/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 BIGGEST_EQUIVALENCE_CLASS --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/Ackermann04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:02:41,224 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 22:02:41,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:02:41,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:02:41,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:02:41,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:02:41,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:02:41,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:02:41,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:02:41,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:02:41,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:02:41,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:02:41,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:02:41,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:02:41,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:02:41,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:02:41,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:02:41,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:02:41,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:02:41,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:02:41,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:02:41,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:02:41,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:02:41,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:02:41,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:02:41,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:02:41,300 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:02:41,314 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:02:41,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:02:41,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:02:41,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:02:41,316 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:02:41,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:02:41,316 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:02:41,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:02:41,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:02:41,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:02:41,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:02:41,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:02:41,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:02:41,318 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:02:41,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:02:41,318 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:02:41,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:02:41,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:02:41,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:02:41,319 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:02:41,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:02:41,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:02:41,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:02:41,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:02:41,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:02:41,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:02:41,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:41,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:02:41,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:02:41,321 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 22:02:41,626 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:02:41,639 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:02:41,643 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:02:41,644 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:02:41,645 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:02:41,645 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-21 22:02:41,707 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc335c465/14998ed939ac4ee3a99b511bcad3dd72/FLAG0eff815fc [2020-07-21 22:02:42,136 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:02:42,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-21 22:02:42,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc335c465/14998ed939ac4ee3a99b511bcad3dd72/FLAG0eff815fc [2020-07-21 22:02:42,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc335c465/14998ed939ac4ee3a99b511bcad3dd72 [2020-07-21 22:02:42,490 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:02:42,493 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:02:42,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:42,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:02:42,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:02:42,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:42" (1/1) ... [2020-07-21 22:02:42,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@125eb49d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:42, skipping insertion in model container [2020-07-21 22:02:42,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:42" (1/1) ... [2020-07-21 22:02:42,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:02:42,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:02:42,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:42,731 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:02:42,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:42,775 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:02:42,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:42 WrapperNode [2020-07-21 22:02:42,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:42,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:02:42,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:02:42,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:02:42,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:42" (1/1) ... [2020-07-21 22:02:42,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:42" (1/1) ... [2020-07-21 22:02:42,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:42" (1/1) ... [2020-07-21 22:02:42,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:42" (1/1) ... [2020-07-21 22:02:42,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:42" (1/1) ... [2020-07-21 22:02:42,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:42" (1/1) ... [2020-07-21 22:02:42,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:42" (1/1) ... [2020-07-21 22:02:42,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:02:42,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:02:42,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:02:42,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:02:42,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:02:43,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:02:43,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:02:43,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-21 22:02:43,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:02:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:02:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:02:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-21 22:02:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:02:43,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:02:43,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:02:43,223 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:02:43,224 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:02:43,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:43 BoogieIcfgContainer [2020-07-21 22:02:43,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:02:43,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:02:43,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:02:43,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:02:43,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:02:42" (1/3) ... [2020-07-21 22:02:43,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a4da66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:02:43, skipping insertion in model container [2020-07-21 22:02:43,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:42" (2/3) ... [2020-07-21 22:02:43,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a4da66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:02:43, skipping insertion in model container [2020-07-21 22:02:43,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:43" (3/3) ... [2020-07-21 22:02:43,237 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-07-21 22:02:43,248 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:02:43,256 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:02:43,271 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:02:43,319 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:02:43,320 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:02:43,320 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:02:43,320 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:02:43,321 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:02:43,321 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:02:43,321 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:02:43,321 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:02:43,351 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 22:02:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 22:02:43,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:43,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:43,363 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:43,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:43,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-21 22:02:43,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:43,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725151859] [2020-07-21 22:02:43,381 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 [2020-07-21 22:02:43,449 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:02:43,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:43,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:02:43,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:02:43,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:43,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725151859] [2020-07-21 22:02:43,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:43,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:02:43,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112098570] [2020-07-21 22:02:43,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:02:43,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:43,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:02:43,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:02:43,567 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-21 22:02:43,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:43,716 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-07-21 22:02:43,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:02:43,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 22:02:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:43,730 INFO L225 Difference]: With dead ends: 42 [2020-07-21 22:02:43,730 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 22:02:43,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:02:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 22:02:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 22:02:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 22:02:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-07-21 22:02:43,780 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-07-21 22:02:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:43,781 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-07-21 22:02:43,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:02:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-07-21 22:02:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 22:02:43,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:43,785 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] [2020-07-21 22:02:43,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:43,991 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:43,992 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-21 22:02:43,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:43,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359593675] [2020-07-21 22:02:43,994 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 [2020-07-21 22:02:44,043 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:02:44,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:44,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:02:44,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:02:44,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:02:44,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359593675] [2020-07-21 22:02:44,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:44,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 22:02:44,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252342459] [2020-07-21 22:02:44,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 22:02:44,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:44,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 22:02:44,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-21 22:02:44,226 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-07-21 22:02:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:44,381 INFO L93 Difference]: Finished difference Result 68 states and 118 transitions. [2020-07-21 22:02:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:02:44,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-21 22:02:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:44,386 INFO L225 Difference]: With dead ends: 68 [2020-07-21 22:02:44,386 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 22:02:44,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:02:44,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 22:02:44,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 22:02:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 22:02:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 69 transitions. [2020-07-21 22:02:44,406 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 69 transitions. Word has length 22 [2020-07-21 22:02:44,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:44,406 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 69 transitions. [2020-07-21 22:02:44,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 22:02:44,407 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 69 transitions. [2020-07-21 22:02:44,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 22:02:44,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:44,411 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:44,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:44,627 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:44,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:44,629 INFO L82 PathProgramCache]: Analyzing trace with hash -506207890, now seen corresponding path program 1 times [2020-07-21 22:02:44,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:44,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047110257] [2020-07-21 22:02:44,630 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 [2020-07-21 22:02:44,698 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:02:44,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:44,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:02:44,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-21 22:02:44,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:45,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:45,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:45,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:45,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 22:02:45,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047110257] [2020-07-21 22:02:45,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:45,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-21 22:02:45,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299098968] [2020-07-21 22:02:45,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 22:02:45,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:45,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 22:02:45,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 22:02:45,295 INFO L87 Difference]: Start difference. First operand 44 states and 69 transitions. Second operand 8 states. [2020-07-21 22:02:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:45,402 INFO L93 Difference]: Finished difference Result 61 states and 116 transitions. [2020-07-21 22:02:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:02:45,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-07-21 22:02:45,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:45,407 INFO L225 Difference]: With dead ends: 61 [2020-07-21 22:02:45,407 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 22:02:45,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:02:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 22:02:45,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-21 22:02:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 22:02:45,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2020-07-21 22:02:45,427 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 48 [2020-07-21 22:02:45,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:45,428 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2020-07-21 22:02:45,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 22:02:45,428 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2020-07-21 22:02:45,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 22:02:45,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:45,434 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:45,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:45,649 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:45,651 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 2 times [2020-07-21 22:02:45,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:45,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581750371] [2020-07-21 22:02:45,652 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 [2020-07-21 22:02:45,734 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:02:45,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:45,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:02:45,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-07-21 22:02:45,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 85 proven. 65 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-21 22:02:47,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581750371] [2020-07-21 22:02:47,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:47,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-07-21 22:02:47,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416746519] [2020-07-21 22:02:47,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 22:02:47,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:47,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 22:02:47,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:02:47,580 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand 24 states. [2020-07-21 22:02:48,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:48,379 INFO L93 Difference]: Finished difference Result 226 states and 903 transitions. [2020-07-21 22:02:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 22:02:48,385 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-07-21 22:02:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:48,406 INFO L225 Difference]: With dead ends: 226 [2020-07-21 22:02:48,406 INFO L226 Difference]: Without dead ends: 177 [2020-07-21 22:02:48,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=1625, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 22:02:48,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-21 22:02:48,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 95. [2020-07-21 22:02:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 22:02:48,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 275 transitions. [2020-07-21 22:02:48,474 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 275 transitions. Word has length 82 [2020-07-21 22:02:48,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:48,475 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 275 transitions. [2020-07-21 22:02:48,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 22:02:48,475 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 275 transitions. [2020-07-21 22:02:48,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 22:02:48,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:48,494 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:48,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:48,708 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:48,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1232135348, now seen corresponding path program 3 times [2020-07-21 22:02:48,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:48,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973876950] [2020-07-21 22:02:48,711 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 [2020-07-21 22:02:48,819 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:48,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:48,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 22:02:48,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 347 proven. 107 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2020-07-21 22:02:48,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:49,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 144 proven. 197 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2020-07-21 22:02:50,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973876950] [2020-07-21 22:02:50,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:50,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 22 [2020-07-21 22:02:50,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142755753] [2020-07-21 22:02:50,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:02:50,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:50,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:02:50,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:02:50,798 INFO L87 Difference]: Start difference. First operand 95 states and 275 transitions. Second operand 22 states. [2020-07-21 22:02:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:51,740 INFO L93 Difference]: Finished difference Result 256 states and 1032 transitions. [2020-07-21 22:02:51,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-21 22:02:51,740 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2020-07-21 22:02:51,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:51,746 INFO L225 Difference]: With dead ends: 256 [2020-07-21 22:02:51,747 INFO L226 Difference]: Without dead ends: 169 [2020-07-21 22:02:51,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 210 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=463, Invalid=1987, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 22:02:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-21 22:02:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 95. [2020-07-21 22:02:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 22:02:51,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 251 transitions. [2020-07-21 22:02:51,799 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 251 transitions. Word has length 121 [2020-07-21 22:02:51,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:51,799 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 251 transitions. [2020-07-21 22:02:51,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:02:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 251 transitions. [2020-07-21 22:02:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-21 22:02:51,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:51,804 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 12, 8, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:52,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:52,020 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:52,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:52,020 INFO L82 PathProgramCache]: Analyzing trace with hash 33355023, now seen corresponding path program 4 times [2020-07-21 22:02:52,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:52,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761084963] [2020-07-21 22:02:52,021 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 [2020-07-21 22:02:52,106 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:52,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:52,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 22:02:52,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 481 proven. 167 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-07-21 22:02:52,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:53,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:53,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 169 proven. 313 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2020-07-21 22:02:54,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761084963] [2020-07-21 22:02:54,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:54,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2020-07-21 22:02:54,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442656436] [2020-07-21 22:02:54,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:02:54,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:54,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:02:54,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:02:54,349 INFO L87 Difference]: Start difference. First operand 95 states and 251 transitions. Second operand 19 states. [2020-07-21 22:02:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:55,108 INFO L93 Difference]: Finished difference Result 282 states and 1234 transitions. [2020-07-21 22:02:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 22:02:55,109 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 141 [2020-07-21 22:02:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:55,120 INFO L225 Difference]: With dead ends: 282 [2020-07-21 22:02:55,120 INFO L226 Difference]: Without dead ends: 195 [2020-07-21 22:02:55,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 246 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 22:02:55,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-21 22:02:55,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 168. [2020-07-21 22:02:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-21 22:02:55,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 668 transitions. [2020-07-21 22:02:55,199 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 668 transitions. Word has length 141 [2020-07-21 22:02:55,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:55,200 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 668 transitions. [2020-07-21 22:02:55,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:02:55,200 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 668 transitions. [2020-07-21 22:02:55,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-21 22:02:55,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:55,212 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 13, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:55,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:55,427 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:55,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:55,428 INFO L82 PathProgramCache]: Analyzing trace with hash 179850299, now seen corresponding path program 5 times [2020-07-21 22:02:55,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:55,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870434789] [2020-07-21 22:02:55,430 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 [2020-07-21 22:02:55,533 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:55,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:55,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:02:55,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 504 proven. 24 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2020-07-21 22:02:55,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:56,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:56,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:56,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 134 proven. 284 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2020-07-21 22:02:56,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870434789] [2020-07-21 22:02:56,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:56,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 22:02:56,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201964272] [2020-07-21 22:02:56,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:02:56,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:56,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:02:56,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:02:56,561 INFO L87 Difference]: Start difference. First operand 168 states and 668 transitions. Second operand 13 states. [2020-07-21 22:02:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:56,871 INFO L93 Difference]: Finished difference Result 249 states and 1130 transitions. [2020-07-21 22:02:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:02:56,872 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 148 [2020-07-21 22:02:56,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:56,875 INFO L225 Difference]: With dead ends: 249 [2020-07-21 22:02:56,876 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 22:02:56,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 275 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:02:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 22:02:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-07-21 22:02:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 22:02:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 123 transitions. [2020-07-21 22:02:56,900 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 123 transitions. Word has length 148 [2020-07-21 22:02:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:56,900 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 123 transitions. [2020-07-21 22:02:56,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:02:56,901 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 123 transitions. [2020-07-21 22:02:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-21 22:02:56,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:56,908 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:57,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:57,124 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:57,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:57,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 6 times [2020-07-21 22:02:57,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:57,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729929190] [2020-07-21 22:02:57,125 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 [2020-07-21 22:02:57,261 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:02:57,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:57,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 22:02:57,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-07-21 22:02:57,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:59,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:59,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:59,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:59,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:59,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-07-21 22:03:02,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729929190] [2020-07-21 22:03:02,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:02,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 33 [2020-07-21 22:03:02,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322795899] [2020-07-21 22:03:02,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 22:03:02,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:02,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 22:03:02,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:03:02,072 INFO L87 Difference]: Start difference. First operand 74 states and 123 transitions. Second operand 33 states. [2020-07-21 22:03:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:03,201 INFO L93 Difference]: Finished difference Result 163 states and 313 transitions. [2020-07-21 22:03:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 22:03:03,202 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 160 [2020-07-21 22:03:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:03,204 INFO L225 Difference]: With dead ends: 163 [2020-07-21 22:03:03,205 INFO L226 Difference]: Without dead ends: 106 [2020-07-21 22:03:03,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 263 SyntacticMatches, 25 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=807, Invalid=3353, Unknown=0, NotChecked=0, Total=4160 [2020-07-21 22:03:03,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-21 22:03:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 91. [2020-07-21 22:03:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-21 22:03:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 158 transitions. [2020-07-21 22:03:03,217 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 158 transitions. Word has length 160 [2020-07-21 22:03:03,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:03,218 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 158 transitions. [2020-07-21 22:03:03,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 22:03:03,218 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 158 transitions. [2020-07-21 22:03:03,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-21 22:03:03,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:03,220 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:03,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:03,436 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 7 times [2020-07-21 22:03:03,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:03,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487775074] [2020-07-21 22:03:03,437 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 [2020-07-21 22:03:03,658 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:03:03,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:03,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 22:03:03,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 22:03:03,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:05,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:05,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:05,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:06,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:06,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:06,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2020-07-21 22:03:09,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487775074] [2020-07-21 22:03:09,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:09,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 30 [2020-07-21 22:03:09,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257629237] [2020-07-21 22:03:09,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 22:03:09,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:09,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 22:03:09,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:03:09,062 INFO L87 Difference]: Start difference. First operand 91 states and 158 transitions. Second operand 30 states. [2020-07-21 22:03:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:10,260 INFO L93 Difference]: Finished difference Result 190 states and 382 transitions. [2020-07-21 22:03:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 22:03:10,262 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 173 [2020-07-21 22:03:10,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:10,267 INFO L225 Difference]: With dead ends: 190 [2020-07-21 22:03:10,267 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 22:03:10,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 285 SyntacticMatches, 32 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=867, Invalid=3293, Unknown=0, NotChecked=0, Total=4160 [2020-07-21 22:03:10,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 22:03:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2020-07-21 22:03:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-21 22:03:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 181 transitions. [2020-07-21 22:03:10,281 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 181 transitions. Word has length 173 [2020-07-21 22:03:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:10,283 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 181 transitions. [2020-07-21 22:03:10,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 22:03:10,283 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 181 transitions. [2020-07-21 22:03:10,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-21 22:03:10,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:10,289 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:10,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:10,502 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:10,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:10,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 8 times [2020-07-21 22:03:10,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:10,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656145542] [2020-07-21 22:03:10,504 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:10,753 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:03:10,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:10,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-21 22:03:10,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-07-21 22:03:11,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:12,344 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:03:12,459 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:03:12,577 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 22:03:12,697 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 22:03:12,826 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:03:12,950 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:03:13,081 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 22:03:13,223 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 22:03:14,547 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:03:14,658 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:03:14,778 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 22:03:14,907 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 22:03:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 711 proven. 75 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2020-07-21 22:03:18,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656145542] [2020-07-21 22:03:18,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:18,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 35 [2020-07-21 22:03:18,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645717445] [2020-07-21 22:03:18,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 22:03:18,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:18,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 22:03:18,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 22:03:18,748 INFO L87 Difference]: Start difference. First operand 101 states and 181 transitions. Second operand 35 states. [2020-07-21 22:03:21,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:21,008 INFO L93 Difference]: Finished difference Result 153 states and 281 transitions. [2020-07-21 22:03:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-21 22:03:21,009 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 186 [2020-07-21 22:03:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:21,011 INFO L225 Difference]: With dead ends: 153 [2020-07-21 22:03:21,011 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:03:21,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 312 SyntacticMatches, 26 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1019, Invalid=4383, Unknown=0, NotChecked=0, Total=5402 [2020-07-21 22:03:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:03:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:03:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:03:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:03:21,016 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 186 [2020-07-21 22:03:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:21,016 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:03:21,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 22:03:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:03:21,017 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:03:21,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:21,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:03:23,629 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 14 [2020-07-21 22:03:24,868 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 175 DAG size of output: 48 [2020-07-21 22:03:25,056 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 10 [2020-07-21 22:03:25,158 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 22:03:25,158 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:03:25,158 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:03:25,158 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:03:25,158 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:03:25,158 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:03:25,159 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 22:03:25,159 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 22:03:25,159 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (or (not (<= |ackermann_#in~m| 0)) (not (<= 0 |ackermann_#in~m|))) (<= |ackermann_#in~n| ackermann_~n) (<= ackermann_~m |ackermann_#in~m|)) [2020-07-21 22:03:25,159 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-21 22:03:25,159 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (<= |ackermann_#in~n| ackermann_~n) (<= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| 0)) [2020-07-21 22:03:25,160 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse2 (<= |ackermann_#in~m| 0)) (.cse3 (<= |ackermann_#in~n| 2)) (.cse1 (<= 1 |ackermann_#in~m|)) (.cse0 (< |ackermann_#in~n| 2))) (and (or (not .cse0) .cse1) (or (not .cse2) .cse3) (let ((.cse9 (<= 5 |ackermann_#t~ret1|)) (.cse6 (<= 2 |ackermann_#t~ret1|)) (.cse7 (<= ackermann_~m 1)) (.cse4 (<= |ackermann_#in~m| ackermann_~m)) (.cse10 (<= 3 |ackermann_#t~ret1|)) (.cse5 (<= |ackermann_#in~n| ackermann_~n)) (.cse8 (<= ackermann_~m |ackermann_#in~m|))) (or (and .cse4 .cse5 .cse0 .cse6 .cse7) (and .cse4 .cse2 .cse5 (<= 0 |ackermann_#in~m|) .cse8) (and .cse4 .cse5 .cse9 .cse8 .cse3 .cse6 .cse1) (and (<= |ackermann_#in~n| 4) .cse4 .cse5 .cse9 .cse6 .cse7 .cse1) (and .cse4 .cse5 .cse8 .cse6 .cse1 (<= 6 |ackermann_#t~ret1|)) (and .cse4 .cse5 .cse6 .cse7 .cse1 (<= |ackermann_#in~n| 3) (<= 4 |ackermann_#t~ret1|)) (and .cse4 .cse10 .cse5 .cse6 .cse3 .cse7 .cse1) (and .cse4 .cse10 .cse5 .cse0 .cse8))))) [2020-07-21 22:03:25,160 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-21 22:03:25,160 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-21 22:03:25,160 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-21 22:03:25,160 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-21 22:03:25,160 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 22:03:25,160 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-21 22:03:25,161 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-21 22:03:25,161 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-21 22:03:25,161 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-21 22:03:25,161 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-21 22:03:25,161 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-21 22:03:25,161 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-21 22:03:25,161 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-21 22:03:25,162 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-21 22:03:25,162 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-21 22:03:25,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:03:25 BoogieIcfgContainer [2020-07-21 22:03:25,168 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:03:25,170 INFO L168 Benchmark]: Toolchain (without parser) took 42678.60 ms. Allocated memory was 144.2 MB in the beginning and 476.1 MB in the end (delta: 331.9 MB). Free memory was 100.8 MB in the beginning and 182.4 MB in the end (delta: -81.6 MB). Peak memory consumption was 352.9 MB. Max. memory is 7.1 GB. [2020-07-21 22:03:25,171 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 22:03:25,172 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.10 ms. Allocated memory is still 144.2 MB. Free memory was 100.4 MB in the beginning and 90.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:03:25,172 INFO L168 Benchmark]: Boogie Preprocessor took 46.87 ms. Allocated memory is still 144.2 MB. Free memory was 90.4 MB in the beginning and 89.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:03:25,173 INFO L168 Benchmark]: RCFGBuilder took 402.17 ms. Allocated memory was 144.2 MB in the beginning and 203.4 MB in the end (delta: 59.2 MB). Free memory was 89.0 MB in the beginning and 169.5 MB in the end (delta: -80.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 22:03:25,174 INFO L168 Benchmark]: TraceAbstraction took 41938.64 ms. Allocated memory was 203.4 MB in the beginning and 476.1 MB in the end (delta: 272.6 MB). Free memory was 169.5 MB in the beginning and 182.4 MB in the end (delta: -12.9 MB). Peak memory consumption was 362.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:03:25,177 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 119.1 MB in the beginning and 118.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.10 ms. Allocated memory is still 144.2 MB. Free memory was 100.4 MB in the beginning and 90.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.87 ms. Allocated memory is still 144.2 MB. Free memory was 90.4 MB in the beginning and 89.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 402.17 ms. Allocated memory was 144.2 MB in the beginning and 203.4 MB in the end (delta: 59.2 MB). Free memory was 89.0 MB in the beginning and 169.5 MB in the end (delta: -80.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 41938.64 ms. Allocated memory was 203.4 MB in the beginning and 476.1 MB in the end (delta: 272.6 MB). Free memory was 169.5 MB in the beginning and 182.4 MB in the end (delta: -12.9 MB). Peak memory consumption was 362.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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: 37.9s, OverallIterations: 10, TraceHistogramMax: 27, AutomataDifference: 7.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 272 SDtfs, 296 SDslu, 1693 SDs, 0 SdLazy, 3842 SolverSat, 874 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2363 GetRequests, 1861 SyntacticMatches, 135 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5007 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=168occurred 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: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 215 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 509 PreInvPairs, 1886 NumberOfFragments, 211 HoareAnnotationTreeSize, 509 FomulaSimplifications, 62763 FormulaSimplificationTreeSizeReduction, 2.2s HoareSimplificationTime, 9 FomulaSimplificationsInter, 27754 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 26.1s InterpolantComputationTime, 1096 NumberOfCodeBlocks, 794 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 2158 ConstructedInterpolants, 0 QuantifiedInterpolants, 587000 SizeOfPredicates, 71 NumberOfNonLiveVariables, 2372 ConjunctsInSsa, 197 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 12124/14858 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...