089] [2020-07-21 11:00:08,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 11:00:08,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:08,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 11:00:08,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-21 11:00:08,181 INFO L87 Difference]: Start difference. First operand 87 states and 126 transitions. Second operand 28 states. [2020-07-21 11:00:08,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:08,704 INFO L93 Difference]: Finished difference Result 197 states and 342 transitions. [2020-07-21 11:00:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 11:00:08,704 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 286 [2020-07-21 11:00:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:08,710 INFO L225 Difference]: With dead ends: 197 [2020-07-21 11:00:08,710 INFO L226 Difference]: Without dead ends: 190 [2020-07-21 11:00:08,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 534 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2020-07-21 11:00:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-21 11:00:08,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 147. [2020-07-21 11:00:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 11:00:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 267 transitions. [2020-07-21 11:00:08,750 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 267 transitions. Word has length 286 [2020-07-21 11:00:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:08,751 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 267 transitions. [2020-07-21 11:00:08,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 11:00:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 267 transitions. [2020-07-21 11:00:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-07-21 11:00:08,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:08,761 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 34, 23, 23, 23, 23, 23, 23, 23, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:08,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:08,975 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:08,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:08,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1237982994, now seen corresponding path program 11 times [2020-07-21 11:00:08,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:08,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684201156] [2020-07-21 11:00:08,978 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 11:00:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:09,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:00:09,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5897 backedges. 602 proven. 727 refuted. 0 times theorem prover too weak. 4568 trivial. 0 not checked. [2020-07-21 11:00:09,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:10,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:10,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:10,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:10,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:11,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:11,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:11,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:11,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:11,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:11,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:11,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5897 backedges. 610 proven. 756 refuted. 0 times theorem prover too weak. 4531 trivial. 0 not checked. [2020-07-21 11:00:11,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684201156] [2020-07-21 11:00:11,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:11,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-21 11:00:11,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949136637] [2020-07-21 11:00:11,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 11:00:11,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:11,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 11:00:11,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-21 11:00:11,522 INFO L87 Difference]: Start difference. First operand 147 states and 267 transitions. Second operand 16 states. [2020-07-21 11:00:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:11,743 INFO L93 Difference]: Finished difference Result 196 states and 344 transitions. [2020-07-21 11:00:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:00:11,744 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 323 [2020-07-21 11:00:11,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:11,748 INFO L225 Difference]: With dead ends: 196 [2020-07-21 11:00:11,748 INFO L226 Difference]: Without dead ends: 184 [2020-07-21 11:00:11,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 618 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2020-07-21 11:00:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-21 11:00:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 147. [2020-07-21 11:00:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 11:00:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 267 transitions. [2020-07-21 11:00:11,779 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 267 transitions. Word has length 323 [2020-07-21 11:00:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:11,779 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 267 transitions. [2020-07-21 11:00:11,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 11:00:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 267 transitions. [2020-07-21 11:00:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-07-21 11:00:11,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:11,791 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 34, 25, 25, 25, 25, 25, 25, 25, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:12,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:12,005 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:12,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:12,005 INFO L82 PathProgramCache]: Analyzing trace with hash -982477528, now seen corresponding path program 12 times [2020-07-21 11:00:12,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:12,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051761004] [2020-07-21 11:00:12,006 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 11:00:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:12,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:00:12,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6861 backedges. 700 proven. 741 refuted. 0 times theorem prover too weak. 5420 trivial. 0 not checked. [2020-07-21 11:00:12,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:13,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:13,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:14,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:14,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:14,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:14,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:14,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:14,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:14,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6861 backedges. 706 proven. 772 refuted. 0 times theorem prover too weak. 5383 trivial. 0 not checked. [2020-07-21 11:00:14,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051761004] [2020-07-21 11:00:14,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:14,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-21 11:00:14,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189344055] [2020-07-21 11:00:14,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 11:00:14,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:14,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 11:00:14,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-21 11:00:14,667 INFO L87 Difference]: Start difference. First operand 147 states and 267 transitions. Second operand 16 states. [2020-07-21 11:00:14,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:14,904 INFO L93 Difference]: Finished difference Result 212 states and 368 transitions. [2020-07-21 11:00:14,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:00:14,905 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 347 [2020-07-21 11:00:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:14,910 INFO L225 Difference]: With dead ends: 212 [2020-07-21 11:00:14,910 INFO L226 Difference]: Without dead ends: 195 [2020-07-21 11:00:14,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 666 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2020-07-21 11:00:14,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-21 11:00:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 147. [2020-07-21 11:00:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 11:00:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 267 transitions. [2020-07-21 11:00:14,945 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 267 transitions. Word has length 347 [2020-07-21 11:00:14,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:14,945 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 267 transitions. [2020-07-21 11:00:14,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 11:00:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 267 transitions. [2020-07-21 11:00:14,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 11:00:14,956 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:14,956 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 33, 23, 23, 23, 23, 23, 23, 23, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:15,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:15,173 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:15,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:15,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1142758764, now seen corresponding path program 13 times [2020-07-21 11:00:15,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:15,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165476540] [2020-07-21 11:00:15,177 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 11:00:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:15,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 11:00:15,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5864 backedges. 398 proven. 788 refuted. 0 times theorem prover too weak. 4678 trivial. 0 not checked. [2020-07-21 11:00:15,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:16,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:17,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:17,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:17,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:17,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:17,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:17,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5864 backedges. 402 proven. 808 refuted. 0 times theorem prover too weak. 4654 trivial. 0 not checked. [2020-07-21 11:00:17,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165476540] [2020-07-21 11:00:17,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:17,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-21 11:00:17,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592181782] [2020-07-21 11:00:17,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 11:00:17,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:17,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 11:00:17,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-21 11:00:17,520 INFO L87 Difference]: Start difference. First operand 147 states and 267 transitions. Second operand 16 states. [2020-07-21 11:00:17,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:17,736 INFO L93 Difference]: Finished difference Result 197 states and 359 transitions. [2020-07-21 11:00:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:00:17,737 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 322 [2020-07-21 11:00:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:17,742 INFO L225 Difference]: With dead ends: 197 [2020-07-21 11:00:17,742 INFO L226 Difference]: Without dead ends: 177 [2020-07-21 11:00:17,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 618 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:00:17,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-21 11:00:17,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 150. [2020-07-21 11:00:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 11:00:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 270 transitions. [2020-07-21 11:00:17,772 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 270 transitions. Word has length 322 [2020-07-21 11:00:17,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:17,773 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 270 transitions. [2020-07-21 11:00:17,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 11:00:17,773 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 270 transitions. [2020-07-21 11:00:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-07-21 11:00:17,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:17,783 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 33, 22, 22, 22, 22, 22, 22, 22, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:17,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:17,997 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:17,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:17,997 INFO L82 PathProgramCache]: Analyzing trace with hash 96016501, now seen corresponding path program 14 times [2020-07-21 11:00:17,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:17,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76260157] [2020-07-21 11:00:17,998 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 11:00:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:18,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:00:18,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 367 proven. 966 refuted. 0 times theorem prover too weak. 4079 trivial. 0 not checked. [2020-07-21 11:00:18,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:19,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:20,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:20,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:20,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:20,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:20,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:20,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:20,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:20,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 368 proven. 1000 refuted. 0 times theorem prover too weak. 4044 trivial. 0 not checked. [2020-07-21 11:00:20,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76260157] [2020-07-21 11:00:20,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:20,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 11:00:20,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211820658] [2020-07-21 11:00:20,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 11:00:20,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:20,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 11:00:20,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 11:00:20,833 INFO L87 Difference]: Start difference. First operand 150 states and 270 transitions. Second operand 18 states. [2020-07-21 11:00:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:21,130 INFO L93 Difference]: Finished difference Result 248 states and 451 transitions. [2020-07-21 11:00:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:00:21,135 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 310 [2020-07-21 11:00:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:21,138 INFO L225 Difference]: With dead ends: 248 [2020-07-21 11:00:21,138 INFO L226 Difference]: Without dead ends: 150 [2020-07-21 11:00:21,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 590 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 11:00:21,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-21 11:00:21,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-07-21 11:00:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 11:00:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 250 transitions. [2020-07-21 11:00:21,180 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 250 transitions. Word has length 310 [2020-07-21 11:00:21,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:21,180 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 250 transitions. [2020-07-21 11:00:21,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 11:00:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 250 transitions. [2020-07-21 11:00:21,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 11:00:21,189 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:21,189 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:21,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:21,404 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:21,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:21,405 INFO L82 PathProgramCache]: Analyzing trace with hash 476971754, now seen corresponding path program 15 times [2020-07-21 11:00:21,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:21,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781583312] [2020-07-21 11:00:21,406 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 11:00:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:21,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 11:00:21,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 814 proven. 272 refuted. 0 times theorem prover too weak. 3894 trivial. 0 not checked. [2020-07-21 11:00:21,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:22,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:22,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 814 proven. 296 refuted. 0 times theorem prover too weak. 3870 trivial. 0 not checked. [2020-07-21 11:00:23,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781583312] [2020-07-21 11:00:23,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:23,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-21 11:00:23,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643864811] [2020-07-21 11:00:23,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 11:00:23,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:23,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 11:00:23,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-21 11:00:23,592 INFO L87 Difference]: Start difference. First operand 150 states and 250 transitions. Second operand 16 states. [2020-07-21 11:00:23,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:23,779 INFO L93 Difference]: Finished difference Result 230 states and 385 transitions. [2020-07-21 11:00:23,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:00:23,779 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 298 [2020-07-21 11:00:23,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:23,784 INFO L225 Difference]: With dead ends: 230 [2020-07-21 11:00:23,784 INFO L226 Difference]: Without dead ends: 223 [2020-07-21 11:00:23,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 570 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:00:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-21 11:00:23,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 147. [2020-07-21 11:00:23,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 11:00:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 247 transitions. [2020-07-21 11:00:23,814 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 247 transitions. Word has length 298 [2020-07-21 11:00:23,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:23,815 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 247 transitions. [2020-07-21 11:00:23,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 11:00:23,815 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 247 transitions. [2020-07-21 11:00:23,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-07-21 11:00:23,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:23,824 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 33, 22, 22, 22, 22, 22, 22, 22, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:24,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:24,039 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:24,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:24,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1671876095, now seen corresponding path program 16 times [2020-07-21 11:00:24,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:24,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094210424] [2020-07-21 11:00:24,040 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 11:00:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:24,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:00:24,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 453 proven. 880 refuted. 0 times theorem prover too weak. 4079 trivial. 0 not checked. [2020-07-21 11:00:24,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:25,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:26,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:26,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:26,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:26,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:26,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:26,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5412 backedges. 452 proven. 916 refuted. 0 times theorem prover too weak. 4044 trivial. 0 not checked. [2020-07-21 11:00:26,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094210424] [2020-07-21 11:00:26,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:26,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 11:00:26,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416318910] [2020-07-21 11:00:26,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 11:00:26,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:26,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 11:00:26,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 11:00:26,838 INFO L87 Difference]: Start difference. First operand 147 states and 247 transitions. Second operand 18 states. [2020-07-21 11:00:27,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:27,077 INFO L93 Difference]: Finished difference Result 173 states and 281 transitions. [2020-07-21 11:00:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:00:27,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 310 [2020-07-21 11:00:27,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:27,081 INFO L225 Difference]: With dead ends: 173 [2020-07-21 11:00:27,081 INFO L226 Difference]: Without dead ends: 153 [2020-07-21 11:00:27,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 590 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 11:00:27,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-21 11:00:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2020-07-21 11:00:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 11:00:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 243 transitions. [2020-07-21 11:00:27,102 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 243 transitions. Word has length 310 [2020-07-21 11:00:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:27,102 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 243 transitions. [2020-07-21 11:00:27,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 11:00:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 243 transitions. [2020-07-21 11:00:27,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-07-21 11:00:27,109 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:27,110 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 34, 22, 22, 22, 22, 22, 22, 22, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:27,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:27,324 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:27,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:27,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1124197973, now seen corresponding path program 17 times [2020-07-21 11:00:27,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:27,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086623511] [2020-07-21 11:00:27,326 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 11:00:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:27,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:00:27,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5445 backedges. 671 proven. 793 refuted. 0 times theorem prover too weak. 3981 trivial. 0 not checked. [2020-07-21 11:00:27,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:29,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:29,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:30,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:30,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:30,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:30,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:30,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:30,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:30,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:30,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5445 backedges. 673 proven. 842 refuted. 0 times theorem prover too weak. 3930 trivial. 0 not checked. [2020-07-21 11:00:30,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086623511] [2020-07-21 11:00:30,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:30,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 11:00:30,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522742395] [2020-07-21 11:00:30,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 11:00:30,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:30,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 11:00:30,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 11:00:30,698 INFO L87 Difference]: Start difference. First operand 147 states and 243 transitions. Second operand 18 states. [2020-07-21 11:00:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:30,955 INFO L93 Difference]: Finished difference Result 194 states and 306 transitions. [2020-07-21 11:00:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:00:30,956 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 311 [2020-07-21 11:00:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:30,961 INFO L225 Difference]: With dead ends: 194 [2020-07-21 11:00:30,961 INFO L226 Difference]: Without dead ends: 177 [2020-07-21 11:00:30,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 590 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:00:30,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-21 11:00:30,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 129. [2020-07-21 11:00:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-21 11:00:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 211 transitions. [2020-07-21 11:00:30,984 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 211 transitions. Word has length 311 [2020-07-21 11:00:30,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:30,984 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 211 transitions. [2020-07-21 11:00:30,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 11:00:30,984 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 211 transitions. [2020-07-21 11:00:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 11:00:30,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:30,990 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:31,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:31,237 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:31,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:31,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1448945942, now seen corresponding path program 18 times [2020-07-21 11:00:31,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:31,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347097425] [2020-07-21 11:00:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:00:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:31,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:00:31,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 960 proven. 313 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-21 11:00:31,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:32,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:33,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:33,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:33,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:33,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:33,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:33,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:33,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:33,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:33,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 955 proven. 353 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-21 11:00:34,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347097425] [2020-07-21 11:00:34,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:34,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 11:00:34,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797738593] [2020-07-21 11:00:34,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 11:00:34,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:34,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 11:00:34,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 11:00:34,067 INFO L87 Difference]: Start difference. First operand 129 states and 211 transitions. Second operand 18 states. [2020-07-21 11:00:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:34,369 INFO L93 Difference]: Finished difference Result 189 states and 298 transitions. [2020-07-21 11:00:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:00:34,370 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-21 11:00:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:34,376 INFO L225 Difference]: With dead ends: 189 [2020-07-21 11:00:34,376 INFO L226 Difference]: Without dead ends: 177 [2020-07-21 11:00:34,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 11:00:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-21 11:00:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 111. [2020-07-21 11:00:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-21 11:00:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 179 transitions. [2020-07-21 11:00:34,394 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 179 transitions. Word has length 298 [2020-07-21 11:00:34,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:34,395 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 179 transitions. [2020-07-21 11:00:34,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 11:00:34,395 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 179 transitions. [2020-07-21 11:00:34,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 11:00:34,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:34,399 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:34,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:34,614 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:34,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:34,615 INFO L82 PathProgramCache]: Analyzing trace with hash 500297194, now seen corresponding path program 19 times [2020-07-21 11:00:34,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:34,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223346181] [2020-07-21 11:00:34,616 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 11:00:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:34,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 11:00:34,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 526 proven. 560 refuted. 0 times theorem prover too weak. 3894 trivial. 0 not checked. [2020-07-21 11:00:35,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:36,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:36,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:36,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:36,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:36,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:36,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:36,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:36,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:36,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:36,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 528 proven. 582 refuted. 0 times theorem prover too weak. 3870 trivial. 0 not checked. [2020-07-21 11:00:36,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223346181] [2020-07-21 11:00:36,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:36,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-21 11:00:36,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836273394] [2020-07-21 11:00:36,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 11:00:36,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:36,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 11:00:36,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-21 11:00:36,805 INFO L87 Difference]: Start difference. First operand 111 states and 179 transitions. Second operand 16 states. [2020-07-21 11:00:36,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:36,990 INFO L93 Difference]: Finished difference Result 163 states and 253 transitions. [2020-07-21 11:00:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:00:36,991 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 298 [2020-07-21 11:00:36,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:36,994 INFO L225 Difference]: With dead ends: 163 [2020-07-21 11:00:36,994 INFO L226 Difference]: Without dead ends: 151 [2020-07-21 11:00:36,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 570 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:00:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-21 11:00:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 111. [2020-07-21 11:00:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-21 11:00:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 179 transitions. [2020-07-21 11:00:37,010 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 179 transitions. Word has length 298 [2020-07-21 11:00:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:37,010 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 179 transitions. [2020-07-21 11:00:37,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 11:00:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 179 transitions. [2020-07-21 11:00:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 11:00:37,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:37,015 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:37,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:37,230 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:37,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:37,231 INFO L82 PathProgramCache]: Analyzing trace with hash -606289430, now seen corresponding path program 20 times [2020-07-21 11:00:37,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:37,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835943841] [2020-07-21 11:00:37,232 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 11:00:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:37,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:00:37,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 614 proven. 659 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-21 11:00:37,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:39,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:39,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:39,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:39,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:39,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:39,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:39,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:40,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 611 proven. 697 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-21 11:00:40,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835943841] [2020-07-21 11:00:40,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:40,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 11:00:40,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292407661] [2020-07-21 11:00:40,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 11:00:40,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:40,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 11:00:40,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 11:00:40,235 INFO L87 Difference]: Start difference. First operand 111 states and 179 transitions. Second operand 18 states. [2020-07-21 11:00:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:40,554 INFO L93 Difference]: Finished difference Result 150 states and 230 transitions. [2020-07-21 11:00:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:00:40,555 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-21 11:00:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:40,558 INFO L225 Difference]: With dead ends: 150 [2020-07-21 11:00:40,558 INFO L226 Difference]: Without dead ends: 133 [2020-07-21 11:00:40,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 11:00:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-21 11:00:40,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-07-21 11:00:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 11:00:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 125 transitions. [2020-07-21 11:00:40,575 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 125 transitions. Word has length 298 [2020-07-21 11:00:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:40,575 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 125 transitions. [2020-07-21 11:00:40,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 11:00:40,576 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 125 transitions. [2020-07-21 11:00:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-21 11:00:40,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:40,580 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 20, 20, 20, 20, 20, 20, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:40,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:40,793 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:40,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:40,793 INFO L82 PathProgramCache]: Analyzing trace with hash -258866501, now seen corresponding path program 21 times [2020-07-21 11:00:40,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:40,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181012600] [2020-07-21 11:00:40,794 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 11:00:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:41,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:00:41,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 270 proven. 1062 refuted. 0 times theorem prover too weak. 3269 trivial. 0 not checked. [2020-07-21 11:00:41,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:42,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:42,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:43,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:43,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:43,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:43,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:43,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:43,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:43,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 280 proven. 1103 refuted. 0 times theorem prover too weak. 3218 trivial. 0 not checked. [2020-07-21 11:00:44,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181012600] [2020-07-21 11:00:44,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:44,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 11:00:44,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96612665] [2020-07-21 11:00:44,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 11:00:44,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:44,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 11:00:44,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 11:00:44,036 INFO L87 Difference]: Start difference. First operand 81 states and 125 transitions. Second operand 18 states. [2020-07-21 11:00:44,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:44,317 INFO L93 Difference]: Finished difference Result 180 states and 281 transitions. [2020-07-21 11:00:44,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:00:44,318 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 287 [2020-07-21 11:00:44,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:44,320 INFO L225 Difference]: With dead ends: 180 [2020-07-21 11:00:44,320 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 11:00:44,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 542 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:00:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 11:00:44,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-21 11:00:44,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 11:00:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-07-21 11:00:44,333 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 287 [2020-07-21 11:00:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:44,333 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-07-21 11:00:44,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 11:00:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-07-21 11:00:44,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 11:00:44,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:44,336 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:44,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:44,551 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:44,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:44,552 INFO L82 PathProgramCache]: Analyzing trace with hash -551621334, now seen corresponding path program 22 times [2020-07-21 11:00:44,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:44,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932517282] [2020-07-21 11:00:44,553 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 11:00:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:44,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:00:44,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 321 proven. 952 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-21 11:00:44,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:46,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:46,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:46,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:47,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:47,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:47,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:47,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 324 proven. 984 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-21 11:00:47,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932517282] [2020-07-21 11:00:47,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:47,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 11:00:47,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299280094] [2020-07-21 11:00:47,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 11:00:47,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:47,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 11:00:47,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 11:00:47,366 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 18 states. [2020-07-21 11:00:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:47,598 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2020-07-21 11:00:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:00:47,599 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-21 11:00:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:47,601 INFO L225 Difference]: With dead ends: 105 [2020-07-21 11:00:47,601 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 11:00:47,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 11:00:47,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 11:00:47,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-07-21 11:00:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 11:00:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-07-21 11:00:47,610 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 298 [2020-07-21 11:00:47,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:47,610 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-07-21 11:00:47,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 11:00:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-07-21 11:00:47,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 11:00:47,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:47,613 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:47,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:47,827 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:47,828 INFO L82 PathProgramCache]: Analyzing trace with hash -2133540566, now seen corresponding path program 23 times [2020-07-21 11:00:47,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:47,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630597094] [2020-07-21 11:00:47,828 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 11:00:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:48,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 11:00:48,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 328 proven. 1119 refuted. 0 times theorem prover too weak. 3533 trivial. 0 not checked. [2020-07-21 11:00:48,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:50,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:50,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:51,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:51,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:51,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:51,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:51,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:51,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 322 proven. 1176 refuted. 0 times theorem prover too weak. 3482 trivial. 0 not checked. [2020-07-21 11:00:51,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630597094] [2020-07-21 11:00:51,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:51,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 11:00:51,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764381299] [2020-07-21 11:00:51,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 11:00:51,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:51,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 11:00:51,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 11:00:51,658 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 20 states. [2020-07-21 11:00:51,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:51,979 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2020-07-21 11:00:51,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:00:51,980 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 298 [2020-07-21 11:00:51,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:51,981 INFO L225 Difference]: With dead ends: 138 [2020-07-21 11:00:51,981 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:00:51,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 11:00:51,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:00:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:00:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:00:51,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:00:51,987 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 298 [2020-07-21 11:00:51,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:51,987 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:00:51,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 11:00:51,987 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:00:51,988 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:00:52,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:52,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:00:53,845 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 301 DAG size of output: 154 [2020-07-21 11:00:56,004 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 413 DAG size of output: 215 [2020-07-21 11:00:56,653 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 154 [2020-07-21 11:00:58,432 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 413 DAG size of output: 215 [2020-07-21 11:00:58,871 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 118 [2020-07-21 11:00:59,470 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 154 [2020-07-21 11:00:59,854 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 118 [2020-07-21 11:01:01,560 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 413 DAG size of output: 215 [2020-07-21 11:01:03,639 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 435 DAG size of output: 199 [2020-07-21 11:01:04,241 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 154 [2020-07-21 11:01:04,834 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 154 [2020-07-21 11:01:06,460 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 413 DAG size of output: 215 [2020-07-21 11:01:06,943 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 189 [2020-07-21 11:01:07,188 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 105 [2020-07-21 11:01:08,951 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 428 DAG size of output: 219 [2020-07-21 11:01:09,708 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 160 [2020-07-21 11:01:11,530 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 428 DAG size of output: 219 [2020-07-21 11:01:13,364 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 413 DAG size of output: 215 [2020-07-21 11:01:13,502 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 11:01:13,962 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 135 [2020-07-21 11:01:15,801 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 428 DAG size of output: 219 [2020-07-21 11:01:17,533 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 413 DAG size of output: 215 [2020-07-21 11:01:18,128 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 154 [2020-07-21 11:01:19,937 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 428 DAG size of output: 219 [2020-07-21 11:01:21,165 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 379 DAG size of output: 200 [2020-07-21 11:01:21,769 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 154 [2020-07-21 11:01:23,526 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 413 DAG size of output: 215 [2020-07-21 11:01:24,482 WARN L193 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 179 [2020-07-21 11:01:24,625 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 11:01:26,453 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 428 DAG size of output: 219 [2020-07-21 11:01:27,338 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 174 [2020-07-21 11:01:29,108 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 413 DAG size of output: 215 [2020-07-21 11:01:30,971 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 428 DAG size of output: 219 [2020-07-21 11:01:31,928 WARN L193 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 179 [2020-07-21 11:01:32,542 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 154 [2020-07-21 11:01:32,688 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 11:01:34,404 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 418 DAG size of output: 217 [2020-07-21 11:01:36,279 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 428 DAG size of output: 219 [2020-07-21 11:01:38,024 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 408 DAG size of output: 215 [2020-07-21 11:01:38,548 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 143 [2020-07-21 11:01:40,428 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 428 DAG size of output: 219 [2020-07-21 11:01:42,176 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 413 DAG size of output: 215 [2020-07-21 11:01:44,047 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 428 DAG size of output: 219 [2020-07-21 11:01:45,771 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 413 DAG size of output: 215 [2020-07-21 11:01:45,874 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 60 [2020-07-21 11:01:46,037 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 11:01:47,896 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 428 DAG size of output: 219 [2020-07-21 11:01:49,659 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 418 DAG size of output: 217 [2020-07-21 11:01:49,847 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 11:01:50,437 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 145 [2020-07-21 11:01:52,272 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 423 DAG size of output: 219 [2020-07-21 11:01:53,959 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 408 DAG size of output: 215 [2020-07-21 11:01:54,145 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 11:01:55,978 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 428 DAG size of output: 219 [2020-07-21 11:01:56,120 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 11:01:57,471 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 380 DAG size of output: 198 [2020-07-21 11:01:59,170 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 408 DAG size of output: 215 [2020-07-21 11:02:01,009 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 428 DAG size of output: 219 [2020-07-21 11:02:02,772 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 413 DAG size of output: 217 [2020-07-21 11:02:03,347 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 145 [2020-07-21 11:02:05,248 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 423 DAG size of output: 219 [2020-07-21 11:02:06,874 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 401 DAG size of output: 207 [2020-07-21 11:02:07,016 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 11:02:08,915 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 428 DAG size of output: 219 [2020-07-21 11:02:10,364 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 392 DAG size of output: 209 [2020-07-21 11:02:11,997 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 406 DAG size of output: 209 [2020-07-21 11:02:13,837 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 428 DAG size of output: 219 [2020-07-21 11:02:15,396 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 401 DAG size of output: 207 [2020-07-21 11:02:16,026 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 157 [2020-07-21 11:02:17,842 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 423 DAG size of output: 219 [2020-07-21 11:02:19,619 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 413 DAG size of output: 218 [2020-07-21 11:02:21,396 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 418 DAG size of output: 220 [2020-07-21 11:02:21,541 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 11:02:23,365 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 423 DAG size of output: 219 [2020-07-21 11:02:23,556 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 11:02:25,295 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 416 DAG size of output: 210 [2020-07-21 11:02:25,482 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 71 [2020-07-21 11:02:27,231 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 416 DAG size of output: 210 [2020-07-21 11:02:29,128 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 428 DAG size of output: 222 [2020-07-21 11:02:29,267 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 71 [2020-07-21 11:02:29,896 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 154 [2020-07-21 11:02:30,083 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 73 [2020-07-21 11:02:30,711 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 154 [2020-07-21 11:02:31,953 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 360 DAG size of output: 188 [2020-07-21 11:02:32,571 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 154 [2020-07-21 11:02:39,559 WARN L193 SmtUtils]: Spent 6.79 s on a formula simplification. DAG size of input: 451 DAG size of output: 40 [2020-07-21 11:02:39,595 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 11:02:39,595 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:02:39,595 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:02:39,596 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 11:02:39,596 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:02:39,596 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:02:39,596 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-07-21 11:02:39,596 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-07-21 11:02:39,596 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-21 11:02:39,597 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-21 11:02:39,597 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 7 main_~x~0) (<= main_~x~0 7)) [2020-07-21 11:02:39,597 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-07-21 11:02:39,597 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-21 11:02:39,597 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-07-21 11:02:39,597 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-07-21 11:02:39,597 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-07-21 11:02:39,597 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-07-21 11:02:39,597 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (<= 2 |fibo_#in~n|)) [2020-07-21 11:02:39,597 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-21 11:02:39,598 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (and (or (<= |fibo_#in~n| 6) (<= 8 |fibo_#in~n|) (= |fibo_#t~ret0| 8)) (or (<= 4 |fibo_#in~n|) (= |fibo_#t~ret0| 1)) (let ((.cse0 (<= fibo_~n |fibo_#in~n|)) (.cse1 (<= |fibo_#in~n| fibo_~n))) (or (and .cse0 .cse1 (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3)) (and .cse0 .cse1 (= 5 |fibo_#t~ret0|) (<= 6 |fibo_#in~n|)) (and (<= 5 |fibo_#in~n|) .cse0 .cse1 (<= |fibo_#in~n| 5) (= |fibo_#t~ret0| 3)) (and .cse0 (<= |fibo_#in~n| 2) .cse1 (<= 2 |fibo_#in~n|)) (and .cse0 .cse1 (<= 7 |fibo_#in~n|)) (and .cse0 (= |fibo_#t~ret0| 2) .cse1 (<= |fibo_#in~n| 4))))) [2020-07-21 11:02:39,598 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-07-21 11:02:39,598 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-07-21 11:02:39,598 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-07-21 11:02:39,598 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-07-21 11:02:39,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:02:39 BoogieIcfgContainer [2020-07-21 11:02:39,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:02:39,608 INFO L168 Benchmark]: Toolchain (without parser) took 191015.98 ms. Allocated memory was 141.0 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 104.1 MB in the beginning and 961.4 MB in the end (delta: -857.3 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2020-07-21 11:02:39,609 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 11:02:39,609 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.71 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 94.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:02:39,609 INFO L168 Benchmark]: Boogie Preprocessor took 31.71 ms. Allocated memory is still 141.0 MB. Free memory was 94.0 MB in the beginning and 92.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:02:39,610 INFO L168 Benchmark]: RCFGBuilder took 375.38 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 92.7 MB in the beginning and 172.8 MB in the end (delta: -80.1 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:02:39,610 INFO L168 Benchmark]: TraceAbstraction took 190346.61 ms. Allocated memory was 204.5 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 172.1 MB in the beginning and 961.4 MB in the end (delta: -789.3 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2020-07-21 11:02:39,612 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.71 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 94.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.71 ms. Allocated memory is still 141.0 MB. Free memory was 94.0 MB in the beginning and 92.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 375.38 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 92.7 MB in the beginning and 172.8 MB in the end (delta: -80.1 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 190346.61 ms. Allocated memory was 204.5 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 172.1 MB in the beginning and 961.4 MB in the end (delta: -789.3 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 82.8s, OverallIterations: 31, TraceHistogramMax: 77, AutomataDifference: 7.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 107.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 825 SDtfs, 987 SDslu, 3642 SDs, 0 SdLazy, 4325 SolverSat, 1392 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14842 GetRequests, 13938 SyntacticMatches, 332 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=150occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 31 MinimizatonAttempts, 671 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 296 PreInvPairs, 16725 NumberOfFragments, 119 HoareAnnotationTreeSize, 296 FomulaSimplifications, 38588464811 FormulaSimplificationTreeSizeReduction, 100.4s HoareSimplificationTime, 8 FomulaSimplificationsInter, 25536598 FormulaSimplificationTreeSizeReductionInter, 6.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 61.2s InterpolantComputationTime, 7367 NumberOfCodeBlocks, 7367 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 14647 ConstructedInterpolants, 0 QuantifiedInterpolants, 6613132 SizeOfPredicates, 183 NumberOfNonLiveVariables, 16406 ConjunctsInSsa, 542 ConjunctsInUnsatCore, 60 InterpolantComputations, 2 PerfectInterpolantSequences, 217726/259000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...