/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 DAGSIZE --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-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:31:23,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:31:23,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:31:23,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:31:23,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:31:23,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:31:23,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:31:23,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:31:23,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:31:23,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:31:23,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:31:23,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:31:23,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:31:23,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:31:23,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:31:23,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:31:23,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:31:23,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:31:23,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:31:23,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:31:23,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:31:23,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:31:23,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:31:23,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:31:23,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:31:23,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:31:23,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:31:23,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:31:23,149 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 19:31:23,163 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:31:23,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:31:23,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:31:23,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:31:23,166 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:31:23,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:31:23,167 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:31:23,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:31:23,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:31:23,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:31:23,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:31:23,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:31:23,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:31:23,168 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:31:23,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:31:23,168 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:31:23,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:31:23,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:31:23,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:31:23,170 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:31:23,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:31:23,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:31:23,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:31:23,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:31:23,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:31:23,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:31:23,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:23,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:31:23,172 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:31:23,172 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 -> DAGSIZE 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 19:31:23,471 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:31:23,485 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:31:23,489 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:31:23,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:31:23,490 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:31:23,491 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-07-21 19:31:23,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fec7de819/cc1a0ca1e8504c019f715946be9fe483/FLAG53f3711a9 [2020-07-21 19:31:23,948 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:31:23,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-07-21 19:31:23,959 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fec7de819/cc1a0ca1e8504c019f715946be9fe483/FLAG53f3711a9 [2020-07-21 19:31:24,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fec7de819/cc1a0ca1e8504c019f715946be9fe483 [2020-07-21 19:31:24,335 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:31:24,338 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:31:24,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:31:24,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:31:24,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:31:24,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:31:24" (1/1) ... [2020-07-21 19:31:24,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ede25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:24, skipping insertion in model container [2020-07-21 19:31:24,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:31:24" (1/1) ... [2020-07-21 19:31:24,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:31:24,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:31:24,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:31:24,607 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:31:24,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:31:24,639 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:31:24,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:24 WrapperNode [2020-07-21 19:31:24,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:31:24,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:31:24,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:31:24,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:31:24,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:24" (1/1) ... [2020-07-21 19:31:24,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:24" (1/1) ... [2020-07-21 19:31:24,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:24" (1/1) ... [2020-07-21 19:31:24,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:24" (1/1) ... [2020-07-21 19:31:24,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:24" (1/1) ... [2020-07-21 19:31:24,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:24" (1/1) ... [2020-07-21 19:31:24,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:24" (1/1) ... [2020-07-21 19:31:24,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:31:24,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:31:24,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:31:24,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:31:24,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:24" (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 19:31:24,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:31:24,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:31:24,805 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 19:31:24,805 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 19:31:24,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:31:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:31:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:31:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 19:31:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 19:31:24,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:31:24,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:31:24,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:31:24,992 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:31:24,993 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:31:24,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:31:24 BoogieIcfgContainer [2020-07-21 19:31:24,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:31:24,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:31:24,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:31:25,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:31:25,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:31:24" (1/3) ... [2020-07-21 19:31:25,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66347153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:31:25, skipping insertion in model container [2020-07-21 19:31:25,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:24" (2/3) ... [2020-07-21 19:31:25,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66347153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:31:25, skipping insertion in model container [2020-07-21 19:31:25,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:31:24" (3/3) ... [2020-07-21 19:31:25,006 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-07-21 19:31:25,016 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:31:25,032 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:31:25,073 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:31:25,126 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:31:25,126 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:31:25,127 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:31:25,127 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:31:25,127 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:31:25,127 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:31:25,127 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:31:25,127 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:31:25,147 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 19:31:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 19:31:25,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:25,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:25,155 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:25,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 19:31:25,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:25,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229881585] [2020-07-21 19:31:25,171 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 19:31:25,231 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:31:25,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:25,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:31:25,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:25,356 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 19:31:25,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:31:25,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229881585] [2020-07-21 19:31:25,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:31:25,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:31:25,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985193445] [2020-07-21 19:31:25,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:31:25,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:25,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:31:25,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:31:25,387 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 19:31:25,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:25,502 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 19:31:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:31:25,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 19:31:25,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:25,515 INFO L225 Difference]: With dead ends: 44 [2020-07-21 19:31:25,516 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 19:31:25,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 19:31:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 19:31:25,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 19:31:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:31:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 19:31:25,568 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 19:31:25,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:25,568 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 19:31:25,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:31:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 19:31:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 19:31:25,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:25,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:25,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:25,786 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:25,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:25,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 19:31:25,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:25,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389712392] [2020-07-21 19:31:25,790 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 19:31:25,818 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:31:25,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:25,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:31:25,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:25,866 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 19:31:25,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:31:25,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389712392] [2020-07-21 19:31:25,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:31:25,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:31:25,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812195809] [2020-07-21 19:31:25,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:31:25,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:25,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:31:25,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:31:25,874 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 19:31:25,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:25,944 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 19:31:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:31:25,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 19:31:25,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:25,946 INFO L225 Difference]: With dead ends: 36 [2020-07-21 19:31:25,947 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 19:31:25,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 19:31:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 19:31:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 19:31:25,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:31:25,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 19:31:25,957 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 19:31:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:25,958 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 19:31:25,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:31:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 19:31:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 19:31:25,960 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:25,960 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:26,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:26,175 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:26,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:26,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 19:31:26,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:26,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723855708] [2020-07-21 19:31:26,178 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 19:31:26,218 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:26,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:26,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:31:26,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:26,275 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 19:31:26,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:26,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:26,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:26,482 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 19:31:26,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723855708] [2020-07-21 19:31:26,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:26,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 19:31:26,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934838816] [2020-07-21 19:31:26,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 19:31:26,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:26,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 19:31:26,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 19:31:26,499 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2020-07-21 19:31:26,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:26,605 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 19:31:26,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:31:26,606 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 19:31:26,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:26,608 INFO L225 Difference]: With dead ends: 41 [2020-07-21 19:31:26,608 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 19:31:26,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:31:26,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 19:31:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 19:31:26,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 19:31:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 19:31:26,619 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 19:31:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:26,619 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 19:31:26,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 19:31:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 19:31:26,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 19:31:26,621 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:26,621 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, 1, 1, 1, 1, 1] [2020-07-21 19:31:26,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:26,830 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:26,831 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 19:31:26,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:26,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059467563] [2020-07-21 19:31:26,833 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 19:31:26,865 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:26,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:26,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:31:26,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:26,942 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 19:31:26,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:27,062 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 19:31:27,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059467563] [2020-07-21 19:31:27,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:27,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-21 19:31:27,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740958465] [2020-07-21 19:31:27,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 19:31:27,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:27,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 19:31:27,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:31:27,066 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 19:31:27,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:27,138 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2020-07-21 19:31:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:31:27,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 19:31:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:27,142 INFO L225 Difference]: With dead ends: 49 [2020-07-21 19:31:27,142 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 19:31:27,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:31:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 19:31:27,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-07-21 19:31:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 19:31:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2020-07-21 19:31:27,168 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 27 [2020-07-21 19:31:27,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:27,168 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2020-07-21 19:31:27,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 19:31:27,169 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2020-07-21 19:31:27,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 19:31:27,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:27,171 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:27,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:27,372 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:27,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1725129826, now seen corresponding path program 1 times [2020-07-21 19:31:27,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:27,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999003268] [2020-07-21 19:31:27,373 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 19:31:27,400 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:27,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:27,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:31:27,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:31:27,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:31:27,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999003268] [2020-07-21 19:31:27,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:31:27,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 19:31:27,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990241757] [2020-07-21 19:31:27,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 19:31:27,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:27,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 19:31:27,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 19:31:27,448 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand 7 states. [2020-07-21 19:31:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:27,555 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2020-07-21 19:31:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:31:27,556 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-21 19:31:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:27,558 INFO L225 Difference]: With dead ends: 49 [2020-07-21 19:31:27,558 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 19:31:27,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 19:31:27,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 19:31:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-07-21 19:31:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 19:31:27,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2020-07-21 19:31:27,567 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 28 [2020-07-21 19:31:27,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:27,568 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2020-07-21 19:31:27,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 19:31:27,568 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2020-07-21 19:31:27,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 19:31:27,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:27,570 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1] [2020-07-21 19:31:27,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:27,785 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:27,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:27,786 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 19:31:27,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:27,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712792072] [2020-07-21 19:31:27,788 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 19:31:27,822 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:27,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:27,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 19:31:27,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 19:31:27,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:28,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:28,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 19:31:28,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712792072] [2020-07-21 19:31:28,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:28,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-21 19:31:28,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519065105] [2020-07-21 19:31:28,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 19:31:28,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:28,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 19:31:28,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:31:28,139 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand 11 states. [2020-07-21 19:31:28,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:28,318 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2020-07-21 19:31:28,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:31:28,318 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 19:31:28,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:28,319 INFO L225 Difference]: With dead ends: 40 [2020-07-21 19:31:28,319 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 19:31:28,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:31:28,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 19:31:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 19:31:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 19:31:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 19:31:28,322 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2020-07-21 19:31:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:28,322 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 19:31:28,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 19:31:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 19:31:28,322 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 19:31:28,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:28,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 19:31:28,745 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 19:31:28,745 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:31:28,745 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:31:28,746 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 19:31:28,746 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 19:31:28,746 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 19:31:28,746 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 19:31:28,746 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-21 19:31:28,746 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-21 19:31:28,746 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-21 19:31:28,746 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 19:31:28,747 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 19:31:28,747 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 2) (<= 2 main_~x~0)) [2020-07-21 19:31:28,747 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 19:31:28,747 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-21 19:31:28,747 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-21 19:31:28,747 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 19:31:28,747 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 19:31:28,747 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 19:31:28,747 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 19:31:28,748 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-21 19:31:28,748 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 19:31:28,748 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-21 19:31:28,748 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-21 19:31:28,748 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-21 19:31:28,748 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-21 19:31:28,748 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-21 19:31:28,748 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse1 (<= fibo1_~n |fibo1_#in~n|)) (.cse0 (<= |fibo1_#in~n| fibo1_~n))) (or (and (or (and (= 1 |fibo1_#t~ret0|) .cse0) (and (<= |fibo1_#in~n| 1) .cse0)) .cse1) (and .cse1 (<= 3 |fibo1_#in~n|) .cse0))) [2020-07-21 19:31:28,749 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 19:31:28,749 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-21 19:31:28,749 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-21 19:31:28,749 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-21 19:31:28,749 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 19:31:28,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:31:28 BoogieIcfgContainer [2020-07-21 19:31:28,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:31:28,758 INFO L168 Benchmark]: Toolchain (without parser) took 4419.58 ms. Allocated memory was 137.9 MB in the beginning and 248.5 MB in the end (delta: 110.6 MB). Free memory was 102.8 MB in the beginning and 171.9 MB in the end (delta: -69.1 MB). Peak memory consumption was 41.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:31:28,759 INFO L168 Benchmark]: CDTParser took 0.23 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 19:31:28,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.58 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 92.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:31:28,761 INFO L168 Benchmark]: Boogie Preprocessor took 101.18 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 92.9 MB in the beginning and 179.4 MB in the end (delta: -86.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:31:28,762 INFO L168 Benchmark]: RCFGBuilder took 255.53 ms. Allocated memory is still 200.3 MB. Free memory was 179.4 MB in the beginning and 165.9 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:31:28,763 INFO L168 Benchmark]: TraceAbstraction took 3755.77 ms. Allocated memory was 200.3 MB in the beginning and 248.5 MB in the end (delta: 48.2 MB). Free memory was 165.2 MB in the beginning and 171.9 MB in the end (delta: -6.7 MB). Peak memory consumption was 41.6 MB. Max. memory is 7.1 GB. [2020-07-21 19:31:28,766 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.58 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 92.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 101.18 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 92.9 MB in the beginning and 179.4 MB in the end (delta: -86.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 255.53 ms. Allocated memory is still 200.3 MB. Free memory was 179.4 MB in the beginning and 165.9 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3755.77 ms. Allocated memory was 200.3 MB in the beginning and 248.5 MB in the end (delta: 48.2 MB). Free memory was 165.2 MB in the beginning and 171.9 MB in the end (delta: -6.7 MB). Peak memory consumption was 41.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 170 SDtfs, 94 SDslu, 695 SDs, 0 SdLazy, 399 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 244 GetRequests, 191 SyntacticMatches, 10 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 18 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 23 PreInvPairs, 29 NumberOfFragments, 70 HoareAnnotationTreeSize, 23 FomulaSimplifications, 47 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 41 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 147 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 13970 SizeOfPredicates, 13 NumberOfNonLiveVariables, 311 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 33/53 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...