/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 12:56:05,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:56:05,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:56:05,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:56:05,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:56:05,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:56:05,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:56:05,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:56:05,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:56:05,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:56:05,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:56:05,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:56:05,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:56:05,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:56:05,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:56:05,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:56:05,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:56:05,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:56:05,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:56:05,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:56:05,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:56:05,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:56:05,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:56:05,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:56:05,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:56:05,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:56:05,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:56:05,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:56:05,214 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 12:56:05,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:56:05,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:56:05,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:56:05,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:56:05,249 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:56:05,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:56:05,249 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:56:05,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:56:05,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:56:05,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:56:05,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:56:05,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:56:05,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:56:05,252 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:56:05,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:56:05,252 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:56:05,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:56:05,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:56:05,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:56:05,253 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:56:05,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:56:05,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:56:05,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:56:05,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:56:05,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:56:05,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:56:05,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:05,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:56:05,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:56:05,255 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 -> 2 [2020-07-21 12:56:05,544 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:56:05,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:56:05,561 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:56:05,562 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:56:05,562 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:56:05,563 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-21 12:56:05,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3da6378eb/35572540058e4cce98eca2b2722e9b73/FLAG9e76a2d4a [2020-07-21 12:56:06,029 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:56:06,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-21 12:56:06,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3da6378eb/35572540058e4cce98eca2b2722e9b73/FLAG9e76a2d4a [2020-07-21 12:56:06,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3da6378eb/35572540058e4cce98eca2b2722e9b73 [2020-07-21 12:56:06,409 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:56:06,412 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:56:06,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:56:06,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:56:06,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:56:06,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:56:06" (1/1) ... [2020-07-21 12:56:06,420 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 12:56:06, skipping insertion in model container [2020-07-21 12:56:06,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:56:06" (1/1) ... [2020-07-21 12:56:06,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:56:06,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:56:06,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:56:06,644 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:56:06,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:56:06,671 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:56:06,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:06 WrapperNode [2020-07-21 12:56:06,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:56:06,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:56:06,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:56:06,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:56:06,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:06" (1/1) ... [2020-07-21 12:56:06,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:06" (1/1) ... [2020-07-21 12:56:06,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:06" (1/1) ... [2020-07-21 12:56:06,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:06" (1/1) ... [2020-07-21 12:56:06,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:06" (1/1) ... [2020-07-21 12:56:06,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:06" (1/1) ... [2020-07-21 12:56:06,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:06" (1/1) ... [2020-07-21 12:56:06,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:56:06,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:56:06,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:56:06,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:56:06,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:06" (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 12:56:06,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:56:06,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:56:06,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-21 12:56:06,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:56:06,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:56:06,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:56:06,849 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-21 12:56:06,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:56:06,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:56:06,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:56:07,033 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:56:07,034 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:56:07,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:56:07 BoogieIcfgContainer [2020-07-21 12:56:07,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:56:07,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:56:07,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:56:07,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:56:07,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:56:06" (1/3) ... [2020-07-21 12:56:07,043 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 12:56:07, skipping insertion in model container [2020-07-21 12:56:07,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:06" (2/3) ... [2020-07-21 12:56:07,044 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 12:56:07, skipping insertion in model container [2020-07-21 12:56:07,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:56:07" (3/3) ... [2020-07-21 12:56:07,046 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-07-21 12:56:07,056 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:56:07,063 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:56:07,077 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:56:07,100 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:56:07,100 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:56:07,100 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:56:07,101 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:56:07,101 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:56:07,101 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:56:07,101 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:56:07,101 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:56:07,119 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 12:56:07,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 12:56:07,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:07,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:07,127 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:07,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-21 12:56:07,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:07,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725151859] [2020-07-21 12:56:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:56:07,205 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:56:07,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:07,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:56:07,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:07,337 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 12:56:07,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:07,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725151859] [2020-07-21 12:56:07,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:07,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:56:07,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112098570] [2020-07-21 12:56:07,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:56:07,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:07,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:56:07,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:56:07,363 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-21 12:56:07,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:07,498 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-07-21 12:56:07,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:56:07,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 12:56:07,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:07,511 INFO L225 Difference]: With dead ends: 42 [2020-07-21 12:56:07,511 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 12:56:07,515 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 12:56:07,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 12:56:07,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 12:56:07,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 12:56:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-07-21 12:56:07,561 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-07-21 12:56:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:07,562 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-07-21 12:56:07,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:56:07,563 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-07-21 12:56:07,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 12:56:07,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:07,566 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 12:56:07,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:07,782 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:07,784 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-21 12:56:07,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:07,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359593675] [2020-07-21 12:56:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:56:07,846 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:56:07,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:07,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:56:07,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 12:56:07,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:08,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:08,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 12:56:08,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359593675] [2020-07-21 12:56:08,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:08,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-21 12:56:08,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149118899] [2020-07-21 12:56:08,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:56:08,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:08,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:56:08,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:56:08,155 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-07-21 12:56:08,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:08,293 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-07-21 12:56:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:56:08,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-21 12:56:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:08,298 INFO L225 Difference]: With dead ends: 38 [2020-07-21 12:56:08,299 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 12:56:08,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 12:56:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 12:56:08,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-21 12:56:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 12:56:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2020-07-21 12:56:08,327 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 22 [2020-07-21 12:56:08,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:08,329 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2020-07-21 12:56:08,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:56:08,330 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2020-07-21 12:56:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 12:56:08,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:08,335 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:08,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:08,537 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash 687949058, now seen corresponding path program 2 times [2020-07-21 12:56:08,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:08,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552719098] [2020-07-21 12:56:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:56:08,579 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:08,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:08,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:56:08,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 12:56:08,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 12:56:08,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552719098] [2020-07-21 12:56:08,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:08,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 12:56:08,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337344700] [2020-07-21 12:56:08,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:56:08,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:08,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:56:08,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:56:08,689 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 8 states. [2020-07-21 12:56:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:08,831 INFO L93 Difference]: Finished difference Result 87 states and 187 transitions. [2020-07-21 12:56:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:56:08,831 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-21 12:56:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:08,836 INFO L225 Difference]: With dead ends: 87 [2020-07-21 12:56:08,836 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 12:56:08,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 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 12:56:08,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 12:56:08,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-21 12:56:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 12:56:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2020-07-21 12:56:08,860 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 29 [2020-07-21 12:56:08,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:08,861 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2020-07-21 12:56:08,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:56:08,861 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2020-07-21 12:56:08,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 12:56:08,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:08,868 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:09,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:09,081 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:09,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:09,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2091057537, now seen corresponding path program 1 times [2020-07-21 12:56:09,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:09,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796699286] [2020-07-21 12:56:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:56:09,158 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:56:09,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:09,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 12:56:09,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 385 proven. 112 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-21 12:56:09,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:10,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:10,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:10,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:11,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:11,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:11,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:11,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:11,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 124 proven. 305 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-07-21 12:56:11,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796699286] [2020-07-21 12:56:11,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:11,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 12:56:11,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765978787] [2020-07-21 12:56:11,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 12:56:11,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:11,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 12:56:11,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 12:56:11,209 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand 17 states. [2020-07-21 12:56:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:11,713 INFO L93 Difference]: Finished difference Result 144 states and 403 transitions. [2020-07-21 12:56:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 12:56:11,713 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 122 [2020-07-21 12:56:11,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:11,719 INFO L225 Difference]: With dead ends: 144 [2020-07-21 12:56:11,719 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 12:56:11,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 211 SyntacticMatches, 17 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2020-07-21 12:56:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 12:56:11,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-07-21 12:56:11,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 12:56:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 154 transitions. [2020-07-21 12:56:11,747 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 154 transitions. Word has length 122 [2020-07-21 12:56:11,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:11,748 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 154 transitions. [2020-07-21 12:56:11,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 12:56:11,748 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 154 transitions. [2020-07-21 12:56:11,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 12:56:11,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:11,752 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 12:56:11,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:11,967 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:11,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:11,968 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 2 times [2020-07-21 12:56:11,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:11,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440660870] [2020-07-21 12:56:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:56:12,050 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:12,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:12,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 12:56:12,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:12,149 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 12:56:12,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:13,740 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 12:56:13,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440660870] [2020-07-21 12:56:13,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:13,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-07-21 12:56:13,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734202329] [2020-07-21 12:56:13,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 12:56:13,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:13,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 12:56:13,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-21 12:56:13,743 INFO L87 Difference]: Start difference. First operand 82 states and 154 transitions. Second operand 24 states. [2020-07-21 12:56:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:14,142 INFO L93 Difference]: Finished difference Result 150 states and 303 transitions. [2020-07-21 12:56:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 12:56:14,143 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-07-21 12:56:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:14,146 INFO L225 Difference]: With dead ends: 150 [2020-07-21 12:56:14,146 INFO L226 Difference]: Without dead ends: 85 [2020-07-21 12:56:14,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 12:56:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-21 12:56:14,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-07-21 12:56:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 12:56:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 146 transitions. [2020-07-21 12:56:14,166 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 146 transitions. Word has length 82 [2020-07-21 12:56:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:14,166 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 146 transitions. [2020-07-21 12:56:14,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 12:56:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 146 transitions. [2020-07-21 12:56:14,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 12:56:14,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:14,171 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 12:56:14,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:14,386 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:14,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:14,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1060139340, now seen corresponding path program 3 times [2020-07-21 12:56:14,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:14,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110209927] [2020-07-21 12:56:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:56:14,481 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:14,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:14,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 12:56:14,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 385 proven. 71 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2020-07-21 12:56:14,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:15,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 126 proven. 215 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2020-07-21 12:56:16,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110209927] [2020-07-21 12:56:16,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:16,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 22 [2020-07-21 12:56:16,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552040102] [2020-07-21 12:56:16,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 12:56:16,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:16,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 12:56:16,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-07-21 12:56:16,356 INFO L87 Difference]: Start difference. First operand 82 states and 146 transitions. Second operand 22 states. [2020-07-21 12:56:16,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:16,834 INFO L93 Difference]: Finished difference Result 150 states and 285 transitions. [2020-07-21 12:56:16,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 12:56:16,835 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2020-07-21 12:56:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:16,838 INFO L225 Difference]: With dead ends: 150 [2020-07-21 12:56:16,838 INFO L226 Difference]: Without dead ends: 85 [2020-07-21 12:56:16,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 210 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=1126, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 12:56:16,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-21 12:56:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-07-21 12:56:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 12:56:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 138 transitions. [2020-07-21 12:56:16,878 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 138 transitions. Word has length 121 [2020-07-21 12:56:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:16,878 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 138 transitions. [2020-07-21 12:56:16,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 12:56:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 138 transitions. [2020-07-21 12:56:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-21 12:56:16,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:16,883 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 12:56:17,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:17,084 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:17,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:17,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1835077495, now seen corresponding path program 4 times [2020-07-21 12:56:17,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:17,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611755619] [2020-07-21 12:56:17,085 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:56:17,203 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:17,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:17,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 12:56:17,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:17,336 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 12:56:17,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:18,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:18,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:19,308 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 12:56:19,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611755619] [2020-07-21 12:56:19,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:19,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2020-07-21 12:56:19,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708142668] [2020-07-21 12:56:19,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 12:56:19,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:19,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 12:56:19,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-07-21 12:56:19,310 INFO L87 Difference]: Start difference. First operand 82 states and 138 transitions. Second operand 19 states. [2020-07-21 12:56:19,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:19,876 INFO L93 Difference]: Finished difference Result 165 states and 311 transitions. [2020-07-21 12:56:19,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 12:56:19,877 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 134 [2020-07-21 12:56:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:19,882 INFO L225 Difference]: With dead ends: 165 [2020-07-21 12:56:19,882 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 12:56:19,884 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 12:56:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 12:56:19,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-07-21 12:56:19,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-21 12:56:19,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 170 transitions. [2020-07-21 12:56:19,917 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 170 transitions. Word has length 134 [2020-07-21 12:56:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:19,921 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 170 transitions. [2020-07-21 12:56:19,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 12:56:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 170 transitions. [2020-07-21 12:56:19,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-21 12:56:19,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:19,925 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 12:56:20,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:20,141 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:20,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 5 times [2020-07-21 12:56:20,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:20,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321484012] [2020-07-21 12:56:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:56:20,284 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:20,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:20,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 12:56:20,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:20,490 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 12:56:20,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:21,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:22,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:22,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:22,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:22,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:24,979 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 12:56:24,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321484012] [2020-07-21 12:56:24,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:24,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 33 [2020-07-21 12:56:24,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769461211] [2020-07-21 12:56:24,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 12:56:24,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:24,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 12:56:24,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 12:56:24,982 INFO L87 Difference]: Start difference. First operand 97 states and 170 transitions. Second operand 33 states. [2020-07-21 12:56:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:26,094 INFO L93 Difference]: Finished difference Result 211 states and 413 transitions. [2020-07-21 12:56:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 12:56:26,096 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 160 [2020-07-21 12:56:26,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:26,099 INFO L225 Difference]: With dead ends: 211 [2020-07-21 12:56:26,099 INFO L226 Difference]: Without dead ends: 131 [2020-07-21 12:56:26,103 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 12:56:26,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-21 12:56:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2020-07-21 12:56:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 12:56:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 221 transitions. [2020-07-21 12:56:26,122 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 221 transitions. Word has length 160 [2020-07-21 12:56:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:26,122 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 221 transitions. [2020-07-21 12:56:26,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 12:56:26,123 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 221 transitions. [2020-07-21 12:56:26,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-21 12:56:26,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:26,125 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 12:56:26,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:26,338 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:26,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:26,339 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 6 times [2020-07-21 12:56:26,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:26,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576125918] [2020-07-21 12:56:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:56:26,521 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:26,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:26,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 12:56:26,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:26,770 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 12:56:26,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:28,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:28,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:28,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:28,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:28,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:28,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:31,744 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 12:56:31,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576125918] [2020-07-21 12:56:31,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:31,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 30 [2020-07-21 12:56:31,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538683815] [2020-07-21 12:56:31,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 12:56:31,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:31,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 12:56:31,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2020-07-21 12:56:31,747 INFO L87 Difference]: Start difference. First operand 121 states and 221 transitions. Second operand 30 states. [2020-07-21 12:56:32,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:32,807 INFO L93 Difference]: Finished difference Result 250 states and 509 transitions. [2020-07-21 12:56:32,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 12:56:32,812 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 173 [2020-07-21 12:56:32,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:32,816 INFO L225 Difference]: With dead ends: 250 [2020-07-21 12:56:32,816 INFO L226 Difference]: Without dead ends: 146 [2020-07-21 12:56:32,820 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 12:56:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-21 12:56:32,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2020-07-21 12:56:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-21 12:56:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 257 transitions. [2020-07-21 12:56:32,857 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 257 transitions. Word has length 173 [2020-07-21 12:56:32,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:32,860 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 257 transitions. [2020-07-21 12:56:32,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 12:56:32,861 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 257 transitions. [2020-07-21 12:56:32,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-21 12:56:32,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:32,865 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 12:56:33,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:33,081 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:33,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 7 times [2020-07-21 12:56:33,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:33,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942685421] [2020-07-21 12:56:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 12:56:33,332 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:33,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:33,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-21 12:56:33,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:33,607 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 12:56:33,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:34,911 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 12:56:35,026 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 12:56:35,145 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 12:56:35,261 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 12:56:35,380 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 12:56:35,501 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 12:56:35,628 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 12:56:35,751 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 12:56:36,775 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 12:56:36,997 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 12:56:37,107 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 12:56:37,225 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 12:56:37,338 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 12:56:40,740 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 12:56:40,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942685421] [2020-07-21 12:56:40,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:40,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 35 [2020-07-21 12:56:40,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563267239] [2020-07-21 12:56:40,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 12:56:40,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:40,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 12:56:40,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 12:56:40,743 INFO L87 Difference]: Start difference. First operand 136 states and 257 transitions. Second operand 35 states. [2020-07-21 12:56:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:43,131 INFO L93 Difference]: Finished difference Result 176 states and 328 transitions. [2020-07-21 12:56:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-21 12:56:43,136 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 186 [2020-07-21 12:56:43,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:43,137 INFO L225 Difference]: With dead ends: 176 [2020-07-21 12:56:43,137 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 12:56:43,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 312 SyntacticMatches, 26 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1019, Invalid=4383, Unknown=0, NotChecked=0, Total=5402 [2020-07-21 12:56:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 12:56:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 12:56:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 12:56:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 12:56:43,142 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 186 [2020-07-21 12:56:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:43,143 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 12:56:43,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 12:56:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 12:56:43,143 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 12:56:43,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:43,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 12:56:44,732 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 14 [2020-07-21 12:56:45,770 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 142 DAG size of output: 36 [2020-07-21 12:56:45,948 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 16 [2020-07-21 12:56:46,053 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 12:56:46,053 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:56:46,053 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:56:46,053 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 12:56:46,053 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 12:56:46,054 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 12:56:46,054 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 12:56:46,054 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 12:56:46,054 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 12:56:46,054 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-21 12:56:46,054 INFO L264 CegarLoopResult]: At program point L19(line 19) 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|) (<= |ackermann_#in~n| 0)) [2020-07-21 12:56:46,054 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse5 (< |ackermann_#in~n| 2)) (.cse2 (<= |ackermann_#in~m| 1)) (.cse7 (<= 5 |ackermann_#t~ret1|)) (.cse6 (<= 6 |ackermann_#t~ret1|))) (and (let ((.cse0 (<= |ackermann_#in~m| ackermann_~m)) (.cse1 (<= |ackermann_#in~n| ackermann_~n)) (.cse3 (<= ackermann_~m |ackermann_#in~m|)) (.cse4 (<= 1 |ackermann_#in~m|))) (or (and .cse0 .cse1 .cse2 .cse3 (<= |ackermann_#in~n| 3) .cse4 (<= 4 |ackermann_#t~ret1|)) (and .cse0 .cse1 .cse5 .cse2 .cse3 (<= 2 |ackermann_#t~ret1|) .cse4) (and .cse0 .cse1 .cse3 .cse4 .cse6) (and .cse0 (<= 3 |ackermann_#t~ret1|) .cse1 .cse3 (<= |ackermann_#in~n| 2) .cse4) (and .cse0 (<= |ackermann_#in~n| 4) .cse1 .cse7 .cse2 .cse3 .cse4))) (or .cse5 .cse2 (and (<= ackermann_~m 2) .cse7) .cse6))) [2020-07-21 12:56:46,054 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-21 12:56:46,054 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-21 12:56:46,055 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-21 12:56:46,055 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-21 12:56:46,055 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 12:56:46,055 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-21 12:56:46,055 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-21 12:56:46,055 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-21 12:56:46,055 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-21 12:56:46,055 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-21 12:56:46,055 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-21 12:56:46,056 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-21 12:56:46,056 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-21 12:56:46,056 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-21 12:56:46,056 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-21 12:56:46,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:56:46 BoogieIcfgContainer [2020-07-21 12:56:46,060 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 12:56:46,062 INFO L168 Benchmark]: Toolchain (without parser) took 39651.39 ms. Allocated memory was 144.7 MB in the beginning and 509.6 MB in the end (delta: 364.9 MB). Free memory was 102.3 MB in the beginning and 146.2 MB in the end (delta: -43.9 MB). Peak memory consumption was 369.1 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:46,062 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 12:56:46,063 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.14 ms. Allocated memory is still 144.7 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:46,064 INFO L168 Benchmark]: Boogie Preprocessor took 27.15 ms. Allocated memory is still 144.7 MB. Free memory was 92.4 MB in the beginning and 91.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:46,064 INFO L168 Benchmark]: RCFGBuilder took 337.94 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 91.0 MB in the beginning and 169.1 MB in the end (delta: -78.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:46,065 INFO L168 Benchmark]: TraceAbstraction took 39021.52 ms. Allocated memory was 202.4 MB in the beginning and 509.6 MB in the end (delta: 307.2 MB). Free memory was 168.4 MB in the beginning and 146.2 MB in the end (delta: 22.2 MB). Peak memory consumption was 377.5 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:46,068 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.14 ms. Allocated memory is still 144.7 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.15 ms. Allocated memory is still 144.7 MB. Free memory was 92.4 MB in the beginning and 91.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 337.94 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 91.0 MB in the beginning and 169.1 MB in the end (delta: -78.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 39021.52 ms. Allocated memory was 202.4 MB in the beginning and 509.6 MB in the end (delta: 307.2 MB). Free memory was 168.4 MB in the beginning and 146.2 MB in the end (delta: 22.2 MB). Peak memory consumption was 377.5 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: 36.2s, OverallIterations: 10, TraceHistogramMax: 27, AutomataDifference: 7.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 267 SDtfs, 431 SDslu, 1617 SDs, 0 SdLazy, 3420 SolverSat, 1052 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2232 GetRequests, 1745 SyntacticMatches, 139 SemanticMatches, 348 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4538 ImplicationChecksByTransitivity, 6.8s 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, 29 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 489 PreInvPairs, 1064 NumberOfFragments, 167 HoareAnnotationTreeSize, 489 FomulaSimplifications, 31517 FormulaSimplificationTreeSizeReduction, 1.2s HoareSimplificationTime, 9 FomulaSimplificationsInter, 8072 FormulaSimplificationTreeSizeReductionInter, 1.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 25.5s InterpolantComputationTime, 1044 NumberOfCodeBlocks, 965 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 2054 ConstructedInterpolants, 0 QuantifiedInterpolants, 573476 SizeOfPredicates, 73 NumberOfNonLiveVariables, 2950 ConjunctsInSsa, 201 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 11124/13838 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...