/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/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:31:28,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:31:28,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:31:28,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 00:31:28,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 00:31:28,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 00:31:28,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 00:31:28,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 00:31:28,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 00:31:28,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 00:31:28,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 00:31:28,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 00:31:28,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:31:28,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:31:28,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:31:28,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:31:28,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:31:28,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:31:28,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:31:28,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:31:28,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:31:28,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:31:28,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:31:28,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:31:28,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 00:31:28,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 00:31:28,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 00:31:28,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 00:31:28,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 00:31:28,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 00:31:28,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 00:31:28,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 00:31:28,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 00:31:28,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 00:31:28,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 00:31:28,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 00:31:28,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 00:31:28,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 00:31:28,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 00:31:28,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 00:31:28,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 00:31:28,355 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 00:31:28,370 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:31:28,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:31:28,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:31:28,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:31:28,373 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:31:28,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:31:28,373 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:31:28,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:31:28,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:31:28,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:31:28,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:31:28,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:31:28,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:31:28,374 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:31:28,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:31:28,375 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:31:28,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:31:28,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:31:28,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:31:28,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:31:28,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:31:28,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:31:28,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:31:28,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:31:28,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:31:28,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:31:28,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:28,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:31:28,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:31:28,377 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 00:31:28,655 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:31:28,671 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:31:28,674 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:31:28,676 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:31:28,676 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:31:28,677 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-21 00:31:28,742 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8217d94a7/c38bd81101204a3fa384831f21c88616/FLAG0be47e0e7 [2020-07-21 00:31:29,210 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:31:29,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-21 00:31:29,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8217d94a7/c38bd81101204a3fa384831f21c88616/FLAG0be47e0e7 [2020-07-21 00:31:29,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8217d94a7/c38bd81101204a3fa384831f21c88616 [2020-07-21 00:31:29,585 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:31:29,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:31:29,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:29,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:31:29,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:31:29,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:29" (1/1) ... [2020-07-21 00:31:29,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39805eb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29, skipping insertion in model container [2020-07-21 00:31:29,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:29" (1/1) ... [2020-07-21 00:31:29,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:31:29,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:31:29,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:29,791 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:31:29,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:29,821 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:31:29,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29 WrapperNode [2020-07-21 00:31:29,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:29,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:31:29,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:31:29,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:31:29,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (1/1) ... [2020-07-21 00:31:29,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (1/1) ... [2020-07-21 00:31:29,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (1/1) ... [2020-07-21 00:31:29,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (1/1) ... [2020-07-21 00:31:29,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (1/1) ... [2020-07-21 00:31:29,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (1/1) ... [2020-07-21 00:31:29,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (1/1) ... [2020-07-21 00:31:29,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:31:29,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:31:29,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:31:29,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:31:29,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (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 00:31:29,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:31:29,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:31:29,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-21 00:31:29,986 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:31:29,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:31:29,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:31:29,987 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-21 00:31:29,987 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:31:29,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:31:29,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:31:30,202 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:31:30,202 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:31:30,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:30 BoogieIcfgContainer [2020-07-21 00:31:30,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:31:30,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:31:30,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:31:30,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:31:30,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:31:29" (1/3) ... [2020-07-21 00:31:30,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563fef10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:30, skipping insertion in model container [2020-07-21 00:31:30,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:29" (2/3) ... [2020-07-21 00:31:30,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563fef10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:30, skipping insertion in model container [2020-07-21 00:31:30,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:30" (3/3) ... [2020-07-21 00:31:30,213 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-07-21 00:31:30,224 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:31:30,232 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:31:30,247 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:31:30,272 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:31:30,272 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:31:30,273 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:31:30,273 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:31:30,273 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:31:30,273 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:31:30,273 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:31:30,273 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:31:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 00:31:30,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 00:31:30,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:30,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:30,306 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:30,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:30,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-21 00:31:30,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:30,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130302276] [2020-07-21 00:31:30,319 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 00:31:30,416 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:31:30,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:30,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:31:30,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:30,551 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 00:31:30,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:30,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130302276] [2020-07-21 00:31:30,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:30,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 00:31:30,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539071705] [2020-07-21 00:31:30,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 00:31:30,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:30,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 00:31:30,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 00:31:30,575 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-07-21 00:31:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:30,777 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-07-21 00:31:30,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:31:30,779 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-21 00:31:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:30,791 INFO L225 Difference]: With dead ends: 41 [2020-07-21 00:31:30,791 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 00:31:30,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:31:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 00:31:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 00:31:30,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 00:31:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-21 00:31:30,849 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2020-07-21 00:31:30,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:30,850 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-21 00:31:30,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 00:31:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-21 00:31:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 00:31:30,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:30,854 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 00:31:31,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:31,070 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:31,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:31,071 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-21 00:31:31,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:31,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292711900] [2020-07-21 00:31:31,072 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 00:31:31,110 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:31:31,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:31,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:31:31,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:31:31,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:31:31,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292711900] [2020-07-21 00:31:31,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 00:31:31,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2020-07-21 00:31:31,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103934175] [2020-07-21 00:31:31,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 00:31:31,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:31,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 00:31:31,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:31:31,498 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 8 states. [2020-07-21 00:31:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:31,690 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-07-21 00:31:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:31:31,692 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-21 00:31:31,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:31,694 INFO L225 Difference]: With dead ends: 32 [2020-07-21 00:31:31,694 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 00:31:31,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:31:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 00:31:31,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 00:31:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 00:31:31,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-07-21 00:31:31,716 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 22 [2020-07-21 00:31:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:31,717 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-07-21 00:31:31,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 00:31:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-07-21 00:31:31,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 00:31:31,719 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:31,720 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:31,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:31,921 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:31,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:31,921 INFO L82 PathProgramCache]: Analyzing trace with hash 408363011, now seen corresponding path program 1 times [2020-07-21 00:31:31,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:31,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750319873] [2020-07-21 00:31:31,922 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 00:31:31,952 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:31,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:31,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:31:31,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:31:32,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:32,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:32,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 00:31:32,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750319873] [2020-07-21 00:31:32,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:32,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2020-07-21 00:31:32,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883314728] [2020-07-21 00:31:32,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:31:32,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:32,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:31:32,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:31:32,246 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 10 states. [2020-07-21 00:31:32,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:32,374 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-07-21 00:31:32,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:31:32,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-21 00:31:32,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:32,376 INFO L225 Difference]: With dead ends: 38 [2020-07-21 00:31:32,376 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 00:31:32,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:31:32,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 00:31:32,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 00:31:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 00:31:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-07-21 00:31:32,386 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2020-07-21 00:31:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:32,387 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-07-21 00:31:32,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:31:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-07-21 00:31:32,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-21 00:31:32,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:32,389 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:32,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:32,604 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:32,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:32,605 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2020-07-21 00:31:32,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:32,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926954278] [2020-07-21 00:31:32,607 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 00:31:32,648 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:31:32,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:32,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:31:32,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 00:31:32,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-21 00:31:33,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926954278] [2020-07-21 00:31:33,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:33,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2020-07-21 00:31:33,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566675134] [2020-07-21 00:31:33,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 00:31:33,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:33,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 00:31:33,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:31:33,370 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 22 states. [2020-07-21 00:31:33,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:33,964 INFO L93 Difference]: Finished difference Result 56 states and 88 transitions. [2020-07-21 00:31:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 00:31:33,964 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-07-21 00:31:33,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:33,972 INFO L225 Difference]: With dead ends: 56 [2020-07-21 00:31:33,972 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 00:31:33,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 00:31:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 00:31:33,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2020-07-21 00:31:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 00:31:33,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 67 transitions. [2020-07-21 00:31:33,992 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 67 transitions. Word has length 35 [2020-07-21 00:31:33,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:33,992 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 67 transitions. [2020-07-21 00:31:33,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 00:31:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 67 transitions. [2020-07-21 00:31:33,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-21 00:31:33,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:33,995 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:34,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:34,211 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:34,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:34,211 INFO L82 PathProgramCache]: Analyzing trace with hash -692340191, now seen corresponding path program 2 times [2020-07-21 00:31:34,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:34,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853808584] [2020-07-21 00:31:34,212 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 00:31:34,256 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:34,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:34,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 00:31:34,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-21 00:31:34,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-21 00:31:34,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853808584] [2020-07-21 00:31:34,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:34,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-07-21 00:31:34,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671987166] [2020-07-21 00:31:34,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:31:34,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:34,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:31:34,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:31:34,766 INFO L87 Difference]: Start difference. First operand 41 states and 67 transitions. Second operand 14 states. [2020-07-21 00:31:34,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:34,983 INFO L93 Difference]: Finished difference Result 84 states and 183 transitions. [2020-07-21 00:31:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:31:34,984 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-07-21 00:31:34,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:34,987 INFO L225 Difference]: With dead ends: 84 [2020-07-21 00:31:34,987 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 00:31:34,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:31:34,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 00:31:35,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-07-21 00:31:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 00:31:35,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 83 transitions. [2020-07-21 00:31:35,004 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 83 transitions. Word has length 49 [2020-07-21 00:31:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:35,005 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 83 transitions. [2020-07-21 00:31:35,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:31:35,005 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 83 transitions. [2020-07-21 00:31:35,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-21 00:31:35,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:35,008 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:35,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:35,214 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:35,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:35,215 INFO L82 PathProgramCache]: Analyzing trace with hash 320832088, now seen corresponding path program 3 times [2020-07-21 00:31:35,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:35,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420437123] [2020-07-21 00:31:35,216 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 00:31:35,257 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:35,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:35,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:31:35,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 46 proven. 27 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-21 00:31:35,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:35,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:35,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:35,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:31:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 46 proven. 34 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-21 00:31:35,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420437123] [2020-07-21 00:31:35,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:35,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 9 [2020-07-21 00:31:35,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049113199] [2020-07-21 00:31:35,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:31:35,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:35,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:31:35,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:31:35,708 INFO L87 Difference]: Start difference. First operand 48 states and 83 transitions. Second operand 9 states. [2020-07-21 00:31:35,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:35,831 INFO L93 Difference]: Finished difference Result 122 states and 312 transitions. [2020-07-21 00:31:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:31:35,835 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-07-21 00:31:35,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:35,843 INFO L225 Difference]: With dead ends: 122 [2020-07-21 00:31:35,843 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 00:31:35,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:31:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 00:31:35,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-21 00:31:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 00:31:35,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 154 transitions. [2020-07-21 00:31:35,881 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 154 transitions. Word has length 62 [2020-07-21 00:31:35,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:35,881 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 154 transitions. [2020-07-21 00:31:35,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:31:35,881 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 154 transitions. [2020-07-21 00:31:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 00:31:35,894 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:35,896 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:31:36,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:36,111 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:36,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:36,111 INFO L82 PathProgramCache]: Analyzing trace with hash -615976298, now seen corresponding path program 4 times [2020-07-21 00:31:36,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:36,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447454175] [2020-07-21 00:31:36,113 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 00:31:36,162 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:31:36,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:36,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 00:31:36,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 64 proven. 37 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-21 00:31:36,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:31:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 80 proven. 26 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-07-21 00:31:37,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447454175] [2020-07-21 00:31:37,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:31:37,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-07-21 00:31:37,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004755155] [2020-07-21 00:31:37,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 00:31:37,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:37,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 00:31:37,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:31:37,856 INFO L87 Difference]: Start difference. First operand 69 states and 154 transitions. Second operand 24 states. [2020-07-21 00:31:38,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:38,225 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-07-21 00:31:38,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 00:31:38,226 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-07-21 00:31:38,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:38,227 INFO L225 Difference]: With dead ends: 101 [2020-07-21 00:31:38,227 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 00:31:38,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 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 00:31:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 00:31:38,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 00:31:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 00:31:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 00:31:38,232 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2020-07-21 00:31:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:38,232 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 00:31:38,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 00:31:38,233 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 00:31:38,233 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 00:31:38,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:38,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 00:31:38,982 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 00:31:38,982 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:31:38,982 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:31:38,982 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 00:31:38,982 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 00:31:38,983 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 00:31:38,983 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2020-07-21 00:31:38,983 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (not (= ackermann_~m 0)) (<= ackermann_~n |ackermann_#in~n|) (<= |ackermann_#in~n| ackermann_~n)) [2020-07-21 00:31:38,983 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2020-07-21 00:31:38,983 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-21 00:31:38,984 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (not (= ackermann_~m 0)) (<= ackermann_~n |ackermann_#in~n|) (<= 0 |ackermann_#in~n|) (<= |ackermann_#in~n| ackermann_~n) (<= |ackermann_#in~n| 0)) [2020-07-21 00:31:38,984 INFO L264 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (<= |ackermann_#in~m| ackermann_~m)) (.cse1 (not (= ackermann_~m 0))) (.cse2 (<= |ackermann_#in~n| ackermann_~n))) (or (and .cse0 .cse1 .cse2 (<= (+ |ackermann_#in~m| 1) 0)) (and .cse0 .cse1 (<= ackermann_~n |ackermann_#in~n|) .cse2 (<= 2 |ackermann_#t~ret1|) (<= 1 |ackermann_#in~n|)))) [2020-07-21 00:31:38,984 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-21 00:31:38,984 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-21 00:31:38,985 INFO L268 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-07-21 00:31:38,985 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-21 00:31:38,985 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2020-07-21 00:31:38,986 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2020-07-21 00:31:38,986 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2020-07-21 00:31:38,986 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-21 00:31:38,986 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2020-07-21 00:31:38,986 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2020-07-21 00:31:38,986 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-07-21 00:31:38,987 INFO L268 CegarLoopResult]: For program point L41(lines 41 45) no Hoare annotation was computed. [2020-07-21 00:31:38,987 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (and (<= 0 main_~n~0) (<= 0 main_~m~0)) [2020-07-21 00:31:38,987 INFO L268 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2020-07-21 00:31:38,990 INFO L268 CegarLoopResult]: For program point L34(lines 34 39) no Hoare annotation was computed. [2020-07-21 00:31:38,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:31:38 BoogieIcfgContainer [2020-07-21 00:31:38,997 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:31:39,001 INFO L168 Benchmark]: Toolchain (without parser) took 9412.42 ms. Allocated memory was 137.9 MB in the beginning and 303.6 MB in the end (delta: 165.7 MB). Free memory was 103.0 MB in the beginning and 253.3 MB in the end (delta: -150.4 MB). Peak memory consumption was 174.6 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:39,003 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 00:31:39,004 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.15 ms. Allocated memory is still 137.9 MB. Free memory was 102.5 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:39,011 INFO L168 Benchmark]: Boogie Preprocessor took 29.93 ms. Allocated memory is still 137.9 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:39,013 INFO L168 Benchmark]: RCFGBuilder took 352.93 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 91.6 MB in the beginning and 167.7 MB in the end (delta: -76.0 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:39,014 INFO L168 Benchmark]: TraceAbstraction took 8790.25 ms. Allocated memory was 201.3 MB in the beginning and 303.6 MB in the end (delta: 102.2 MB). Free memory was 167.7 MB in the beginning and 253.3 MB in the end (delta: -85.7 MB). Peak memory consumption was 175.8 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:39,030 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 233.15 ms. Allocated memory is still 137.9 MB. Free memory was 102.5 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.93 ms. Allocated memory is still 137.9 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 352.93 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 91.6 MB in the beginning and 167.7 MB in the end (delta: -76.0 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8790.25 ms. Allocated memory was 201.3 MB in the beginning and 303.6 MB in the end (delta: 102.2 MB). Free memory was 167.7 MB in the beginning and 253.3 MB in the end (delta: -85.7 MB). Peak memory consumption was 175.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.1s, OverallIterations: 7, TraceHistogramMax: 9, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 151 SDtfs, 152 SDslu, 731 SDs, 0 SdLazy, 952 SolverSat, 172 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 590 GetRequests, 440 SyntacticMatches, 21 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 14 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 125 PreInvPairs, 207 NumberOfFragments, 83 HoareAnnotationTreeSize, 125 FomulaSimplifications, 762 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 9 FomulaSimplificationsInter, 519 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 280 NumberOfCodeBlocks, 211 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 532 ConstructedInterpolants, 0 QuantifiedInterpolants, 57049 SizeOfPredicates, 24 NumberOfNonLiveVariables, 653 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 673/840 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...