/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 00:31:31,228 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 00:31:31,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:31:31,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:31:31,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:31:31,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:31:31,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:31:31,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:31:31,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:31:31,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:31:31,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:31:31,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:31:31,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:31:31,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:31:31,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:31:31,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 00:31:31,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:31:31,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:31:31,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:31:31,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:31:31,300 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:31:31,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:31:31,301 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:31:31,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:31:31,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:31:31,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:31:31,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:31:31,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:31:31,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:31:31,302 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:31:31,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:31:31,303 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:31:31,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:31:31,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:31:31,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:31:31,303 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:31:31,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:31:31,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:31:31,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:31:31,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:31:31,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:31:31,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:31:31,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:31,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:31:31,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:31:31,305 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 00:31:31,580 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:31:31,594 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:31:31,598 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:31:31,601 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:31:31,603 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:31:31,604 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-21 00:31:31,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/170b0a375/6adacbfc116a448dbea836eafe8731ca/FLAG265b36e72 [2020-07-21 00:31:32,150 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:31:32,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-21 00:31:32,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/170b0a375/6adacbfc116a448dbea836eafe8731ca/FLAG265b36e72 [2020-07-21 00:31:32,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/170b0a375/6adacbfc116a448dbea836eafe8731ca [2020-07-21 00:31:32,520 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:31:32,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:31:32,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:32,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:31:32,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:31:32,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:32" (1/1) ... [2020-07-21 00:31:32,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8201e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:32, skipping insertion in model container [2020-07-21 00:31:32,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:32" (1/1) ... [2020-07-21 00:31:32,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:31:32,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:31:32,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:32,723 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:31:32,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:32,753 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:31:32,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:32 WrapperNode [2020-07-21 00:31:32,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:32,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:31:32,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:31:32,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:31:32,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:32" (1/1) ... [2020-07-21 00:31:32,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:32" (1/1) ... [2020-07-21 00:31:32,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:32" (1/1) ... [2020-07-21 00:31:32,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:32" (1/1) ... [2020-07-21 00:31:32,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:32" (1/1) ... [2020-07-21 00:31:32,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:32" (1/1) ... [2020-07-21 00:31:32,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:32" (1/1) ... [2020-07-21 00:31:32,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:31:32,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:31:32,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:31:32,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:31:32,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:32" (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 00:31:32,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:31:32,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:31:32,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-21 00:31:32,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:31:32,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:31:32,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:31:32,926 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-21 00:31:32,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:31:32,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:31:32,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:31:33,141 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:31:33,142 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:31:33,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:33 BoogieIcfgContainer [2020-07-21 00:31:33,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:31:33,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:31:33,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:31:33,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:31:33,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:31:32" (1/3) ... [2020-07-21 00:31:33,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad0c43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:33, skipping insertion in model container [2020-07-21 00:31:33,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:32" (2/3) ... [2020-07-21 00:31:33,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad0c43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:33, skipping insertion in model container [2020-07-21 00:31:33,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:33" (3/3) ... [2020-07-21 00:31:33,153 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-07-21 00:31:33,164 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:31:33,171 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:31:33,186 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:31:33,212 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:31:33,212 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:31:33,212 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:31:33,212 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:31:33,212 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:31:33,213 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:31:33,213 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:31:33,213 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:31:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 00:31:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 00:31:33,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:33,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:33,248 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:33,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-21 00:31:33,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:33,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435352352] [2020-07-21 00:31:33,272 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 00:31:33,367 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:31:33,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:33,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:31:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:33,465 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 00:31:33,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:33,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435352352] [2020-07-21 00:31:33,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:33,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:31:33,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797092470] [2020-07-21 00:31:33,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:31:33,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:33,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:31:33,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:31:33,486 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-21 00:31:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:33,631 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-07-21 00:31:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:31:33,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 00:31:33,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:33,644 INFO L225 Difference]: With dead ends: 42 [2020-07-21 00:31:33,645 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 00:31:33,649 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 00:31:33,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 00:31:33,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 00:31:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 00:31:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-07-21 00:31:33,700 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-07-21 00:31:33,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:33,701 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-07-21 00:31:33,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:31:33,701 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-07-21 00:31:33,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 00:31:33,704 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:33,704 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 00:31:33,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:33,921 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:33,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:33,922 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-21 00:31:33,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:33,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238702951] [2020-07-21 00:31:33,923 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 00:31:33,959 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:31:33,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:33,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:31:33,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:33,996 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 00:31:33,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:34,094 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 00:31:34,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238702951] [2020-07-21 00:31:34,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:34,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 00:31:34,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688803244] [2020-07-21 00:31:34,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 00:31:34,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:34,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 00:31:34,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-21 00:31:34,099 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-07-21 00:31:34,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:34,242 INFO L93 Difference]: Finished difference Result 68 states and 118 transitions. [2020-07-21 00:31:34,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:31:34,243 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-21 00:31:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:34,247 INFO L225 Difference]: With dead ends: 68 [2020-07-21 00:31:34,247 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 00:31:34,250 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 00:31:34,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 00:31:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 00:31:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 00:31:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 69 transitions. [2020-07-21 00:31:34,267 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 69 transitions. Word has length 22 [2020-07-21 00:31:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:34,268 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 69 transitions. [2020-07-21 00:31:34,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 00:31:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 69 transitions. [2020-07-21 00:31:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 00:31:34,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:34,273 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 00:31:34,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:34,486 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:34,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:34,488 INFO L82 PathProgramCache]: Analyzing trace with hash -506207890, now seen corresponding path program 1 times [2020-07-21 00:31:34,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:34,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405072061] [2020-07-21 00:31:34,489 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 00:31:34,548 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:31:34,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:34,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:31:34,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:34,610 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 00:31:34,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:34,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:35,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:35,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:35,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:35,171 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 00:31:35,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405072061] [2020-07-21 00:31:35,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:35,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-21 00:31:35,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121942769] [2020-07-21 00:31:35,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 00:31:35,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:35,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 00:31:35,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 00:31:35,182 INFO L87 Difference]: Start difference. First operand 44 states and 69 transitions. Second operand 8 states. [2020-07-21 00:31:35,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:35,277 INFO L93 Difference]: Finished difference Result 61 states and 116 transitions. [2020-07-21 00:31:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:31:35,278 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-07-21 00:31:35,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:35,281 INFO L225 Difference]: With dead ends: 61 [2020-07-21 00:31:35,282 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 00:31:35,283 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 00:31:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 00:31:35,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-21 00:31:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 00:31:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2020-07-21 00:31:35,301 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 48 [2020-07-21 00:31:35,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:35,302 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2020-07-21 00:31:35,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 00:31:35,302 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2020-07-21 00:31:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 00:31:35,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:35,308 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 00:31:35,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:35,514 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:35,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:35,515 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 2 times [2020-07-21 00:31:35,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:35,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850629642] [2020-07-21 00:31:35,516 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 00:31:35,579 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:35,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:35,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 00:31:35,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:35,726 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 00:31:35,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:37,448 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 00:31:37,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850629642] [2020-07-21 00:31:37,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:37,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-07-21 00:31:37,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024930234] [2020-07-21 00:31:37,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:31:37,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:37,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:31:37,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:31:37,455 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand 24 states. [2020-07-21 00:31:38,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:38,275 INFO L93 Difference]: Finished difference Result 226 states and 903 transitions. [2020-07-21 00:31:38,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 00:31:38,283 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-07-21 00:31:38,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:38,299 INFO L225 Difference]: With dead ends: 226 [2020-07-21 00:31:38,299 INFO L226 Difference]: Without dead ends: 177 [2020-07-21 00:31:38,312 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 00:31:38,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-21 00:31:38,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 95. [2020-07-21 00:31:38,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 00:31:38,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 275 transitions. [2020-07-21 00:31:38,388 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 275 transitions. Word has length 82 [2020-07-21 00:31:38,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:38,389 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 275 transitions. [2020-07-21 00:31:38,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:31:38,389 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 275 transitions. [2020-07-21 00:31:38,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 00:31:38,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:38,400 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 00:31:38,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:38,612 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:38,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:38,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1232135348, now seen corresponding path program 3 times [2020-07-21 00:31:38,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:38,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007015109] [2020-07-21 00:31:38,614 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 00:31:38,718 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:38,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:38,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 00:31:38,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:38,877 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 00:31:38,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:39,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:40,756 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 00:31:40,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007015109] [2020-07-21 00:31:40,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:40,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 22 [2020-07-21 00:31:40,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576658568] [2020-07-21 00:31:40,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:31:40,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:40,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:31:40,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:31:40,759 INFO L87 Difference]: Start difference. First operand 95 states and 275 transitions. Second operand 22 states. [2020-07-21 00:31:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:41,761 INFO L93 Difference]: Finished difference Result 256 states and 1032 transitions. [2020-07-21 00:31:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-21 00:31:41,762 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2020-07-21 00:31:41,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:41,769 INFO L225 Difference]: With dead ends: 256 [2020-07-21 00:31:41,769 INFO L226 Difference]: Without dead ends: 169 [2020-07-21 00:31:41,774 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 00:31:41,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-21 00:31:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 95. [2020-07-21 00:31:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 00:31:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 251 transitions. [2020-07-21 00:31:41,801 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 251 transitions. Word has length 121 [2020-07-21 00:31:41,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:41,802 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 251 transitions. [2020-07-21 00:31:41,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:31:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 251 transitions. [2020-07-21 00:31:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-07-21 00:31:41,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:41,811 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 13, 9, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:42,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:42,025 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:42,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:42,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1681770238, now seen corresponding path program 4 times [2020-07-21 00:31:42,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:42,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523459418] [2020-07-21 00:31:42,027 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 00:31:42,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:42,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:31:42,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 590 proven. 197 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-07-21 00:31:42,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:43,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:43,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:43,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:43,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:43,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:43,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:43,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:43,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 215 proven. 367 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2020-07-21 00:31:43,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523459418] [2020-07-21 00:31:43,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:43,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:31:43,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377063016] [2020-07-21 00:31:43,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:31:43,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:43,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:31:43,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:31:43,858 INFO L87 Difference]: Start difference. First operand 95 states and 251 transitions. Second operand 17 states. [2020-07-21 00:31:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:44,300 INFO L93 Difference]: Finished difference Result 182 states and 602 transitions. [2020-07-21 00:31:44,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 00:31:44,301 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 154 [2020-07-21 00:31:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:44,305 INFO L225 Difference]: With dead ends: 182 [2020-07-21 00:31:44,305 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 00:31:44,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 277 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2020-07-21 00:31:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 00:31:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-07-21 00:31:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 00:31:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 138 transitions. [2020-07-21 00:31:44,341 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 138 transitions. Word has length 154 [2020-07-21 00:31:44,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:44,342 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 138 transitions. [2020-07-21 00:31:44,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:31:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 138 transitions. [2020-07-21 00:31:44,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-21 00:31:44,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:44,348 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:44,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:44,550 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:44,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1835077495, now seen corresponding path program 5 times [2020-07-21 00:31:44,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:44,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439653067] [2020-07-21 00:31:44,552 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 00:31:44,647 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:44,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:44,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 00:31:44,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-07-21 00:31:44,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:45,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:46,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 155 proven. 295 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-07-21 00:31:46,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439653067] [2020-07-21 00:31:46,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:46,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2020-07-21 00:31:46,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877292511] [2020-07-21 00:31:46,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:31:46,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:46,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:31:46,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:31:46,870 INFO L87 Difference]: Start difference. First operand 82 states and 138 transitions. Second operand 19 states. [2020-07-21 00:31:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:47,451 INFO L93 Difference]: Finished difference Result 165 states and 311 transitions. [2020-07-21 00:31:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 00:31:47,452 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 134 [2020-07-21 00:31:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:47,455 INFO L225 Difference]: With dead ends: 165 [2020-07-21 00:31:47,456 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 00:31:47,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 232 SyntacticMatches, 18 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 00:31:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 00:31:47,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-07-21 00:31:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-21 00:31:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 170 transitions. [2020-07-21 00:31:47,470 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 170 transitions. Word has length 134 [2020-07-21 00:31:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:47,471 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 170 transitions. [2020-07-21 00:31:47,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:31:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 170 transitions. [2020-07-21 00:31:47,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-21 00:31:47,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:47,473 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 00:31:47,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:47,688 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:47,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:47,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 6 times [2020-07-21 00:31:47,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:47,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789747535] [2020-07-21 00:31:47,689 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 00:31:47,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:47,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:47,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 00:31:47,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:48,039 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 00:31:48,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:49,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:49,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:49,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:49,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:49,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:52,825 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 00:31:52,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789747535] [2020-07-21 00:31:52,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:52,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 33 [2020-07-21 00:31:52,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673841798] [2020-07-21 00:31:52,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 00:31:52,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:52,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 00:31:52,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 00:31:52,828 INFO L87 Difference]: Start difference. First operand 97 states and 170 transitions. Second operand 33 states. [2020-07-21 00:31:54,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:54,081 INFO L93 Difference]: Finished difference Result 211 states and 413 transitions. [2020-07-21 00:31:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 00:31:54,082 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 160 [2020-07-21 00:31:54,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:54,085 INFO L225 Difference]: With dead ends: 211 [2020-07-21 00:31:54,085 INFO L226 Difference]: Without dead ends: 131 [2020-07-21 00:31:54,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 263 SyntacticMatches, 25 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=807, Invalid=3353, Unknown=0, NotChecked=0, Total=4160 [2020-07-21 00:31:54,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-21 00:31:54,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2020-07-21 00:31:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 00:31:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 221 transitions. [2020-07-21 00:31:54,104 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 221 transitions. Word has length 160 [2020-07-21 00:31:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:54,105 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 221 transitions. [2020-07-21 00:31:54,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 00:31:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 221 transitions. [2020-07-21 00:31:54,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-21 00:31:54,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:54,108 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 00:31:54,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:54,322 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:54,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:54,322 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 7 times [2020-07-21 00:31:54,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:54,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265443576] [2020-07-21 00:31:54,323 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 00:31:54,496 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:54,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:54,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 00:31:54,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:54,723 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 00:31:54,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:56,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:56,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:56,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:56,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:56,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:56,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:59,946 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 00:31:59,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265443576] [2020-07-21 00:31:59,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:59,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 30 [2020-07-21 00:31:59,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494035546] [2020-07-21 00:31:59,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 00:31:59,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:59,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 00:31:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:31:59,949 INFO L87 Difference]: Start difference. First operand 121 states and 221 transitions. Second operand 30 states. [2020-07-21 00:32:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:01,124 INFO L93 Difference]: Finished difference Result 250 states and 509 transitions. [2020-07-21 00:32:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 00:32:01,127 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 173 [2020-07-21 00:32:01,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:01,132 INFO L225 Difference]: With dead ends: 250 [2020-07-21 00:32:01,132 INFO L226 Difference]: Without dead ends: 146 [2020-07-21 00:32:01,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 285 SyntacticMatches, 32 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=867, Invalid=3293, Unknown=0, NotChecked=0, Total=4160 [2020-07-21 00:32:01,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-21 00:32:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2020-07-21 00:32:01,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-21 00:32:01,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 257 transitions. [2020-07-21 00:32:01,152 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 257 transitions. Word has length 173 [2020-07-21 00:32:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:01,154 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 257 transitions. [2020-07-21 00:32:01,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 00:32:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 257 transitions. [2020-07-21 00:32:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-21 00:32:01,157 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:01,157 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 00:32:01,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:01,371 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:01,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:01,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 8 times [2020-07-21 00:32:01,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:01,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455083016] [2020-07-21 00:32:01,373 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 00:32:01,630 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:01,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:01,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-21 00:32:01,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:01,946 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 00:32:01,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:32:03,260 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 00:32:03,375 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 00:32:03,493 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 00:32:03,618 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 00:32:03,751 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 00:32:03,897 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 00:32:04,031 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 00:32:04,162 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 00:32:05,336 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 00:32:05,489 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 00:32:05,603 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 00:32:05,725 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 00:32:05,851 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 00:32:09,425 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 00:32:09,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455083016] [2020-07-21 00:32:09,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:32:09,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 35 [2020-07-21 00:32:09,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824810835] [2020-07-21 00:32:09,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 00:32:09,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:09,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 00:32:09,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 00:32:09,428 INFO L87 Difference]: Start difference. First operand 136 states and 257 transitions. Second operand 35 states. [2020-07-21 00:32:11,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:11,818 INFO L93 Difference]: Finished difference Result 176 states and 328 transitions. [2020-07-21 00:32:11,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-21 00:32:11,819 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 186 [2020-07-21 00:32:11,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:11,820 INFO L225 Difference]: With dead ends: 176 [2020-07-21 00:32:11,820 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 00:32:11,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 312 SyntacticMatches, 26 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1019, Invalid=4383, Unknown=0, NotChecked=0, Total=5402 [2020-07-21 00:32:11,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 00:32:11,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 00:32:11,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 00:32:11,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 00:32:11,829 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 186 [2020-07-21 00:32:11,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:11,830 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 00:32:11,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 00:32:11,830 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 00:32:11,830 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 00:32:12,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:12,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 00:32:14,271 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 14 [2020-07-21 00:32:15,610 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 180 DAG size of output: 44 [2020-07-21 00:32:15,782 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 10 [2020-07-21 00:32:15,871 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 00:32:15,871 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:32:15,871 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:32:15,871 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 00:32:15,871 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 00:32:15,871 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 00:32:15,872 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 00:32:15,872 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 00:32:15,872 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 00:32:15,872 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-21 00:32:15,872 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 00:32:15,873 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse6 (<= |ackermann_#in~m| ackermann_~m)) (.cse3 (<= 2 |ackermann_#in~m|)) (.cse7 (<= |ackermann_#in~n| ackermann_~n)) (.cse1 (<= ackermann_~m |ackermann_#in~m|)) (.cse8 (<= 2 |ackermann_#t~ret1|)) (.cse10 (<= 6 |ackermann_#t~ret1|))) (let ((.cse5 (< |ackermann_#in~n| 2)) (.cse0 (and .cse6 .cse3 .cse7 .cse1 .cse8 .cse10)) (.cse4 (<= 5 |ackermann_#t~ret1|)) (.cse2 (<= |ackermann_#in~m| 1))) (and (or .cse0 (and .cse1 .cse2 (<= 1 |ackermann_#in~m|)) (and (<= ackermann_~m 2) .cse3 .cse4) (and .cse3 .cse5)) (let ((.cse9 (<= 3 |ackermann_#t~ret1|))) (or (and .cse6 .cse7 .cse5 .cse2 .cse8) (and .cse6 .cse9 .cse7 .cse2 (<= |ackermann_#in~n| 3) (<= 4 |ackermann_#t~ret1|)) (and .cse6 .cse9 .cse7 .cse2 .cse10) (and .cse6 .cse9 .cse7 .cse1 (<= |ackermann_#in~n| 2) .cse8) .cse0 (and (<= |ackermann_#in~n| 4) .cse6 .cse9 .cse7 .cse4 .cse2)))))) [2020-07-21 00:32:15,873 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-21 00:32:15,873 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-21 00:32:15,873 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-21 00:32:15,873 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-21 00:32:15,873 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 00:32:15,873 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-21 00:32:15,874 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-21 00:32:15,874 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-21 00:32:15,874 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-21 00:32:15,874 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-21 00:32:15,874 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-21 00:32:15,874 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-21 00:32:15,874 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-21 00:32:15,874 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-21 00:32:15,874 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-21 00:32:15,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:32:15 BoogieIcfgContainer [2020-07-21 00:32:15,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:32:15,881 INFO L168 Benchmark]: Toolchain (without parser) took 43359.64 ms. Allocated memory was 136.3 MB in the beginning and 532.7 MB in the end (delta: 396.4 MB). Free memory was 101.4 MB in the beginning and 137.6 MB in the end (delta: -36.2 MB). Peak memory consumption was 402.9 MB. Max. memory is 7.1 GB. [2020-07-21 00:32:15,882 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 00:32:15,882 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.33 ms. Allocated memory is still 136.3 MB. Free memory was 101.0 MB in the beginning and 91.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 00:32:15,883 INFO L168 Benchmark]: Boogie Preprocessor took 26.68 ms. Allocated memory is still 136.3 MB. Free memory was 91.4 MB in the beginning and 90.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:32:15,883 INFO L168 Benchmark]: RCFGBuilder took 364.63 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 90.1 MB in the beginning and 166.8 MB in the end (delta: -76.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 00:32:15,884 INFO L168 Benchmark]: TraceAbstraction took 42732.93 ms. Allocated memory was 200.3 MB in the beginning and 532.7 MB in the end (delta: 332.4 MB). Free memory was 166.8 MB in the beginning and 137.6 MB in the end (delta: 29.2 MB). Peak memory consumption was 404.3 MB. Max. memory is 7.1 GB. [2020-07-21 00:32:15,887 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 229.33 ms. Allocated memory is still 136.3 MB. Free memory was 101.0 MB in the beginning and 91.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.68 ms. Allocated memory is still 136.3 MB. Free memory was 91.4 MB in the beginning and 90.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 364.63 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 90.1 MB in the beginning and 166.8 MB in the end (delta: -76.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 42732.93 ms. Allocated memory was 200.3 MB in the beginning and 532.7 MB in the end (delta: 332.4 MB). Free memory was 166.8 MB in the beginning and 137.6 MB in the end (delta: 29.2 MB). Peak memory consumption was 404.3 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: 38.8s, OverallIterations: 10, TraceHistogramMax: 27, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 270 SDtfs, 355 SDslu, 1842 SDs, 0 SdLazy, 4126 SolverSat, 915 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2360 GetRequests, 1849 SyntacticMatches, 141 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4979 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred in iteration=9, 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, 179 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 517 PreInvPairs, 1568 NumberOfFragments, 195 HoareAnnotationTreeSize, 517 FomulaSimplifications, 42219 FormulaSimplificationTreeSizeReduction, 2.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 24849 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 26.9s InterpolantComputationTime, 1095 NumberOfCodeBlocks, 833 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 2156 ConstructedInterpolants, 0 QuantifiedInterpolants, 606146 SizeOfPredicates, 74 NumberOfNonLiveVariables, 2478 ConjunctsInSsa, 203 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 11953/14872 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...