/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_2calls_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:08:24,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:08:24,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:08:24,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:08:24,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:08:24,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:08:24,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:08:24,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:08:24,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:08:24,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:08:24,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:08:24,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:08:24,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:08:24,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:08:24,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:08:24,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:08:24,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:08:24,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:08:24,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:08:24,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:08:24,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:08:24,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:08:24,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:08:24,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:08:24,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:08:24,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:08:24,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:08:24,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:08:24,403 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:08:24,424 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:08:24,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:08:24,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:08:24,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:08:24,428 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:08:24,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:08:24,429 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:08:24,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:08:24,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:08:24,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:08:24,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:08:24,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:08:24,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:08:24,431 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:08:24,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:08:24,431 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:08:24,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:08:24,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:08:24,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:08:24,432 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:08:24,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:08:24,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:08:24,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:08:24,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:08:24,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:08:24,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:08:24,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:24,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:08:24,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:08:24,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:08:24,857 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:08:24,877 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:08:24,883 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:08:24,886 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:08:24,887 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:08:24,888 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-07-20 11:08:25,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a9a74b40/3daa4882f18e4e57a7d00857ae1d7095/FLAG51a23b680 [2020-07-20 11:08:25,850 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:08:25,852 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-07-20 11:08:25,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a9a74b40/3daa4882f18e4e57a7d00857ae1d7095/FLAG51a23b680 [2020-07-20 11:08:26,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a9a74b40/3daa4882f18e4e57a7d00857ae1d7095 [2020-07-20 11:08:26,177 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:08:26,183 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:08:26,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:08:26,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:08:26,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:08:26,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:08:26" (1/1) ... [2020-07-20 11:08:26,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16962150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:26, skipping insertion in model container [2020-07-20 11:08:26,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:08:26" (1/1) ... [2020-07-20 11:08:26,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:08:26,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:08:26,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:08:26,534 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:08:26,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:08:26,582 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:08:26,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:26 WrapperNode [2020-07-20 11:08:26,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:08:26,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:08:26,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:08:26,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:08:26,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:26" (1/1) ... [2020-07-20 11:08:26,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:26" (1/1) ... [2020-07-20 11:08:26,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:26" (1/1) ... [2020-07-20 11:08:26,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:26" (1/1) ... [2020-07-20 11:08:26,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:26" (1/1) ... [2020-07-20 11:08:26,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:26" (1/1) ... [2020-07-20 11:08:26,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:26" (1/1) ... [2020-07-20 11:08:26,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:08:26,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:08:26,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:08:26,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:08:26,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:08:26,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:08:26,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:08:26,889 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 11:08:26,890 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 11:08:26,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:08:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:08:26,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:08:26,892 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 11:08:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 11:08:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:08:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:08:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:08:27,201 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:08:27,202 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:08:27,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:08:27 BoogieIcfgContainer [2020-07-20 11:08:27,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:08:27,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:08:27,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:08:27,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:08:27,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:08:26" (1/3) ... [2020-07-20 11:08:27,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100f6c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:08:27, skipping insertion in model container [2020-07-20 11:08:27,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:26" (2/3) ... [2020-07-20 11:08:27,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100f6c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:08:27, skipping insertion in model container [2020-07-20 11:08:27,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:08:27" (3/3) ... [2020-07-20 11:08:27,228 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2020-07-20 11:08:27,250 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:08:27,268 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:08:27,299 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:08:27,378 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:08:27,379 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:08:27,379 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:08:27,379 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:08:27,380 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:08:27,380 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:08:27,380 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:08:27,380 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:08:27,418 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 11:08:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:08:27,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:27,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:27,432 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:27,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:27,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 11:08:27,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:27,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548740543] [2020-07-20 11:08:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:27,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:08:27,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:08:27,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:08:27,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548740543] [2020-07-20 11:08:27,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:08:27,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:08:27,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895421943] [2020-07-20 11:08:27,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:08:27,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:27,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:08:27,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:08:27,724 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 11:08:27,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:27,904 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 11:08:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:08:27,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 11:08:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:27,922 INFO L225 Difference]: With dead ends: 44 [2020-07-20 11:08:27,923 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 11:08:27,929 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 [2020-07-20 11:08:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 11:08:27,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 11:08:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:08:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 11:08:28,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 11:08:28,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:28,008 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 11:08:28,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:08:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 11:08:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:08:28,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:28,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:28,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:28,228 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:28,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:28,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 11:08:28,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:28,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503282186] [2020-07-20 11:08:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:28,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:08:28,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:08:28,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:08:28,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503282186] [2020-07-20 11:08:28,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:08:28,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:08:28,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879224170] [2020-07-20 11:08:28,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:08:28,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:28,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:08:28,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:08:28,358 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 11:08:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:28,467 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 11:08:28,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:08:28,468 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 11:08:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:28,471 INFO L225 Difference]: With dead ends: 36 [2020-07-20 11:08:28,471 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 11:08:28,473 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 [2020-07-20 11:08:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 11:08:28,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 11:08:28,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:08:28,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 11:08:28,487 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 11:08:28,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:28,488 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 11:08:28,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:08:28,488 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 11:08:28,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:08:28,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:28,491 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:28,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:28,705 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:28,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:28,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 11:08:28,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:28,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501196897] [2020-07-20 11:08:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:28,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:08:28,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:08:28,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:29,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:29,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:08:29,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501196897] [2020-07-20 11:08:29,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:29,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 11:08:29,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690416313] [2020-07-20 11:08:29,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:08:29,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:29,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:08:29,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:08:29,177 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 11:08:29,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:29,347 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 11:08:29,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:08:29,348 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 11:08:29,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:29,351 INFO L225 Difference]: With dead ends: 41 [2020-07-20 11:08:29,351 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 11:08:29,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:08:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 11:08:29,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 11:08:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:08:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 11:08:29,364 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 11:08:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:29,365 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 11:08:29,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:08:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 11:08:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:08:29,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:29,368 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:29,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:29,584 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:29,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:29,586 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 11:08:29,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:29,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117161027] [2020-07-20 11:08:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:29,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:08:29,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:08:29,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:29,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:29,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:08:29,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117161027] [2020-07-20 11:08:29,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:29,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 11:08:29,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596589814] [2020-07-20 11:08:29,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:08:29,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:29,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:08:29,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:08:29,941 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 11:08:30,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:30,123 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 11:08:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:08:30,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 11:08:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:30,127 INFO L225 Difference]: With dead ends: 46 [2020-07-20 11:08:30,127 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 11:08:30,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:08:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 11:08:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 11:08:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:08:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 11:08:30,139 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 11:08:30,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:30,140 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 11:08:30,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:08:30,140 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 11:08:30,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 11:08:30,142 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:30,143 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:30,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:30,356 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:30,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:30,357 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 11:08:30,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:30,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97800215] [2020-07-20 11:08:30,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:30,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:08:30,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 11:08:30,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:30,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:30,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:30,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:08:31,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97800215] [2020-07-20 11:08:31,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:31,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 11:08:31,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605748201] [2020-07-20 11:08:31,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:08:31,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:31,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:08:31,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:08:31,006 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 11:08:31,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:31,251 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 11:08:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:08:31,254 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 11:08:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:31,259 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:08:31,260 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 11:08:31,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:08:31,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 11:08:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 11:08:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:08:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 11:08:31,303 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 11:08:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:31,305 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 11:08:31,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:08:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 11:08:31,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 11:08:31,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:31,313 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:31,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:31,515 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:31,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:31,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 11:08:31,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:31,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895004540] [2020-07-20 11:08:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:31,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:08:31,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 11:08:31,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:31,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:32,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:32,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:08:32,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895004540] [2020-07-20 11:08:32,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:32,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 11:08:32,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927489797] [2020-07-20 11:08:32,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:08:32,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:32,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:08:32,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:08:32,068 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-20 11:08:32,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:32,395 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-20 11:08:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:08:32,400 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 11:08:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:32,406 INFO L225 Difference]: With dead ends: 56 [2020-07-20 11:08:32,407 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 11:08:32,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:08:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 11:08:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-20 11:08:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:08:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 11:08:32,445 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-20 11:08:32,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:32,448 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 11:08:32,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:08:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 11:08:32,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 11:08:32,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:32,458 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:32,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:32,676 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:32,677 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-20 11:08:32,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:32,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986704935] [2020-07-20 11:08:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:32,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:08:32,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 11:08:32,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:33,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:33,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:33,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:33,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 11:08:33,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986704935] [2020-07-20 11:08:33,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:33,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 11:08:33,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867928004] [2020-07-20 11:08:33,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:08:33,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:33,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:08:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:08:33,603 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-20 11:08:33,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:33,937 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-20 11:08:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:08:33,938 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-20 11:08:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:33,942 INFO L225 Difference]: With dead ends: 61 [2020-07-20 11:08:33,944 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 11:08:33,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:08:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 11:08:33,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-20 11:08:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:08:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 11:08:34,000 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-20 11:08:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:34,001 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 11:08:34,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:08:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 11:08:34,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 11:08:34,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:34,011 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:34,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:34,220 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:34,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:34,221 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 11:08:34,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:34,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426423147] [2020-07-20 11:08:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:34,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:08:34,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 11:08:34,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:34,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:34,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:34,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:34,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:34,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 11:08:35,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426423147] [2020-07-20 11:08:35,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:35,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 11:08:35,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102021289] [2020-07-20 11:08:35,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:08:35,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:35,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:08:35,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:08:35,059 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 13 states. [2020-07-20 11:08:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:35,340 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-20 11:08:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:08:35,342 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-07-20 11:08:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:35,345 INFO L225 Difference]: With dead ends: 66 [2020-07-20 11:08:35,345 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 11:08:35,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:08:35,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 11:08:35,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-20 11:08:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:08:35,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 11:08:35,363 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-20 11:08:35,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:35,364 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 11:08:35,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:08:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 11:08:35,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 11:08:35,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:35,367 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:35,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:35,584 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:35,585 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-20 11:08:35,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:35,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086953635] [2020-07-20 11:08:35,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:35,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:08:35,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-20 11:08:35,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:36,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:36,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:36,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:36,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:36,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:36,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:36,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 11:08:36,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086953635] [2020-07-20 11:08:36,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:36,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:08:36,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090035504] [2020-07-20 11:08:36,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:08:36,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:36,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:08:36,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:08:36,977 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 15 states. [2020-07-20 11:08:37,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:37,339 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-20 11:08:37,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:08:37,340 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-07-20 11:08:37,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:37,343 INFO L225 Difference]: With dead ends: 71 [2020-07-20 11:08:37,343 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 11:08:37,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:08:37,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 11:08:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-20 11:08:37,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 11:08:37,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 11:08:37,362 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-20 11:08:37,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:37,363 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 11:08:37,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:08:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 11:08:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 11:08:37,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:37,366 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:37,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:37,581 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:37,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:37,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-20 11:08:37,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:37,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201406945] [2020-07-20 11:08:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:37,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:08:37,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 27 proven. 79 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-07-20 11:08:37,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:38,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:38,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:38,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:38,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 27 proven. 83 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-07-20 11:08:38,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201406945] [2020-07-20 11:08:38,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:38,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 11:08:38,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674813871] [2020-07-20 11:08:38,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:08:38,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:38,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:08:38,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:08:38,548 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 13 states. [2020-07-20 11:08:38,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:38,817 INFO L93 Difference]: Finished difference Result 84 states and 164 transitions. [2020-07-20 11:08:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:08:38,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-07-20 11:08:38,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:38,832 INFO L225 Difference]: With dead ends: 84 [2020-07-20 11:08:38,833 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 11:08:38,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 196 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:08:38,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 11:08:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2020-07-20 11:08:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 11:08:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2020-07-20 11:08:38,892 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 108 [2020-07-20 11:08:38,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:38,893 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2020-07-20 11:08:38,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:08:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2020-07-20 11:08:38,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 11:08:38,900 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:38,900 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:39,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:39,103 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:39,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:39,104 INFO L82 PathProgramCache]: Analyzing trace with hash -60364660, now seen corresponding path program 1 times [2020-07-20 11:08:39,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:39,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289742601] [2020-07-20 11:08:39,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:39,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:08:39,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 56 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-07-20 11:08:39,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:39,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:39,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:39,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-07-20 11:08:39,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289742601] [2020-07-20 11:08:39,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:39,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 11:08:39,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607961826] [2020-07-20 11:08:39,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:08:39,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:39,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:08:39,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:08:39,806 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand 11 states. [2020-07-20 11:08:40,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:40,011 INFO L93 Difference]: Finished difference Result 79 states and 145 transitions. [2020-07-20 11:08:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:08:40,014 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2020-07-20 11:08:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:40,017 INFO L225 Difference]: With dead ends: 79 [2020-07-20 11:08:40,018 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 11:08:40,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 202 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:08:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 11:08:40,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-07-20 11:08:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 11:08:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 85 transitions. [2020-07-20 11:08:40,035 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 85 transitions. Word has length 109 [2020-07-20 11:08:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:40,036 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 85 transitions. [2020-07-20 11:08:40,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:08:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 85 transitions. [2020-07-20 11:08:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 11:08:40,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:40,039 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:40,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:40,254 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:40,255 INFO L82 PathProgramCache]: Analyzing trace with hash 836558126, now seen corresponding path program 1 times [2020-07-20 11:08:40,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:40,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340863003] [2020-07-20 11:08:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:40,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:08:40,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 81 proven. 105 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-07-20 11:08:40,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:41,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:41,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:41,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:41,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:41,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:41,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:41,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 81 proven. 113 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-07-20 11:08:41,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340863003] [2020-07-20 11:08:41,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:41,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:08:41,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383020257] [2020-07-20 11:08:41,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:08:41,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:41,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:08:41,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:08:41,714 INFO L87 Difference]: Start difference. First operand 54 states and 85 transitions. Second operand 15 states. [2020-07-20 11:08:42,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:42,109 INFO L93 Difference]: Finished difference Result 94 states and 199 transitions. [2020-07-20 11:08:42,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:08:42,110 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-07-20 11:08:42,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:42,112 INFO L225 Difference]: With dead ends: 94 [2020-07-20 11:08:42,112 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 11:08:42,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:08:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 11:08:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-07-20 11:08:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 11:08:42,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 95 transitions. [2020-07-20 11:08:42,130 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 95 transitions. Word has length 135 [2020-07-20 11:08:42,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:42,131 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 95 transitions. [2020-07-20 11:08:42,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:08:42,132 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 95 transitions. [2020-07-20 11:08:42,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 11:08:42,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:42,137 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:42,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:42,352 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:42,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1608635723, now seen corresponding path program 2 times [2020-07-20 11:08:42,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:42,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55315524] [2020-07-20 11:08:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:42,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:08:42,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 48 proven. 78 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2020-07-20 11:08:42,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:43,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:43,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:43,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:43,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:43,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 48 proven. 82 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-07-20 11:08:43,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55315524] [2020-07-20 11:08:43,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:43,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 11:08:43,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767223469] [2020-07-20 11:08:43,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:08:43,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:08:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:08:43,330 INFO L87 Difference]: Start difference. First operand 62 states and 95 transitions. Second operand 13 states. [2020-07-20 11:08:43,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:43,600 INFO L93 Difference]: Finished difference Result 92 states and 161 transitions. [2020-07-20 11:08:43,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:08:43,603 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-07-20 11:08:43,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:43,606 INFO L225 Difference]: With dead ends: 92 [2020-07-20 11:08:43,607 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 11:08:43,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 221 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:08:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 11:08:43,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-07-20 11:08:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 11:08:43,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 103 transitions. [2020-07-20 11:08:43,624 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 103 transitions. Word has length 121 [2020-07-20 11:08:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:43,625 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 103 transitions. [2020-07-20 11:08:43,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:08:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 103 transitions. [2020-07-20 11:08:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-20 11:08:43,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:43,628 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:43,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:43,844 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:43,845 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 3 times [2020-07-20 11:08:43,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:43,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243101933] [2020-07-20 11:08:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:43,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:08:43,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-20 11:08:43,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:44,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:44,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:44,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:44,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-07-20 11:08:44,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243101933] [2020-07-20 11:08:44,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:44,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 11:08:44,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433105799] [2020-07-20 11:08:44,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:08:44,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:44,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:08:44,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:08:44,459 INFO L87 Difference]: Start difference. First operand 65 states and 103 transitions. Second operand 11 states. [2020-07-20 11:08:44,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:44,640 INFO L93 Difference]: Finished difference Result 84 states and 140 transitions. [2020-07-20 11:08:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:08:44,641 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 95 [2020-07-20 11:08:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:44,644 INFO L225 Difference]: With dead ends: 84 [2020-07-20 11:08:44,644 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 11:08:44,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 173 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:08:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 11:08:44,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-07-20 11:08:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 11:08:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 122 transitions. [2020-07-20 11:08:44,658 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 122 transitions. Word has length 95 [2020-07-20 11:08:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:44,659 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 122 transitions. [2020-07-20 11:08:44,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:08:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 122 transitions. [2020-07-20 11:08:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 11:08:44,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:44,662 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:44,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:44,877 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:44,877 INFO L82 PathProgramCache]: Analyzing trace with hash 594466134, now seen corresponding path program 4 times [2020-07-20 11:08:44,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:44,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430835660] [2020-07-20 11:08:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:44,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:08:44,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 83 proven. 24 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-07-20 11:08:45,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:45,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:45,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:45,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:45,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:45,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-20 11:08:45,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430835660] [2020-07-20 11:08:45,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:45,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 11:08:45,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635114316] [2020-07-20 11:08:45,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:08:45,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:45,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:08:45,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:08:45,795 INFO L87 Difference]: Start difference. First operand 72 states and 122 transitions. Second operand 13 states. [2020-07-20 11:08:46,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:46,045 INFO L93 Difference]: Finished difference Result 92 states and 158 transitions. [2020-07-20 11:08:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:08:46,047 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 107 [2020-07-20 11:08:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:46,049 INFO L225 Difference]: With dead ends: 92 [2020-07-20 11:08:46,049 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 11:08:46,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 193 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:08:46,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 11:08:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2020-07-20 11:08:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-20 11:08:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-20 11:08:46,072 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 107 [2020-07-20 11:08:46,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:46,073 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-20 11:08:46,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:08:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-20 11:08:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 11:08:46,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:46,076 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:46,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:46,290 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:46,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:46,292 INFO L82 PathProgramCache]: Analyzing trace with hash 235412830, now seen corresponding path program 5 times [2020-07-20 11:08:46,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:46,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190701949] [2020-07-20 11:08:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:46,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:08:46,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 19 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-07-20 11:08:46,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:46,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:46,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:46,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:46,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-20 11:08:46,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190701949] [2020-07-20 11:08:46,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:46,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 11:08:46,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826383797] [2020-07-20 11:08:46,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:08:46,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:46,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:08:46,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:08:46,969 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 11 states. [2020-07-20 11:08:47,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:47,152 INFO L93 Difference]: Finished difference Result 91 states and 155 transitions. [2020-07-20 11:08:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:08:47,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-07-20 11:08:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:47,157 INFO L225 Difference]: With dead ends: 91 [2020-07-20 11:08:47,157 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 11:08:47,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:08:47,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 11:08:47,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-07-20 11:08:47,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-20 11:08:47,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-20 11:08:47,172 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 108 [2020-07-20 11:08:47,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:47,173 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-20 11:08:47,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:08:47,173 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-20 11:08:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 11:08:47,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:47,176 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:47,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:47,390 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:47,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:47,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 6 times [2020-07-20 11:08:47,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:47,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142041508] [2020-07-20 11:08:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:08:47,505 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:08:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:08:47,531 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:08:47,608 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:08:47,608 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:08:47,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:47,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:08:47 BoogieIcfgContainer [2020-07-20 11:08:47,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:08:47,915 INFO L168 Benchmark]: Toolchain (without parser) took 21734.26 ms. Allocated memory was 144.2 MB in the beginning and 397.4 MB in the end (delta: 253.2 MB). Free memory was 100.5 MB in the beginning and 336.7 MB in the end (delta: -236.2 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:08:47,916 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 11:08:47,917 INFO L168 Benchmark]: CACSL2BoogieTranslator took 400.13 ms. Allocated memory is still 144.2 MB. Free memory was 100.1 MB in the beginning and 90.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:08:47,918 INFO L168 Benchmark]: Boogie Preprocessor took 50.57 ms. Allocated memory is still 144.2 MB. Free memory was 90.6 MB in the beginning and 89.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:08:47,919 INFO L168 Benchmark]: RCFGBuilder took 573.95 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 89.3 MB in the beginning and 168.9 MB in the end (delta: -79.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:08:47,920 INFO L168 Benchmark]: TraceAbstraction took 20697.96 ms. Allocated memory was 202.4 MB in the beginning and 397.4 MB in the end (delta: 195.0 MB). Free memory was 168.2 MB in the beginning and 336.7 MB in the end (delta: -168.5 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:08:47,923 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 144.2 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 400.13 ms. Allocated memory is still 144.2 MB. Free memory was 100.1 MB in the beginning and 90.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 50.57 ms. Allocated memory is still 144.2 MB. Free memory was 90.6 MB in the beginning and 89.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 573.95 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 89.3 MB in the beginning and 168.9 MB in the end (delta: -79.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20697.96 ms. Allocated memory was 202.4 MB in the beginning and 397.4 MB in the end (delta: 195.0 MB). Free memory was 168.2 MB in the beginning and 336.7 MB in the end (delta: -168.5 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 5; VAL [x=5] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=5, x=5] [L37] int result = fibo1(x); [L38] COND TRUE result == 5 VAL [result=5, x=5] [L39] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 20.4s, OverallIterations: 17, TraceHistogramMax: 11, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 372 SDtfs, 564 SDslu, 1730 SDs, 0 SdLazy, 1676 SolverSat, 421 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2277 GetRequests, 1968 SyntacticMatches, 107 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 185 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 10.6s InterpolantComputationTime, 1235 NumberOfCodeBlocks, 1235 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 2195 ConstructedInterpolants, 0 QuantifiedInterpolants, 368621 SizeOfPredicates, 67 NumberOfNonLiveVariables, 2536 ConjunctsInSsa, 134 ConjunctsInUnsatCore, 30 InterpolantComputations, 2 PerfectInterpolantSequences, 3469/4520 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 incorrect! Received shutdown request...