/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:28:13,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:28:13,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:28:13,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:28:13,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:28:13,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:28:13,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:28:13,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:28:13,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:28:13,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:28:13,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:28:13,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:28:13,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:28:13,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:28:13,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:28:13,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:28:13,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:28:13,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:28:13,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:28:13,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:28:13,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:28:13,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:28:13,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:28:13,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:28:13,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:28:14,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:28:14,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:28:14,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:28:14,012 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 16:28:14,047 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:28:14,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:28:14,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:28:14,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:28:14,055 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:28:14,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:28:14,055 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:28:14,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:28:14,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:28:14,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:28:14,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:28:14,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:28:14,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:28:14,056 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:28:14,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:28:14,057 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:28:14,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:28:14,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:28:14,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:28:14,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:28:14,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:28:14,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:28:14,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:28:14,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:28:14,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:28:14,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:28:14,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:14,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:28:14,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:28:14,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:28:14,398 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:28:14,412 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:28:14,416 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:28:14,418 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:28:14,418 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:28:14,419 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-20 16:28:14,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e7a07132/fc55fd5d98f24884bfb688845bb1982d/FLAG9374858bb [2020-07-20 16:28:14,961 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:28:14,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-20 16:28:14,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e7a07132/fc55fd5d98f24884bfb688845bb1982d/FLAG9374858bb [2020-07-20 16:28:15,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e7a07132/fc55fd5d98f24884bfb688845bb1982d [2020-07-20 16:28:15,340 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:28:15,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:28:15,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:28:15,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:28:15,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:28:15,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:28:15" (1/1) ... [2020-07-20 16:28:15,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c24edc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:15, skipping insertion in model container [2020-07-20 16:28:15,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:28:15" (1/1) ... [2020-07-20 16:28:15,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:28:15,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:28:15,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:28:15,577 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:28:15,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:28:15,614 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:28:15,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:15 WrapperNode [2020-07-20 16:28:15,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:28:15,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:28:15,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:28:15,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:28:15,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:15" (1/1) ... [2020-07-20 16:28:15,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:15" (1/1) ... [2020-07-20 16:28:15,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:15" (1/1) ... [2020-07-20 16:28:15,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:15" (1/1) ... [2020-07-20 16:28:15,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:15" (1/1) ... [2020-07-20 16:28:15,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:15" (1/1) ... [2020-07-20 16:28:15,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:15" (1/1) ... [2020-07-20 16:28:15,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:28:15,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:28:15,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:28:15,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:28:15,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:15" (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 16:28:15,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:28:15,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:28:15,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-20 16:28:15,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:28:15,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:28:15,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 16:28:15,809 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-20 16:28:15,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:28:15,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:28:15,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:28:16,046 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:28:16,046 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 16:28:16,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:28:16 BoogieIcfgContainer [2020-07-20 16:28:16,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:28:16,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:28:16,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:28:16,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:28:16,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:28:15" (1/3) ... [2020-07-20 16:28:16,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f083f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:28:16, skipping insertion in model container [2020-07-20 16:28:16,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:15" (2/3) ... [2020-07-20 16:28:16,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f083f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:28:16, skipping insertion in model container [2020-07-20 16:28:16,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:28:16" (3/3) ... [2020-07-20 16:28:16,078 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-07-20 16:28:16,097 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:28:16,109 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:28:16,154 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:28:16,205 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:28:16,205 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:28:16,205 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:28:16,205 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:28:16,206 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:28:16,206 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:28:16,206 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:28:16,208 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:28:16,228 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 16:28:16,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 16:28:16,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:16,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:16,239 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:16,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:16,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-20 16:28:16,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:16,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198296967] [2020-07-20 16:28:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:16,330 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:16,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:16,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 16:28:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:16,452 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 16:28:16,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:28:16,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198296967] [2020-07-20 16:28:16,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:28:16,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 16:28:16,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182724936] [2020-07-20 16:28:16,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 16:28:16,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:16,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 16:28:16,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:28:16,477 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-07-20 16:28:16,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:16,714 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-07-20 16:28:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:28:16,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-20 16:28:16,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:16,730 INFO L225 Difference]: With dead ends: 39 [2020-07-20 16:28:16,731 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 16:28:16,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 16:28:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 16:28:16,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 16:28:16,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 16:28:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-20 16:28:16,793 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2020-07-20 16:28:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:16,794 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-20 16:28:16,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 16:28:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-20 16:28:16,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 16:28:16,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:16,797 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] [2020-07-20 16:28:17,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:17,012 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:17,013 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-20 16:28:17,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:17,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176846305] [2020-07-20 16:28:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:17,062 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:17,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:17,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:28:17,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 16:28:17,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 16:28:17,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176846305] [2020-07-20 16:28:17,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 16:28:17,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2020-07-20 16:28:17,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307503507] [2020-07-20 16:28:17,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 16:28:17,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:17,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 16:28:17,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:28:17,442 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 8 states. [2020-07-20 16:28:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:17,663 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-07-20 16:28:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:28:17,664 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-20 16:28:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:17,668 INFO L225 Difference]: With dead ends: 32 [2020-07-20 16:28:17,669 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 16:28:17,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:28:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 16:28:17,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 16:28:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 16:28:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-07-20 16:28:17,694 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 22 [2020-07-20 16:28:17,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:17,694 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-07-20 16:28:17,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 16:28:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-07-20 16:28:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 16:28:17,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:17,698 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:17,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:17,914 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:17,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:17,915 INFO L82 PathProgramCache]: Analyzing trace with hash 408363011, now seen corresponding path program 1 times [2020-07-20 16:28:17,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:17,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826128168] [2020-07-20 16:28:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:17,974 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:17,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:17,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 16:28:17,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:28:18,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:28:18,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826128168] [2020-07-20 16:28:18,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:18,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 16:28:18,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607588792] [2020-07-20 16:28:18,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 16:28:18,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:18,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 16:28:18,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 16:28:18,224 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 9 states. [2020-07-20 16:28:18,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:18,376 INFO L93 Difference]: Finished difference Result 53 states and 81 transitions. [2020-07-20 16:28:18,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 16:28:18,377 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-20 16:28:18,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:18,379 INFO L225 Difference]: With dead ends: 53 [2020-07-20 16:28:18,379 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 16:28:18,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:28:18,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 16:28:18,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 16:28:18,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 16:28:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-07-20 16:28:18,390 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2020-07-20 16:28:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:18,391 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-07-20 16:28:18,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 16:28:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-07-20 16:28:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 16:28:18,393 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:18,394 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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 16:28:18,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:18,609 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:18,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:18,611 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2020-07-20 16:28:18,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:18,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333801391] [2020-07-20 16:28:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:18,657 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:28:18,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:18,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:28:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 16:28:18,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 16:28:19,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333801391] [2020-07-20 16:28:19,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:19,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2020-07-20 16:28:19,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006754606] [2020-07-20 16:28:19,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 16:28:19,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:19,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 16:28:19,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-07-20 16:28:19,384 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 22 states. [2020-07-20 16:28:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:20,079 INFO L93 Difference]: Finished difference Result 56 states and 88 transitions. [2020-07-20 16:28:20,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 16:28:20,080 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-07-20 16:28:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:20,088 INFO L225 Difference]: With dead ends: 56 [2020-07-20 16:28:20,088 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 16:28:20,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 16:28:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 16:28:20,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2020-07-20 16:28:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 16:28:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 67 transitions. [2020-07-20 16:28:20,131 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 67 transitions. Word has length 35 [2020-07-20 16:28:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:20,132 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 67 transitions. [2020-07-20 16:28:20,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 16:28:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 67 transitions. [2020-07-20 16:28:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 16:28:20,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:20,141 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:20,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:20,343 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:20,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:20,344 INFO L82 PathProgramCache]: Analyzing trace with hash -692340191, now seen corresponding path program 2 times [2020-07-20 16:28:20,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:20,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135812347] [2020-07-20 16:28:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:20,388 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:20,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:20,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:28:20,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 16:28:20,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:20,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:20,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-20 16:28:20,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135812347] [2020-07-20 16:28:20,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:20,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 16:28:21,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602704017] [2020-07-20 16:28:21,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 16:28:21,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:21,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 16:28:21,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:28:21,002 INFO L87 Difference]: Start difference. First operand 41 states and 67 transitions. Second operand 13 states. [2020-07-20 16:28:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:21,257 INFO L93 Difference]: Finished difference Result 101 states and 246 transitions. [2020-07-20 16:28:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 16:28:21,259 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-20 16:28:21,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:21,264 INFO L225 Difference]: With dead ends: 101 [2020-07-20 16:28:21,264 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 16:28:21,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:28:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 16:28:21,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-07-20 16:28:21,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-20 16:28:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 135 transitions. [2020-07-20 16:28:21,290 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 135 transitions. Word has length 49 [2020-07-20 16:28:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:21,290 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 135 transitions. [2020-07-20 16:28:21,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 16:28:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 135 transitions. [2020-07-20 16:28:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 16:28:21,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:21,294 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:21,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:21,508 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:21,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:21,508 INFO L82 PathProgramCache]: Analyzing trace with hash -2059848011, now seen corresponding path program 3 times [2020-07-20 16:28:21,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:21,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277030489] [2020-07-20 16:28:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:21,565 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:28:21,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:21,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 16:28:21,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 16:28:21,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 16:28:22,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277030489] [2020-07-20 16:28:22,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 16:28:22,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2020-07-20 16:28:22,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121631552] [2020-07-20 16:28:22,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 16:28:22,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:22,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 16:28:22,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:28:22,306 INFO L87 Difference]: Start difference. First operand 68 states and 135 transitions. Second operand 9 states. [2020-07-20 16:28:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:22,498 INFO L93 Difference]: Finished difference Result 85 states and 177 transitions. [2020-07-20 16:28:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:28:22,498 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-07-20 16:28:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:22,502 INFO L225 Difference]: With dead ends: 85 [2020-07-20 16:28:22,502 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 16:28:22,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:28:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 16:28:22,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-07-20 16:28:22,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 16:28:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 172 transitions. [2020-07-20 16:28:22,524 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 172 transitions. Word has length 56 [2020-07-20 16:28:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:22,525 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 172 transitions. [2020-07-20 16:28:22,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 16:28:22,525 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 172 transitions. [2020-07-20 16:28:22,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 16:28:22,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:22,529 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:22,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:22,743 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:22,744 INFO L82 PathProgramCache]: Analyzing trace with hash -123056998, now seen corresponding path program 4 times [2020-07-20 16:28:22,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:22,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403737985] [2020-07-20 16:28:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:22,797 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:22,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:22,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 16:28:22,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 72 proven. 41 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-20 16:28:22,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:23,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:23,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:23,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:23,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:23,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 72 proven. 49 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-07-20 16:28:23,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403737985] [2020-07-20 16:28:23,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:23,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 16:28:23,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014665778] [2020-07-20 16:28:23,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 16:28:23,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:23,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 16:28:23,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:28:23,846 INFO L87 Difference]: Start difference. First operand 81 states and 172 transitions. Second operand 13 states. [2020-07-20 16:28:24,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:24,073 INFO L93 Difference]: Finished difference Result 141 states and 357 transitions. [2020-07-20 16:28:24,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:28:24,075 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-07-20 16:28:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:24,077 INFO L225 Difference]: With dead ends: 141 [2020-07-20 16:28:24,077 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 16:28:24,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 117 SyntacticMatches, 11 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-07-20 16:28:24,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 16:28:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2020-07-20 16:28:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 16:28:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 89 transitions. [2020-07-20 16:28:24,094 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 89 transitions. Word has length 69 [2020-07-20 16:28:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:24,095 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 89 transitions. [2020-07-20 16:28:24,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 16:28:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 89 transitions. [2020-07-20 16:28:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-20 16:28:24,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:24,098 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:24,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:24,305 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:24,306 INFO L82 PathProgramCache]: Analyzing trace with hash 462872480, now seen corresponding path program 5 times [2020-07-20 16:28:24,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:24,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112303775] [2020-07-20 16:28:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:24,371 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:24,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:24,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:28:24,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 82 proven. 75 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-07-20 16:28:24,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:25,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:25,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:25,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:25,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:25,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:25,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 82 proven. 84 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-20 16:28:25,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112303775] [2020-07-20 16:28:25,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:25,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 16:28:25,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761300932] [2020-07-20 16:28:25,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 16:28:25,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:25,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 16:28:25,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:28:25,514 INFO L87 Difference]: Start difference. First operand 55 states and 89 transitions. Second operand 17 states. [2020-07-20 16:28:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:25,876 INFO L93 Difference]: Finished difference Result 116 states and 228 transitions. [2020-07-20 16:28:25,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 16:28:25,877 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-07-20 16:28:25,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:25,879 INFO L225 Difference]: With dead ends: 116 [2020-07-20 16:28:25,896 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 16:28:25,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 126 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2020-07-20 16:28:25,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 16:28:25,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-07-20 16:28:25,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 16:28:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 124 transitions. [2020-07-20 16:28:25,925 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 124 transitions. Word has length 76 [2020-07-20 16:28:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:25,925 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 124 transitions. [2020-07-20 16:28:25,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 16:28:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 124 transitions. [2020-07-20 16:28:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-20 16:28:25,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:25,928 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:26,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:26,141 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:26,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:26,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1705279228, now seen corresponding path program 6 times [2020-07-20 16:28:26,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:26,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53630329] [2020-07-20 16:28:26,143 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:26,213 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:26,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:26,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:28:26,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 57 proven. 102 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-07-20 16:28:26,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:27,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:27,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:27,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:27,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:27,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:27,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:27,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 57 proven. 131 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-07-20 16:28:27,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53630329] [2020-07-20 16:28:27,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:27,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-20 16:28:27,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202332475] [2020-07-20 16:28:27,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 16:28:27,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:27,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 16:28:27,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:28:27,666 INFO L87 Difference]: Start difference. First operand 72 states and 124 transitions. Second operand 14 states. [2020-07-20 16:28:27,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:27,840 INFO L93 Difference]: Finished difference Result 103 states and 209 transitions. [2020-07-20 16:28:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:28:27,840 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-07-20 16:28:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:27,841 INFO L225 Difference]: With dead ends: 103 [2020-07-20 16:28:27,841 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 16:28:27,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 140 SyntacticMatches, 13 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:28:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 16:28:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 16:28:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 16:28:27,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 16:28:27,846 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2020-07-20 16:28:27,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:27,846 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 16:28:27,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 16:28:27,846 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 16:28:27,847 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 16:28:28,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:28,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 16:28:28,877 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 23 [2020-07-20 16:28:28,984 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2020-07-20 16:28:28,994 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 16:28:28,994 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:28:28,994 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:28:28,995 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 16:28:28,995 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 16:28:28,995 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 16:28:28,995 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2020-07-20 16:28:28,995 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (<= |ackermann_#in~n| ackermann_~n) (or (not (<= 0 |ackermann_#in~m|)) (<= 1 |ackermann_#in~m|)) (<= ackermann_~m |ackermann_#in~m|)) [2020-07-20 16:28:28,995 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2020-07-20 16:28:28,995 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-20 16:28:28,996 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (<= |ackermann_#in~n| ackermann_~n) (or (not (<= 0 |ackermann_#in~m|)) (<= 1 |ackermann_#in~m|)) (or (< 0 (+ |ackermann_#res| 2)) (< |ackermann_#in~n| 1)) (<= ackermann_~m |ackermann_#in~m|)) [2020-07-20 16:28:28,996 INFO L264 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (or (and (<= ackermann_~m |ackermann_#in~m|) (<= 2 ackermann_~m)) (and (<= ackermann_~m 0) (<= 0 |ackermann_#in~m|)) (and (<= 2 |ackermann_#t~ret1|) (<= ackermann_~m 1) (<= 1 |ackermann_#in~m|))) (<= |ackermann_#in~n| ackermann_~n)) [2020-07-20 16:28:28,996 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-20 16:28:28,996 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-20 16:28:28,996 INFO L268 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-07-20 16:28:28,996 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-20 16:28:28,996 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2020-07-20 16:28:28,997 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2020-07-20 16:28:28,997 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2020-07-20 16:28:28,997 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-20 16:28:28,997 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2020-07-20 16:28:28,997 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2020-07-20 16:28:28,997 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-07-20 16:28:28,997 INFO L268 CegarLoopResult]: For program point L41(lines 41 45) no Hoare annotation was computed. [2020-07-20 16:28:28,998 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (<= main_~m~0 3) [2020-07-20 16:28:28,998 INFO L268 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2020-07-20 16:28:28,998 INFO L268 CegarLoopResult]: For program point L34(lines 34 39) no Hoare annotation was computed. [2020-07-20 16:28:29,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:28:29 BoogieIcfgContainer [2020-07-20 16:28:29,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 16:28:29,007 INFO L168 Benchmark]: Toolchain (without parser) took 13664.36 ms. Allocated memory was 138.9 MB in the beginning and 323.5 MB in the end (delta: 184.5 MB). Free memory was 103.8 MB in the beginning and 96.8 MB in the end (delta: 7.0 MB). Peak memory consumption was 191.5 MB. Max. memory is 7.1 GB. [2020-07-20 16:28:29,007 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 16:28:29,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.01 ms. Allocated memory is still 138.9 MB. Free memory was 103.3 MB in the beginning and 93.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 16:28:29,009 INFO L168 Benchmark]: Boogie Preprocessor took 34.83 ms. Allocated memory is still 138.9 MB. Free memory was 93.8 MB in the beginning and 92.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 16:28:29,010 INFO L168 Benchmark]: RCFGBuilder took 400.38 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.5 MB in the beginning and 168.6 MB in the end (delta: -76.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 16:28:29,011 INFO L168 Benchmark]: TraceAbstraction took 12943.92 ms. Allocated memory was 201.9 MB in the beginning and 323.5 MB in the end (delta: 121.6 MB). Free memory was 167.9 MB in the beginning and 96.8 MB in the end (delta: 71.1 MB). Peak memory consumption was 192.8 MB. Max. memory is 7.1 GB. [2020-07-20 16:28:29,015 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 271.01 ms. Allocated memory is still 138.9 MB. Free memory was 103.3 MB in the beginning and 93.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.83 ms. Allocated memory is still 138.9 MB. Free memory was 93.8 MB in the beginning and 92.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 400.38 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.5 MB in the beginning and 168.6 MB in the end (delta: -76.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12943.92 ms. Allocated memory was 201.9 MB in the beginning and 323.5 MB in the end (delta: 121.6 MB). Free memory was 167.9 MB in the beginning and 96.8 MB in the end (delta: 71.1 MB). Peak memory consumption was 192.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.8s, OverallIterations: 9, TraceHistogramMax: 11, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 228 SDtfs, 348 SDslu, 979 SDs, 0 SdLazy, 1199 SolverSat, 405 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 906 GetRequests, 692 SyntacticMatches, 55 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 31 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 149 PreInvPairs, 231 NumberOfFragments, 85 HoareAnnotationTreeSize, 149 FomulaSimplifications, 2737 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 9 FomulaSimplificationsInter, 1452 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.4s InterpolantComputationTime, 433 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 834 ConstructedInterpolants, 0 QuantifiedInterpolants, 110332 SizeOfPredicates, 44 NumberOfNonLiveVariables, 987 ConjunctsInSsa, 97 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 1260/1802 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...